Фотометрическое устройство обнаружения нефтепродуктов в воде

Полезная модель относится к измерительной технике для обнаружения и диагностики степени загрязнения нефтепродуктами жидкости, в частности к спектрофотометрической аппаратуре, и может быть использована для анализа количества содержания примесей нефтепродуктов в сточных водах систем охлаждения или до/после очистных сооружений. Технический результат - повышение точности обнаружения нефтепродуктов в воде, упрощение конструкции, расширение арсенала средств для обнаружения нефтепродуктов в воде. Фотометрическое устройство обнаружения нефтепродуктов в воде, содержащее корпус, внутри которого установлена Т-образная перегородка, разделяющая между собой зону УФ-излучения и зону фотофиксации, в зоне УФ-излучения последовательно расположены на одной оптической оси источник ультрафиолетового излучения, собирающая линза, первый светофильтр, формирующий световой поток с длиной волны преимущественно 190-260 нм, в зоне фотофиксации на одной оптической оси последовательно расположены второй светофильтр, ...

ФОТОМЕТРИЧЕСКОЕ УСТРОЙСТВО РАСПОЗНАВАНИЯ МНОГОКОМПОНЕНТНЫХ ПРИМЕСЕЙ НЕФТЕПРОДУКТОВ В ВОДЕ

Устройство относится к области фотометрии и касается фотометрического устройства распознавания многокомпонентных примесей нефтепродуктов в воде. Устройство состоит из широкополосного источника ультрафиолетового излучения, проточной кюветы, фотоприемного устройства и устройства управления фотоприемником и анализа фотосигналов. Фотоприемное устройство выполнено в виде алмазного фотоприемникка с зависящей от величины напряжения смещения формой аппаратной функции фоточувствительности в диапазоне 190÷240 нм. Устройство управления фотоприемником и анализа фотосигналов получает сигналы от фотоприемника и на их основе рассчитывает концентрации нефтепродуктов в воде по алгоритму, построенному на основе решения системы линейных уравнений, построенной на основе закона поглощения света Бугера-Ламберта-Бэра и предположения отсутствия взаимодействия нефтепродуктов с водой и друг с другом. Технический результат заключается в упрощении конструкции устройства. 3 ил.

УСТРОЙСТВО ДЛЯ СПЕКТРАЛЬНОГО АНАЛИЗА

Использование: в эмиссионном спектральном анализе различных материалов. Сущность: в устройство введены последовательно соединенные датчик линейного перемещения, формирователь импульсов, счетчик и блок вычисления длины волны, выход которого подключен к третьему входу блока памяти спектра пробы и входу блока управления, четвертый выход которого соединен с вторым входом счетчика, первый вход которого связан с вторым входом аналого-цифрового преобразователя. 1 з.п. ф-лы, 2 ил.

ЛИДАР ДИФФЕРЕНЦИАЛЬНОГО ПОГЛОЩЕНИЯ НА МОБИЛЬНОМ НОСИТЕЛЕ

Лидар дифференциального поглощения на мобильном носителе включает в себя лазерный излучатель, рандомизатор фазы лазерного излучения, приемопередающий оптический тракт, где передающая часть состоит из системы направляющих зеркал, а приемная часть состоит из приемного телескопа, зеркал, направляющих собранное телескопом излучение на фотоприемный модуль, и светофильтра, уменьшающего засветку фотоприемника за счет узкой полосы пропускания, пилотного лазера, и отличается тем, что передающий канал генерирует направленное излучение с требуемыми пространственно-временными и спектральными характеристиками, позволяющими исключить влияние спекл-структуры на результаты лидарных измерений.

ПОЛИХРОМАТОР

Изобретение относится к средствам измерения интенсивности и спектрального состава инфракрасного, видимого или ультрафиолетового излучения и может быть использовано для изучения оптических свойств и состава атмосферы. Полихроматор содержит сканирующее устройство, входную оптику, диспергирующий элемент, селектор длин волн, линейку выходных щелей, выходную оптику и фотодетектор, причем выходная оптика содержит ряд призматических линз, установленных напротив выходных щелей и параллельно включенных в оптическую связь между линейкой выходных щелей и фотодетектором. В частности, призматические линзы могут быть выполнены в виде призм с плоскими поверхностями. Технический результат заключается в сокращении потерь на поглощение и отражение света, уменьшении габаритов и массы прибора, упрощении его изготовления.

ПОЛИХРОМАТОР

Полихроматор относится к средствам для измерения интенсивности спектрального состава оптического излучения. Полихроматор содержит сканирующее устройство с зеркалом или линзой, снабженное шаговым приводом, светофильтр с полосой пропускания в ультрафиолетовой и красной области спектра, линзу, входную щель, маховик с отверстиями прерывателя и отверстиями селектора длин волн, диспергирующий элемент в виде вогнутой дифракционной решетки, средство сближения длинноволновой и коротковолновой частей спектра - зеркало переноса. Рассеянный атмосферный свет отражается линзой, фильтр пропускает измеряемые ультрафиолетовые и красные части спектра на линзу, которая фокусирует отраженное излучение земной атмосферы на входной щели, свет модулируется с заданной частотой прерывателем на маховике, затем расходящийся пучок лучей отражается дифракционной решеткой и фокусируется на линейку выходных щелей, нулевой порядок решетки отражается зеркалом переноса и фокусируется на оптической оси коллимирующей линзы ...

Способ определения концентраций компонентов агрессивного раствора

Изобретение относится к лазерной спектроскопии комбинационного рассеяния света и используется для количественного анализа компонентов окрашенных агрессивных растворов. Целью изобретения является повышение точности определения, компонентов агрессивного раствора. Для ее реализации первую по ходу лазерного излучения камеру двухкамерной кюветы заполняют неокрашенным раствором, а вторую-стандартом. Получают спектры комбинационного рассеяния по схеме освещения на просвет и определяют их относительные интенсивности. Затем первую по ходу лазерного излучения камеру кюветы заполняют окрашенным раствором, а вторую-стандартом и вновь определяют относительные интенсивности полос комбинационного рассеяния. Из полученных данных строят первую зависимость относитель- ных интенсивностей полос растворителя к стандарту. После этого строят вторую зависимость для относительной интенсивности стандарта. Для этого используют значения интенсивности полосы рассеяния стандарта при заполнении первой по ходу лазерного ...

Спектровизор

Способ измерения концентрации электронов в плазме

Improvements in or relating to method and apparatus for automatically indicating the spectrum of energy emanating from objects

... 954,979. Photo-electric spectrometers. PRETEMA A.G. May 3,1960 [May 4,1959], No. 15590/60, Heading G1A. The spectral distribution of radiation emitted or reflected by, or transmitted through, an object is displayed as an amplitude modulated pulse train 9 on a cathode-ray tube 4 by projecting the spectrum of the radiation on to the strip photoelectrode 2 of a pick-up tube 1 which is scanned synchronously with the display tube 4 by a timebase oscillator 3 and applying the output from the electrode 2 to a variable gain amplifier 8 to amplitude modulate a pulse train produced by a frequency multiplier 5 and pulse counting circuit 6 coupled to the oscillator 3, the output from the amplifier 8 being applied to the vertical deflection members of the display tube 4; a separate amplitude regulator 7, e.g. a potentiometer, is provided in each pulse output of the counter 6 for adjustment of the spectral sensitivity of the display. In a modification, Fig. 2 (not shown) the frequency multiplier 5 and ...

Spectral discrimination apparatus and method

Spectrophotometer

A spectrophotometer wherein in order to set the instrument to a designated wavelength, the monochromator is first set to the designated wavelength position intended to be as such on the monochromator, and the entrance and exit slits of the monochromator are widened so as to measure a beam of light having a spectrum with an emission line at the designated wavelength, and the sensitivity of the light measuring circuit is so adjusted that the output therefrom is kept at a predetermined constant level, and then the slits are narrowed, whereupon wavelength scanning is conducted over a range of wavelengths including the designated wavelength so as to detect a peak in the emission line spectrum, and then the dispersing element is set to the detected peak position. A microcomputer controls the above operation in a sequential manner.

SPECTROPHOTOMETER

Confocal Raman analysing apparatus and method

A Raman analysing apparatus 100 includes an irradiation system 45 with a light source 25, a scanning device 11, an imaging optical system 30 and a detector 14. The scanning device 11 includes a plurality of apertures 19 and is movable with respect to the optical path of the light 65. Light 65 is directed onto the scanning device 11 to illuminate an object 55 at a plurality of illumination points 66. Raman scattered light from the points 66 is imaged at an intermediate image plane at the scanning device 11 and then passes through either a spectral filter 32 and/or a spectral analyser 70 before being detected at a detector 14. The scanning device 1 may be a rotating disk 11 and may include a second spinning disk with lenses 17 aligned with the pinhole apertures 19. In another embodiment the illumination points 66 on the sample 55 are simultaneously illuminated.

PROCEDURE AND DEVICE FOR AUTOMATIC DETECTING AND ILLUSTRATION, IN PARTICULAR FOR VEGETATION LOTS OF RANGES

APPARATUS AND PROCEDURE FOR THE SPECTRAL DISTINCTION

Device for measurement of optical wavelengths

Spectrophotometer

SPECTROPHOTOMETER

A DETECTOR SYSTEM COMPRISING A PLURALITY OF LIGHT GUIDES AND A SPECTROMETER COMPRISING THE DETECTOR SYSTEM

A detector system (100) comprising a plurality of light guides (11a, 11b, 11c, 11d) is provided. Each light guide (11a, 11b, 11c, 11d) is guiding incoming light from a respective object in use, wherein the incoming light is provided by means of an illuminating means (10). The detector system (100) comprises diffracting means (12) for diffracting the incoming light in different wavelength ranges, at least one focuser (13) for projecting the incoming light exiting the light guides onto the diffracting means, a detector (14) having a detector area for receiving the diffracted light from the plurality of Sight guides, and a control unit (15). These are arranged to pulsate incoming light via only one light guide at a time based on a pulse timing parameter, and record a spectrum of light diffracted from each light guide and detected by the detector (14) based on the pulse timing parameter.

METHOD AND APPARATUS FOR ILLUMINATING AN OBJECT FIELD IMAGED BY A RECTANGULAR IMAGE SENSOR

An illuminator apparatus and method for illuminating an object field imaged by a rectangular image sensor having a first aspect ratio is disclosed. The apparatus includes an optical fiber having a proximal end disposed to receive a plurality of input light beams, each having differing spectral properties, and to transmit the light beams along the fiber to a distal end. The apparatus also includes an integrating element disposed to receive the light beams from the distal end of the fiber and combine the beams to produce a generally homogenous illumination beam at a rectangular output face of the integrating element. An illumination projector is operable to project an image of the output face of the integrating element into the object field to produce a generally rectangular illuminated region of the object field substantially corresponding to the portion of the object field imaged by the rectangular image sensor.

CONTAMINANT IDENTIFICATION AND CONCENTRATION DETERMINATION BY MONITORING THE INTENSITY OF THE OUTPUT OF AN INTRACAVITY LASER

A method and apparatus for detecting the presence of a specific concentration of gaseous species within a calibrated range in a gas sample are disclosed. The ILS gas detection system (10) of the present invention simply comprises an ILS laser (12) and an optical detector (16). However, the potential or operational wavelength bandwidth of the ILS laser (12) is preferably entirely included within one of the absorption bands or regions assigned to the intracavity gaseous species being monitored. Thus, within the calibtrated range, the presence of the gaseous species changes the output laser intensity of the ILS laser (12). Consequently, only the intensity of the output of the ILS laser (12) need be monitored in order to quantitatively determine the concentration of the absorbing gaseous species when using the ILS laser method of the present invention.

METHODS AND SYSTEMS FOR CHEMICAL COMPOSITION MEASUREMENT AND MONITORING USING A ROTATING FILTER SPECTROMETER

The invention relates to methods and systems for measuring and/or monitoring the chemical composition of a sample (e.g., a process stream), and/or detecting specific substances or compounds in a sample, using light spectroscopy such as absorption, emission and fluorescence spectroscopy. In certain embodiments, the invention relates to spectrometers with rotating narrow-band interference optical filter(s) to measure light intensity as a function of wavelength. More specifically, in certain embodiments, the invention relates to a spectrometer system with a rotatable filter assembly with a position detector rigidly attached thereto, and, in certain embodiments, the further use of various oversampling methods and techniques described herein, made particularly useful in conjunction with the rotatable filter assembly. In preferred embodiments, the rotatable filter is tilted with respect to the rotation axis, thereby providing surprisingly improved measurement stability and significantly improved ...

PHOTODIODE CONFIGURATIONS FOR SIMULTANEOUS BACKGROUND CORRECTION AND SPECIFIC WAVELENGTH DETECTION

... 13 In a spectrophotometer having photodetectors positioned at fixed wavelengths, the photodetector is divided into three subdetectors, a main subdetector on the wavelength of interest and two background subdetectors located on each side of the main subdetector, the background subdetectors together having area equal to that of the main subdetector, the background subdetectors being connected in polarity reverse that of the main subdetector to correct for changes in background radiation.

Procédé d'obtention du tracé du profil spectral d'une source lumineuse et spectromètre électrooptique pour la mise en oeuvre du procédé

Colorimètre pour mesurer les caractéristiques de couleur d'un objet

Leistungs-Regelvorrichtung für zwei oder mehrere Hydropumpen

Gitter-Spektrophotometer

Verfahren und Einrichtung zur automatischen Anzeige des Spektrums von Objekten

ОБНАРУЖЕНИЕ И АНАЛИЗ МЕТАНА В ФОРМАЦИЯХ МЕТАНОВЫХ УГОЛЬНЫХ ПЛАСТОВ

Представлена измерительная система для проведения измерений в скважине 1 с помощью спектрометра 4. Спектрометр 4 включает источник 5 излучения и детектор 6. Датчик 15 имеет оптическую связь со спектрометром 4 и включает оптический волновод 7 для передачи излучения от источника 5 излучения и по меньшей мере второй оптический волновод для передачи характеристического излучения от образца к детектору 6. Предусмотрено позиционирующее устройство для позиционирования датчика 15 вблизи боковой поверхности 11 ствола 3 скважины и для оптического соединения оптических волноводов 7 с боковой поверхностью 11, при этом датчик 15 может перемещаться вверх и вниз по скважине 1 с помощью направляющей, имеющей подвижное соединение с датчиком 15 и закрепленное положение в устье скважины. Применение устройства и способа согласно изобретению позволяет определять концентрацию метана или другого вещества, представляющего интерес, и тем самым потенциальные запасы метановой формации в угольном пласте. Отчет о международном ...

Spectral imaging of deep tissue

Fast electro-optical spectrometer

ANGULAR DEPTH RESOLVED RAMAN SPECTROSCOPY APPARATUS AND METHOD

An apparatus and method for analyzing a tissue sample to provide depth-selective information includes at least one light source, collection light optics, and a light detector. The light source is configured to produce a light beam having one or more wavelengths of light that cause a tissue sample to produce Raman light signals upon interrogation of the tissue sample. The light beam is oriented to impinge on an exposed surface of the tissue sample at a point of incidence (POI), and oriented so that the light beam enters the tissue sample at an oblique angle relative to the exposed surface of the tissue sample. The collection light optics are configured to collect the Raman light signals emanating from the tissue sample at one or more predetermined lateral distances from the point of incidence. The light detector is configured to receive the Raman light signals from the collection light optics.

CHROMATOGRAPHIC SPECTROPHOTOMETER AND REFERENCE POSITION DETECTION METHOD

A diffraction lattice in this chromatographic spectrophotometer disperses light that has been generated by a light source into light having a plurality of different wavelengths. A sample cell receives light of any one of the wavelengths among the plurality of wavelengths of the light dispersed by the diffraction lattice. A photodetector detects light transmitting through the sample cell. A reference position detection unit: causes a motor to rotate in a first direction by a first angle until the amount of light received by the photodetector reaches or exceeds a predetermined threshold value, and then causes the motor to rotate by a second angle that is smaller than the first angle after the amount of light received by the photodetector has reached or exceeded the threshold value, and thereby detects a rotation angle of the motor at which a peak amount of light received by the photodetector appears; and detects a reference position corresponding to a reference angle of the diffraction lattice ...

СПОСОБ РЕГИСТРАЦИИ СВЕТОВОГО СИГНАЛА, УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ И СПОСОБ СКАНИРОВАНИЯ ОБЪЕКТА

Изобретение относится к фотоэлектронной технике, а именно к технологии регистрации светового сигнала, а также к способам сканирования объектов с использованием данной технологии и может быть использовано, в частности, в различных устройствах для сканирования объектов. Способ регистрации светового сигнала включает разложение светового потока на составляющие спектра, формирование из него когерентного поляризованного светового потока и направление полученного потока на поверхность датчика в виде ПЗС матрицы. Матрица имеет по меньшей мере два слоя фоточувствительных элементов. При этом фотоны светового потока поглощаются фоточувствительными элементами первого относительно их движения слоя матрицы и/или по меньшей мере одного из последующих ее слоев при пробое фотонами предыдущих слоев. При поглощении фотонов фоточувствительные элементы слоев накапливают электрические заряды. При этом разложенный световой поток распределяют по поверхности матрицы с образованием по меньшей мере двух областей, ...

ARRAYED WAVEGUIDE GRATING, BROADBAND LIGHT SOURCE DEVICE, AND SPECTROMETER

... [Problem] To allow for accurate measurement by adding a function for adjusting the amount of light emitted when an arrayed waveguide grating is used for spectrometry. [Solution] Phase differences occur in light transmitted from an entry-side waveguide 12 through a first slab waveguide 13 and then through an arrayed waveguide 14. Due to the phase differences, the light emitted from the arrayed waveguide 14 is focused at different locations at a terminus end surface 151 of a second slab waveguide 15 depending on wavelength, and is then transmitted and emitted through exit-side waveguides 16 having entry ends provided at the respective locations. The entry end of at least one of the exit-side waveguides 16 has a different core width from an exit end of the entry-side waveguide 12, producing a light adjustment effect as well as a wavelength division effect.

Grating ozone spectrophotometer

A holographic grating spectrophotometer for detecting ozone and sulphur dioxide in the atmosphere is described which provides automatic calibration and which provides automatic linearity correction for the photomultiplier tube. Automatic calibration is provided by using a computer to control a stepper motor to move the grating so that the photomultiplier tube receives maximum intensity at the calibration wavelength of 302.1 nm from a mercury source. Automatic linearity correction is obtained by cycling a wavelength selection mask across exit slits located in the focal plane of the device and firstly combines separately taken counts of two different wavelengths and comparing this sum with the sum of counts of these wavelengths taken simultaneously. The difference is used to calculate photomultiplier tube deadtime and improve accuracy of the results. In a preferred embodiment five wavelengths are used to calculate ozone and sulphur dioxide levels, and a stepper motor driving a cylindrical ...

Far-infrared spectroscopy device

This far-infrared spectroscopy device is provided with: a variable wavelength far-infrared light source that generates first far-infrared light; an illuminating optical system that irradiates a sample with the first far-infrared light; a detecting nonlinear optical crystal that converts second far-infrared light into near-infrared light using pump light, said second far-infrared light having been transmitted from the sample; and a far-infrared image-forming optical system that forms an image of the sample in the detecting nonlinear optical crystal. The irradiation position of the first far-infrared light on the sample does not depend on the wavelength of the first far-infrared light.

СПОСОБ КОЛИЧЕСТВЕННОГО ОПРЕДЕЛЕНИЯ С-С-СВЯЗЕЙ В ОРГАНИЧЕСКИХ СОЕДИНЕНИЯХ

Способ измерения длительности сигнала

Способ измерения коэффициента поглощения оптически однородной среды

Способ установки выходной щели на спектральную линию

Корреляционный радиометр

Изобретение относится к технике контроля загрязненности атмосферы, в частности к приборам для измерения общего содержания газов, и может быть использовано для дистанционного измерения общего содержания газа в атмосфере, преимущественно в факелах промышленных предприятий. Цель изобретения - повышение точности измерений . Сущность изобретения заключается в последовательном пропускании через четыре рабочие кюветы, размещенные на диске вращающегося модулятора, излучения прошедшего через исследуемый факел промышленного предприятия по одной оптической трассе нормально к плоскости диафрагмы, интерференционного фильтра и фотоприемника на вход последнего. Обработка выходного электрического сигнала фотоприемника проводится с учетом изменения яркости источника излучения при этом изменение степени поляризации излучения -на входе оптической части устройства не влияет на результаты измерений. В устройстве предусмотрено построение калибровочной кривой по трем точкам с высокой точностью. 1 ил ...

Device for accurate and selective control in relation with a displacement

... 694,536. Machine tool details. COMPAGNIE RADIO CINEMA. May 21, 1951 [May 25, 1950], No. 11788/51. Class 83 (iii). [Also in Groups XXXVII and XL (b)] In apparatus in which a carriage is advanced along a path, at various points in which the carriage is to effect the selection of one of a number of controls, the points are located by a pair of scales parallel to the path, the arrangement being such that the carriage locates a point on the scales and then carries them with it so that one scale selects the appropriate control and the other operates to control the carriage feed. The carriage may effect a number of operations of a machine tool in accordance with a programme set out on the scales. The two scales 18, 12 have a number of slots, scale 12 containing only slots corresponding to those points at which measurements are to be made while scale 18 contains those corresponding to every possible measurement. Attached to the carriage 1 and sliding on a square-sectioned rod 10 is a member 5 having ...

SPECTROPHOTOMETER

Spectrophotometer

... 579,833. Spectrophotometers. COLMAN, E. DE W. Nov. 18, 1943, No. 19286. [Class 97 (i)] [Also in Group XL] In a spectrophotometer a line source of light is combined with a condensing lens, a slit and a diffraction grating between the lens and the slit to give a spectrum in the plane of the slit and means are provided for moving the source of light at right angles to the optic axis to bring light of the desired wavelength into register with the slit together with means for moving the light source parallel to the optic axis to bring the selected wave-band into focus on the slit. As shown, light from a line filament 4 of a prefocused lamp 3, adjustably mounted in its base and fitted on an arm 6 pivoted at 7, is passed through a condensing lens 19 on the exit face of which is secured a diffraction grating 23, preferably an echelette grating, and the spectrum so formed is focused on a slit 21. The wave-band passing through the slit 21 falls on an achromatic collimating lens 24, then through a ...

SPECTROPHOTOMETER WITH OPTICAL FILTERS AND ELECTROSTATIC CATCHES

Method of determining the gas quality

Determination of rock types by spectral scanning

Described herein is a method and system for classifying rock types in a rock body. The method comprises the steps of obtaining spectral data from a spectral measurement (202) of a surface region of the rock body and then determining a first spectral ratio between two wavelength bands of the spectral data. From the first spectral ratio it can be assessed (204) whether the measurement is a high-angle measurement, and if the measurement is not a high-angle measurement then a further spectral ratio between two further wavelength bands of the spectral data is determined (208). The further spectral ratio is then compared (210) with a corresponding diagnostic criterion to assess whether the surface region comprises a first rock type associated with the further spectral ratio and diagnostic criterion.

OPTICAL CHANNEL MONITOR

An optical channel monitor is provided that sequentially or selectively filters an optical channel(s) (11) of light from a (WDM) optical input signal (12) and senses predetermined parameters of the each filtered optical signal (e.g., channel power, channel presence, signal-noise-ratio). The OCM (200) is a free-space optical device that includes a collimator assembly (224), a diffraction grating (214) and a mirror (202). A launch pigtail (220) emits into free space the input signal through the collimator assembly (224) and onto the diffraction grating (214), which separates spatially each of the optical channels (11) of the collimated light, and reflects the sep arated channels of light onto the mirror (202). The mirror reflects the separated light back to the diffraction grating (214), which reflects the channels of light back through the collimating lens. The lens focuses each separated channel of light (.lambda.1 - .lambda.N) at a different focal point in space. One of the optical channels ...

FILTER DEVICE FOR AN OPTICAL MODULE FOR A LAB-ON-A-CHIP ANALYSIS DEVICE, OPTICAL MODULE FOR A LAB-ON-A-CHIP ANALYSIS DEVICE AND METHOD FOR OPERATING AN OPTICAL MODULE FOR A LAB-ON-A-CHIP ANALYSIS DEVICE

The invention relates to a filter device (130) for an optical module for a lab-on-a-chip analysis device. The optical module comprises a light path. The filter device (130) comprises a support element (205), a filter support (210) and a drive device (215). The support element (205) can be mounted in the optical module (100). The filter support (210) is arranged so that it can move on the support element (205). The filter support (210) also has a first filter region (220) and a second filter region (225). The drive device (215) is designed such that the filter support (210) can move between a first position in which the first filter region (220) is arranged in the light path, and a second position in which the second filter region (225) is arranged in the light path.

SPECTROPHOTOMETER

An analyser or spectrophotometer for the detection of material is described with a single source with variable intensity, a single detector having a variable spectral response where the sample is able to be analyzed based on varying the intensity and spectral response. Various methods are described for varying the intensity, and also for varying the spectral response.

BACKGROUND CORRECTION METHOD FOR USE IN GAS CHROMATOGRAPHY

... 19 A method of correcting for background changes in a plasma emission detector comprising a photodetector array is disclosed. In the photodetector array a plurality of sensors are used to detect the emission lines from a discrete number of selected elements including carbon. It is shown that, to the first order, there is a correlation between the response at detectors other than the carbon detector with the response at a carbon detector. The exact extent of this correlation is highly dependent on the amount of nitrogen present in the carrier gas used in the system. A calibration curve can be generated which allows compensation at a frequency of interest as a function of the magnitude of the carbon signal. This curve will depend on the level of nitrogen in the carrier gas and can be empirically determined each time a new bottle of gas is connected to the system. In a preferred embodiment, the calibration curve is not referred to until the carbon response reaches a preselected threshold value ...

СПОСІБ ОЦІНКИ ЕФЕКТИВНОСТІ БІОЛОГІЧНОЇ ДІЇ ДЖЕРЕЛА УЛЬТРАФІОЛЕТОВОГО ВИПРОМІНЮВАННЯ

Спосіб оцінки ефективності біологічної дії джерела ультрафіолетового (УФ) випромінювання включає визначення ширини спектральної характеристики джерела УФ випромінювання, подвійне інтегрування спектральної характеристики УФ випромінювання, введення коефіцієнта і оцінку ефективності біологічної дії джерела УФ випромінювання.

INFRA?RED SPECTROMETERS

System and Method for Cross Sectional Monitoring usig Spatio-temporal Hyperspectral Images

BROADBAND PULSED LIGHT SOURCE DEVICE, SPECTROMETRY DEVICE, SPECTROMETRY METHOD, AND SPECTROSCOPIC ANALYSIS METHOD

... [Problem] To provide a broadband pulsed light source device which has excellent performance, and which solves the problem of residual light in the wavelength region of seed light existing with a high intensity in supercontinuum light (SC light). [Solution] Supercontinuum light is generated by causing a non-linear effect to occur in light from a pulse laser source 1 by means of a non-linear element 2, and residual light at the oscillation wavelength of the pulse laser source 1 is attenuated when the supercontinuum light is split using a dichroic mirror 32. The split light beams are subjected to pulse extension by means of fibers 41, and are combined by means of a wave combining element 33, and the combined light beam is shone onto a target object S. Light that has been transmitted through the target object S is received by a light receiver 6, and an output signal therefrom is converted into a spectrum by a computing means 7.

CONTAMINANT IDENTIFICATION AND CONCENTRATION DETERMINATION BY MONITORING THE INTENSITY OF THE OUTPUT OF AN INTRACAVITY LASER

L'invention concerne un procédé et un appareil pour détecter la présence d'une concentration précise d'une espèce gazeuse à l'intérieur d'un spectre étalonné dans un échantillon gazeux. Le système de détection de gaz laser à intracavité (laser ILS) (10) de la présente invention comprend simplement un laser ILS (12) et un détecteur optique (16). La largeur de bande potentielle ou fonctionnelle des longueurs d'onde du laser ILS (12) est de préférence entièrement incluse dans l'une des bandes ou régions d'absorption attribuées à l'espèce gazeuse intracavité observée. A l'intérieur de la gamme calibrée la présence de l'espèce gazeuse change l'intensité de sortie du laser ILS (12). Par conséquent, on ne doit surveiller que l'intensité de sortie du laser ILS (12) afin de déterminer quantitativement la concentration des espèces gazeuses absorbantes lors de l'utilisation du procédé à laser ILS de cette invention.

Cathode-ray tube spectrograph

Spectral imaging camera and applications

There is provided a method for analyzing optical properties of an object, including utilizing a light illumination having a plurality of amplitudes, phases and polarizations of a plurality of wavelengths impinging from the object, obtaining modified illuminations corresponding to the light illumination, applying a modification to the light illumination thereby obtaining a modified light illumination, analyzing the modified light illumination, obtaining a plurality of amplitudes, phases and polarizations maps of the plurality of wavelengths, and employing the plurality of amplitudes, phases and polarizations maps for obtaining output representing the object's optical properties. An apparatus for analyzing optical properties of an object is also provided.

DISPERSIVE SPECTROMETRY INSTALLATION WITH MULTI-CHANNEL DETECTION

The invention relates to a spectrometry installation comprising an inlet, optical fiber means suitable for receiving an inlet beam and delivering a spectrally dispersed image of the beam which image is limited to a selected spectral band, a multi-channel detection module receiving said spectral image, and processor means. The optical filter means are provided with a deflector stage. Control means are associated with the optical deflector means to define the spectral band in terms of center frequency and band width, and control means are associated therewith for displacing the spectral image over the detection module. An electronic control unit is provided to control the control means and to control the processor means in a plurality of operating modes, each of which comprises joint control of the selected spectral band, of the displacement of the spectral image, and of the processor means, for the purpose of selectively using a particular set of detector components.

LASER INDUCED BREAKDOWN SPECTROSCOPY INSTRUMENTATION FOR REAL-TIME ELEMENTAL ANALYSIS

A backpack laser-induced breakdown spectroscopy LIBS system to provide rapid in-field elemental analysis of environmental samples important to the safeguarding of special nuclear materials.

Imaging systems and methods

Imaging systems and methods are provided. In one embodiment, an image system is disclosed that comprises a Raman gain medium (20) configured to receive an image from a target area (12) and a tunable laser (18) configured to pump light into the Raman gain medium over a plurality of first wavelengths to induce amplification of the image over a plurality of second wavelengths stokes shifted from the plurality of first wavelengths. The image system further comprises an image detector system (28) that receives and processes the amplified image over the plurality of second wavelengths.

OPTICAL MEASUREMENT METHOD AND SYSTEM

SPECTROSCOPIC APPARATUS

An apparatus comprising: a first light source (11a) configured to emit first light having a first wavelength; a second light source (11 b) configured to emit second light having a second wavelength; a half mirror (61) configured to penetrate the emitted first light and the second light; a scanning portion (51) configured to radiate the penetrated first light and the penetrated second light to a target, a scanning angle of the scanning portion changes so that the radiated first light and the radiated second light scans in 2-dimensional directions; a light receiving portion (17) configured to receive (i) first reflected light obtained by the first light being reflected by the target and (ii) second reflected light obtained by the second light being reflected by the target, the first reflected light and the second reflected light are received after being reflected by the half mirror; and a distance measuring portion (91) configured to measure a distance to the target based on a time until ...

Spectroanalysis

A spectroanalytical method includes the steps of exciting material to spectroemissive levels, dispersing radiation from the excited sample material into a spectrum, positionally locating a reference constituent of the excited material in the spectrum, the reference constituent having a known wavelength offset from an element of interest in the sample material to be analyzed, and then shifting the known wavelength offset by an essentially hysteresis free mechanism and making an analytical measurement at that wavelength offset position of radiation produced by a spectrum from sample material that has been excited to spectroemissive levels.

A DETECTOR SYSTEM COMPRISING A PLURALITY OF LIGHT GUIDES AND A SPECTROMETER COMPRISING THE DETECTOR SYSTEM

УСТРОЙСТВО РЕГИСТРАЦИИ ИЗМЕНЕНИЯ СПЕКТРОВ ОПТИЧЕСКОГО ИЗЛУЧЕНИЯ

Устройство регистрации изменения спектров оптического излучения, содержащее диспергирующее устройство, на вход которого подается сигнал от контролируемого источника излучения и разлагающее входной оптический сигнал от источника излучения в сплошной спектр, изображение которого попадает на управляемый многоэлементный фотоприемник, соединенный с входом блока управления и регистрации сигналов фотоприемника, отличающееся тем, что в качестве фотоприемника используется КМОП-матрица с бегущим электронным затвором, расположенная таким образом, что строки КМОП-матрицы перпендикулярны входной щели диспергирующего устройства, а выход блока управления и регистрации сигналов фотоприемника соединен с блоком синхронизации, управляющим процессами включения и выключения источника излучения, а также процессами регистрации сигналов фотоприемника.

ПОЛИХРОМАТОР

Изобретение относится к средствам измерения интенсивности и спектрального состава инфракрасного, видимого или ультрафиолетового излучения и может быть использовано для излучения оптических свойств и состава атмосферы. Сущность: полихроматор содержит сканирующее устройство, входную оптику, диспергирующий элемент, селектор длин волн, линейку выходных щелей, выходную оптику и фотодетектор, причем выходная оптика содержит ряд призматических линз, установленных напротив выходных щелей и параллельно включенных в оптическую связь между линейкой выходных щелей и фотодетектором. В частности, призматические линзы могут быть выполнены в виде призм с плоскими поверхностями. 1 з.п. ф-лы, 3 ил.

Прибор для спектрального анализа излучения от объектов

Изобретение относится к области спектрального анализа и касается прибора для спектрального анализа излучения от объектов. Прибор содержит последовательно соединенные оптический блок с объективом, оптический фильтр, ПЗС-матрицу, аппаратуру цифровой обработки и систему отображения. Оптический фильтр представляет собой поворачивающийся многогранный барабан с зеркалами, на которые нанесены прозрачные покрытия различной толщины h. Угол наклона зеркал по отношению к потоку излучения i задается за счет изменения числа граней барабана p и определяется из соотношения i=360/р. Длина волны спектра, измеренного с помощью каждого зеркала, определяется из соотношения: λ=4h(n-sini)/3, где n - показатель преломления материала покрытия. Устройство вращения барабана соединено с аппаратурой цифровой обработки через блок синхронизации. Технический результат заключается в повышении чувствительности и разрешающей способности устройства. 2 ил.

Способ измерения скорости самостоятельно светящихся объектов по доплеровскому смещению спектральной линии

Спектрометр для регистрации распределения интенсивностей в спектре

Способ спектрального анализа вещества

Способ создания температурных градиентов в водной среде

Verfahren zum Auswerten einer spektralen Energieverteilung

VORRICHTUNG ZUR MESSUNG VON OPTISCHEN WELLENLÄNGEN

SPECTROPHOTOMETER

Improvements in methods of and systems for spectrochemical analysis

... 731,942. Photo-electric spectrometer. LEEDS & NORTHROP CO. July 30, 1952 [Feb. 4, 1952], No. 19276/52. Class 40 (3). In a recording spectrometer of the type in which the light source is an electric spark between electrodes consisting of the material under examination, the detector is made sensitive to the radiation for a period in the interval between the initiation of successive sparks. This is said to enable the apparatus to be so adjusted as to eliminate air lines and background " noise " and to enable the " arc " lines to be distinguished from " spark " lines. Fig. 4A shows the output of a spectrometer of which the intensity is uniform over the period between sparks. BL represents the background level, I the arc lines and X spark lines. If the sensitivity of the system is high only for the first few seconds of the spark period the arc lines become negligible whereas if the initiation of detector response is delayed for 15 microseconds (Fig. 4E) the arc lines become prominent, spark ...

Improvements in multiple slit spectrograph for direct reading spectrographic analysis

... 732,058. Spectrometers. LEEDS& NORTHRUP CO. July 28, 1952 (Aug. 10, 1951], No. 19021/52. Class 97 (1). [Also in Group XL (b)] In a photo-electric spectrometer for determining the peak intensities of predetermined spectral lines in which radiant energy passes between a collimating and dispersing element the radiant energy falls on one of said elements through an aperture defining structure and passes to a second such structure from the other element, means co-operating with one of the structures to select a spectral line and further means with the other to scan the selected line to determine its peak intensity. As shown, (Fig. 6), light produced by a spark passing between electrodes 13 of the material to be analysed passes through a slit 14 to a concave collimating mirror 15 from which it is reflected through a slit 14 to a concave collimating mirror 15 from which it is reflected on a concave diffraction grating 16, the spectrum produced being reflected by plane mirror 34 on to a disc 35 ...

DEVICE FOR THE MEASUREMENT OF OPTICAL WAVELENGTHS

SPECTROMETER ARRANGEMENT

HYPER+SPECTRAL PICTURE VERSION FOR THE REGULATION OF OBJECT CHARACTERISTICS WITH RÜCKPROJEKTION OF THE PICTURE ON THE OBJECT

Optical spectrometer for detecting spectra in separate ranges

Spectroscopic system and method therefor

A spectroscopic system may include: a probe having a probe tip and an optical coupler, the optical coupler including an emitting fiber group and first and second receiving fiber groups, each fiber group having a first end and a second end, wherein the first ends of the fiber groups are formed into a bundle and optically exposed through the probe tip; a light source optically coupled to the second end of the emitting fiber group, the light source emitting light in at least a first waveband and a second waveband, the second waveband being different from the first waveband; a first spectrometer optically coupled to the second end of the first receiving fiber group and configured to process light in the first waveband; and a second spectrometer optically coupled to the second end of the second receiving fiber group and configured to process light in the second waveband.

APPARATUS AND METHOD FOR INSPECTION OF A FILM ON A SUBSTRATE

Methods of and apparatus for inspecting composite layers of a first material formed on a second material are provided including providing an illumination source, illuminating at least a portion of the composite at the layer, receiving light reflected from the sample, determining a spectral response from the received light, and comparing the received spectral response to an expected spectral response.

Apparatus for chemical analyses by spectral way

POWER CONTROL DEVICE FOR TWO OR MORE HYDRAULIC PUMPS

Spectrograph with cathode-ray tube

DETECTOR SYSTEM COMPRISING A PLURALITY OF LIGHT GUIDES AND A SPECTROMETER COMPRISING A DETECTOR SYSTEM

HYPERSPECTRAL QUANTITATIVE IMAGING CYTOMETRY SYSTEM

The present invention relates to hyperspectral detection of luminescence and, in particular, to the detection of luminescence from solid phase samples which are stimulated with radiation sources.

PULSE-TYPE DELAY DISPERSION SPECTRUM MEASUREMENT METHOD AND APPARATUS, AND SPECTRAL IMAGING METHOD AND APPARATUS

A pulse-type delay dispersion spectrum measurement method and apparatus, and a spectral imaging method and apparatus. The spectrum measurement method comprises: S1, exciting, by means of a pulse laser, a sample to be tested, and generating an instantaneous spectrum; S2, performing delay processing on different photons in the instantaneous spectrum in terms of time, and successively separating same according to a time series; and S3, using a high-speed and high-sensitivity photoelectric detector to detect photons that appear over time in the spectrum. An instantaneous pulse is used to excite a sample, spectrums excited from the sample are concentrated into a time period between excitation light pulses, and a single-channel high-sensitivity photoelectric detector is then used to realize high-efficiency direct measurement of the spectrums spread in terms of time, such that for the measurement of the spectrums, there is no need to depend on a multi-channel detection device. Not only can all ...

Источник оптического излучения с согласованным спектром для измерения концентрации молекул метана в атмосфере

Полезная модель относится к области оптических измерений и касается источника оптического излучения с согласованным спектром для измерения концентрации молекул метана в атмосфере.Источник излучения включает в себя корпус, светоизлучающий элемент, блок питания, устройство регулирования тока, текущего через светоизлучающий элемент, оптические элементы для управления геометрическими и спектральными характеристиками пучка, дифракционную решетку эшелле и средства ее позиционирования. При этом в освещающем дифракционную решетку параллельном пучке размещена ограничивающая его апертурная диафрагма ромбической формы, диагональ которой параллельна штрихам решетки.Технический результат заключается в повышении надежности обнаружения и точности определения концентрации молекул метана. 2 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 169 833 U1 (51) МПК G01J 3/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21)(22) Заявка: 2016114757, 15.04.2016 (24) Дата начала отсчета срока действия патента: 15.04.2016 (72) Автор(ы): Иванов Михаил Павлович (RU), Толмачев Юрий Александрович (RU) 04.04.2017 Приоритет(ы): (22) Дата подачи заявки: 15.04.2016 Адрес для переписки: 199034, Санкт-Петербург, Университетская наб., 7/9, Университет, Управление-Центр интеллектуальной собственности и трансфера технологий, Матвееву А.А., Матвеевой Т.И. (56) Список документов, цитированных в отчете о поиске: RU 2287736 C2, 20.11.2006. US 2006146326 A1, 06.07.2006. US 5751420 A1, 12.05.1998. US 2003197861 A1, 23.10.2003. U 1 1 6 9 8 3 3 R U (57) Формула полезной модели Источник оптического излучения с согласованным спектром для измерения концентрации молекул метана в атмосфере, содержащий корпус, светоизлучающий элемент, блок питания с устройствами, обеспечивающими возможность регулирования тока, текущего через светоизлучающий элемент, оптические элементы для управления геометрическими и спектральными характеристиками пучка, ...

Method and apparatus for measuring a spectrum of an optical sensor, advantageously in the infrared region

A method for measuring a spectrum of an optical sensor, advantageously in the infrared region, in which a light beam impinges on an optical sensor in contact with a medium to be measured, wherein the optical sensor transmits a measurement beam changed by the medium to be measured and the measurement beam is fed to a pyrodetector, which issues output signals corresponding to the spectrum. The intensity of the measurement signal is modulated before impinging on a pyrodetector. In order to provide a cost effective, vibration free measuring apparatus, which has a long lifetime, intensity modulation of measurement beam occurs by tuning-in wavelengths contained in the optical spectrum of measuring beam.

Optical fiber measurement device and measurement method using same

Disclosed is a highly reliable optical fiber measurement device and measurement method having a simple and compact structure. The device includes a planar liquid holder having a plurality of liquid holding portions arranged along a flat face; a plurality of light receiving optical fibers for transmitting fluorescence generated in the liquid holding portions; a plurality of light emitting optical fibers for transmitting excitation light into the liquid holding portions; a measurement head capable of being positioned in the each liquid holding portion while supporting a plurality of measurement ends having a bundle of one light receiving end of the light receiving optical fibers and one light emitting end of light emitting optical fibers; a light reception selecting element that, by sequentially selecting one by one from plural the light receiving optical fibers and sequentially selecting one by one from plural kinds of wavelength or wavelength bands, sequentially guides the light of the selected wavelength or wavelength band of the fluorescence received by the selected light receiving optical fibers to one photoelectric element; and a photoelectric element for sequentially conducting photoelectric conversion on the guided fluorescence.

Spectrometer

A spectrometer includes a light source section that includes a plurality of LEDs having different emission wavelengths, a variable wavelength interference filter that selectively extracts light of a predetermined wavelength, a detector that detects the amount of light, and a control circuit section. The control circuit section includes a mode switching section that switches a calibration mode and a measurement mode, an outside light analysis section that analyzes characteristics of outside light in the calibration mode, a reference light setting section that set the amount of light emitted from each of the LEDs on the basis of the characteristics of the outside light, and a light source driving section that drives each of the LEDs on the basis of the amount of light emitted which is set in the measurement mode.

SPARK CHAMBER FOR OPTICAL EMISSION ANALYSIS

A spark chamber for an optical emission analyser, comprising: a gas inlet located on a first side of the spark chamber for supplying a gas into the spark chamber; and a gas outlet located on a second side of the spark chamber arranged to convey the gas from the spark chamber; wherein an elongated electrode having an electrode axis generally along the direction of elongation is located within the spark chamber; and wherein: the first and second sides of the spark chamber lie at either side of the elongated electrode in directions generally perpendicular to the electrode axis; there is a gas flow axis through the spark chamber between the gas inlet and the gas outlet; and on passing along the gas flow axis from the gas inlet to the gas outlet the unobstructed internal cross sectional area of the spark chamber perpendicular to the gas flow axis remains constant to within a factor A, wherein A lies between 1.0 and 2.0. 2. The spark chamber of wherein A lies between 1.0 and an upper limit selected from one of the following: 1.9 claim 1 , 1.8 claim 1 , 1.7 claim 1 , 1.6 claim 1 , 1.5 claim 1 , 1.4 1.3 claim 1 , 1.2 and 1.1.3. The spark chamber of wherein the spark chamber contains a component shaped so as to make the unobstructed internal cross sectional area of the spark chamber perpendicular to the gas flow axis constant to within the factor A.4. The spark chamber of wherein the component is an insulator substantially surrounding the elongated electrode.5. The spark chamber of wherein the insulator is not rotationally symmetric about the electrode axis.6. The spark chamber of wherein the insulator has a height which increases on travelling along the gas flow axis from the gas inlet to the elongated electrode and decreases on travelling along the gas flow axis from the elongated electrode to the gas outlet.7. The spark chamber of claim 1 , wherein the internal volume of the spark chamber is substantially cylindrical claim 1 , the spark chamber having curved walls claim 1 ...

Compact, Low Cost Raman Monitor For Single Substances

Apparatus for performing Raman spectroscopy may include a first laser source having a first emission wavelength and a second laser source having a second emission wavelength. A separation between the first and second emission wavelengths may correspond to a width of a Raman band of a substance of interest. An optical switch may provide switching between the first and second laser sources. An ensemble of individually addressable laser emitters may be provided. A Bragg grating element may receive laser light from the ensemble. An optical system may direct light from the Bragg grating element into an optical fiber. A combined beam through the optical fiber may contain light from each of the emitters. 1. Apparatus for performing Raman spectroscopy , the apparatus comprising:a first laser source having a first emission wavelength;a second laser source having a second emission wavelength, wherein a separation between the first and second emission wavelengths corresponds to a width of a Raman band of a substance of interest; andan optical switch that provides switching between the first and second laser sources.2. The apparatus of claim 1 , wherein the optical switch provides the switching between the first and second laser sources such that light emitted from the first and second laser sources is emitted alternatingly via an output port of the optical switch.3. The apparatus of claim 2 , wherein the optical switch has internal beam dump in a neutral position.4. The apparatus of claim 3 , comprising a first optical fiber that couples the first laser source to a first input port of the optical switch.5. The apparatus of claim 4 , comprising a second optical fiber that couples the second laser source to a second input port of the optical switch.6. The apparatus of claim 3 , comprising an output optical fiber that couples the optical switch to a Raman analysis system.7. The apparatus of claim 6 , wherein the output optical fiber is coupled to an output port of the optical ...

AUTOMATIC REAL-TIME WAVELENGTH CALIBRATION OF FIBER-OPTIC-BASED SPECTROMETERS

A system comprising a calibration light source is described. The system includes a calibration optical fiber coupled to an output of the calibration light source and to an input slit of a spectrometer. The calibration optical fiber transmits light output of the calibration light source to the spectrometer via the slit. An input optical fiber is coupled to the input slit in addition to the calibration optical fiber. The input optical fiber transmits light-under-test to the spectrometer via the slit. 1. A system comprising:a calibration light source;a calibration optical fiber coupled to the calibration light source and to an input slit of a spectrometer, wherein the calibration optical fiber transmits a first light output of the calibration light source to the spectrometer via the input slit; andan input optical fiber coupled to a test light source and to the input slit, wherein the input optical fiber transmits a second light output of the test light source to the spectrometer via the input slit.2. The system of claim 1 , wherein the input slit controls a wavelength resolution of the spectrometer.3. The system of claim 1 , wherein the input slit restricts a lateral width of light entering the spectrometer.4. The system of claim 1 , wherein a center of the calibration optical fiber is laterally aligned along a midpoint of the input slit.5. The system of claim 1 , wherein a center of the input optical fiber is laterally aligned along a midpoint of the input slit.6. The system of claim 1 , wherein the calibration optical fiber is positioned adjacent to the input optical fiber.7. The system of claim 1 , wherein a center of the calibration optical fiber is laterally aligned along a midpoint of the input slit claim 1 , and a center of the input optical fiber is laterally aligned along a midpoint of the input slit.8. The system of claim 7 , wherein the calibration optical fiber is positioned adjacent to the input optical fiber.9. The system of claim 1 , comprising a fiber ...

CORRECTION OF SECOND-ORDER DIFFRACTION EFFECTS IN FIBER-OPTIC-BASED SPECTROMETERS

Embodiments described herein correct errors in spectrometer outputs due to the presence of second-order light. Embodiments determine a relationship between first-order light and second-order light of the spectrometer output. The relationship is a function of wavelength and an output of the spectrometer due to the first-order light. The relationship is used to determine an estimated contribution of the second-order light to the output. Spectrometer errors introduced by the second-order light are corrected by adjusting the spectrometer output according to the estimated contribution of the second-order light. 1. A system comprising:a spectrometer; andan illumination source coupled to the spectrometer, wherein a relationship is determined between first-order light output and second-order light output of the spectrometer, wherein the relationship is a function of wavelength and first-order light output of the spectrometer, wherein an estimated contribution of the second-order light output of the spectrometer is determined with the relationship, wherein spectrometer errors introduced by the second-order light output are corrected by adjusting the spectrometer output according to the estimated contribution.2. The system of claim 1 , wherein a wavelength range that comprises second-order light is determined for the illumination source.3. The system of claim 2 , wherein the relationship comprises a ratio of a second-order output to a first-order output.4. The system of claim 3 , wherein the ratio is determined for a plurality of discrete wavelengths within a wavelength range.5. The system of claim 3 , wherein the estimated contribution is determined by calculating with use of the ratio the expected amount of second-order light.6. The system of claim 5 , wherein the estimated contribution is calculated by multiplying the ratio by the first-order output.7. The system of claim 5 , wherein the estimated contribution is determined for a plurality of discrete wavelengths within ...

TUNABLE MULTISPECTRAL LASER SOURCE

An tunable optical frequency comb source includes a linear waveguide having an input leg to couple to a pump laser. A ring microresonator is evanescently coupled to the linear waveguide. The microresonator includes a ring shaped waveguide having a core material with a nonlinear refractive index to provide four-wave mixing to generate a cascade of independent laser beams at frequencies corresponding to the longitudinal modes of the microresonator. 1. A tunable optical frequency comb source comprising:a linear waveguide having an input leg to couple to a pump laser;a ring microresonator evanescently coupled to the linear waveguide, the microresonator including a ring shaped waveguide having a core material with a nonlinear refractive index to provide four-wave mixing to generate a cascade of independent laser beams at frequencies corresponding to the longitudinal modes of the microresonator, wherein one of the cascade of independent laser beams is tuned to a specified frequency corresponding to a frequency of the pump laser based on an operating temperature of the ring microresonator that modifies an optical path length of the ring microresonator.2. The tunable optical frequency comb source of wherein a portion of radiant power in the cascade of independent laser beams is evanescently coupled into an output leg of the linear waveguide.3. The tunable optical frequency comb source of wherein each of the linear waveguide and the ring microresonator are mounted on independent Peltier devices.4. The tunable optical frequency comb source of wherein the core material comprises high resistivity silicon.5. The tunable optical frequency comb source of wherein the core material includes at least one of silicon dioxide and gallium arsenide.6. The tunable optical frequency comb source of and further comprising:first optics to receive laser beams provided by the ring microresonator;second optics to direct the laser beams toward an object and receive reflected radiation from the ...

SCANNER PHOTOMETER & METHODS

A scanning photometer and attendant methods are provided. The scanning photometer is generally characterized by first and second fluorophore excitation sources, an objective lens, and a common emission detector for the detection of first and second fluorophore emission originating from the excitation of the fluorophores via passage of excitation energy, via an optical path of the objective lens, from the excitation sources. Excitation energy and emission energy conditioning elements are likewise provided, operatively interposed before or after the objective lens as the case may be. 134-. (canceled)35. A photometric scanning system comprising a photometer and a scanning rail carriage , said photometer operatively supported by said scanning rail carriage for reversible travel with respect to a scanning region within which an optical target is positionable , said photometer comprising:a. a first fluorophore excitation source;b. a second fluorophore excitation source;c. an objective lens, characterized by an optical path, through which excitation energy from said first and said second fluorophore excitation sources pass; and,d. a first emission detector for detecting both a first fluorophore emission originating from excitation of a first fluorophore and a second fluorophore emission originating from excitation of a second fluorophore.3635. The photometric scanning system of claim further comprising a third fluorophore excitation source , excitation energy from said third fluorophore excitation source passing through said objective lens.37. The photometric scanning system of further comprising a third fluorophore excitation source and a second emission detector for detecting a third fluorophore emission originating from excitation of a third fluorophore.38. The photometric scanning system of further comprising excitation energy conditioning elements operatively interposed between said first and second excitation sources and said objective lens.39. The photometric ...

Method and System for Optical Spectroscopy

Two dimensional (2D) optical spectroscopy, wherein the spectrum has an excitation and an emission axis, reveals information formerly hidden in one-dimensional (1D) optical spectroscopy. However, current two dimensional optical spectroscopy systems are complex laboratory arrangements and accordingly limited in deployment. According to embodiments of the invention a monolithic platform providing significantly reduced complexity and increased robustness is provided allowing for “black-box” modules allowing commercial deployment of 2D optical spectroscopy instruments. Additionally, the invention supports high pulse repetition rates as well as one quantum and two quantum measurements under electronic control. 1. A method comprising:receiving from an optical source a plurality of pulses, each pulse characterized by a profile relating to at least one of frequency, phase, polarization and time;coupling the pulse to a pair of pulse shapers to generate a pair of modified pulses, each pulse shaper being able to modify the profile of the pulse in at least one aspect; in the first position the combiner establishes a pump-probe configuration of characterizing the sample, and', 'in the second position the combiner establishes a collinear configuration of characterizing the sample., 'coupling the pair of modified pulses to a sample via a combiner positionable between a first position and a second position, wherein'}2. The method according to wherein claim 1 ,at least one pulse shaper of the pair of pulse shapers is an acousto-optic programmable dispersive filter.3. The method according to wherein claim 1 ,the pulse shapers allow modification of the pulse shape between sequential groups of a plurality N of pulses which provide N−1 pump pulses and a single probe pulse.4. The method according to further comprising:coupling the optical pulses after their coupling to the sample to a polarization analyser supporting simultaneous determination of quadrature components of linear and ...

COMPACT, LOW COST RAMAN MONITOR FOR SINGLE SUBSTANCES

Apparatus for performing Raman spectroscopy may include a first laser source having a first emission wavelength and a second laser source having a second emission wavelength. A separation between the first and second emission wavelengths may correspond to a width of a Raman band of a substance of interest. A switch may provide switching between the first and second laser sources. An ensemble of individually addressable laser emitters may be provided. A Bragg grating element may receive laser light from the ensemble. An optical system may direct light from the Bragg grating element into an optical fiber. A combined beam through the optical fiber may contain light from each of the emitters. 1. Apparatus for performing Raman spectroscopy , the apparatus comprising:a first laser source having a first emission wavelength;a second laser source having a second emission wavelength, wherein a separation between the first and second emission wavelengths corresponds to a width of a Raman band of a substance of interest; anda switch that provides switching between the first and second laser sources.2. The apparatus of claim 1 , wherein the switch provides the switching between the first and second laser sources such that light emitted from the first and second laser sources is emitted alternatingly via an output port of the switch.3. The apparatus of claim 2 , wherein the switch has internal beam dump in a neutral position.4. The apparatus of claim 3 , comprising a first optical fiber that couples the first laser source to a first input port of the switch.5. The apparatus of claim 4 , comprising a second optical fiber that couples the second laser source to a second input port of the switch.6. The apparatus of claim 3 , comprising an output optical fiber that couples the switch to a Raman analysis system.7. The apparatus of claim 6 , wherein the output optical fiber is coupled to an output port of the switch.8. The apparatus of claim 6 , wherein the output optical fiber couples ...

FREQUENCY COMB SOURCE WITH LARGE COMB SPACING

A frequency comb laser providing large comb spacing is disclosed. At least one embodiment includes a mode locked waveguide laser system. The mode locked waveguide laser includes a laser cavity having a waveguide, and a dispersion control unit (DCU) in the cavity. The DCU imparts an angular dispersion, group-velocity dispersion (GVD) and a spatial chirp to a beam propagating in the cavity. The DCU is capable of producing net GVD in a range from a positive value to a negative value. In some embodiments a tunable fiber frequency comb system configured as an optical frequency synthesizer is provided. In at least one embodiment a low phase noise micro-wave source may be implemented with a fiber comb laser having a comb spacing greater than about 1 GHz. The laser system is suitable for mass-producible fiber comb sources with large comb spacing and low noise. Applications include high-resolution spectroscopy. 1. A mode locked waveguide laser system , comprising:a mode locked waveguide laser comprising a laser cavity having a waveguide;an intra-cavity beam emitted from said waveguide; a dispersion control unit (DCU) disposed in said cavity and in an optical path of said intra-cavity beam, wherein said laser cavity is configured in such a way that said intra-cavity beam is redirected to said waveguide after traversing at least said DCU, wherein said DCU imparts angular dispersion, and group-velocity dispersion (GVD) to said intra-cavity beam during propagation in said cavity, and imparts a spatial chirp to said redirected beam, wherein said DCU is capable of producing net GVD in a range from a positive value to a negative value.2. The mode locked waveguide laser system according to claim 1 , wherein said mode locked waveguide laser comprises a mode locked fiber laser.3. The mode locked waveguide laser system according to claim 1 , further comprising: means for control of the carrier envelope offset frequency of said mode locked waveguide laser.4. The mode locked waveguide ...

METHOD AND APPARATUS FOR ANALYZING, IDENTIFYING OR IMAGING A TARGET

An apparatus for analyzing, identifying or imaging an target including first and second laser beams coupled to a pair of photoconductive switches to produce CW signals in one or more bands in a range of frequencies greater than 100 GHz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral heterodyne process to generate an electrical signal representative of some characteristics of the target. The lasers are tuned to different frequencies and a frequency shifter in the path of one laser beam allows the terahertz beam to be finely adjusted in one or more selected frequency bands. 1. A method for analyzing , identifying , or imaging a target , said method comprising:providing first and second lasers having tunable frequencies, said first laser to produce a first output beam and said second laser to produce a second output beam, said first output beam and said second output beam having different frequencies; which may be coarsely adjusted by temperature adjustment of one of said lasers;producing a first composite output beam from a first portion of said first output beam and a first portion of said second output beam;coupling a second portion of the first output beam to a frequency control element for controllably finely adjusting the frequency of the second portion of the first output beam;producing a second composite output beam from the frequency adjusted second portion of said first output beam and a second portion of said second output beam;generating CW signals in the range of frequencies from 100 GHz to over 2 THz using said first second composite output beam;causing said CW signals to be substantially simultaneously focused on or through said target;acquiring a spectral information signal from said target; andgenerating an electrical signal representative of a characteristic of said target based on said spectral information signal and ...

Spectrometer Apparatus and a Corresponding Method for Operating a Spectrometer Apparatus

A spectrometer apparatus is disclosed that includes at least one light source for irradiating a sample with light, an optical detection device for detecting light scattered by the sample, at least one optical filter device, which is arranged in front of and/or behind the sample, a contact sensor device for determining a contact between the sample and the spectrometer apparatus and for outputting a corresponding output signal, a control device for controlling the light source and the detection device in response to the output signal. The control device is designed such that the control device modifies at least one operating parameter of the light source and the detection device, when the output signal indicates the contact between the sample and the spectrometer apparatus. A method for operating a spectrometer apparatus is disclosed as well. 1. A spectrometer apparatus comprising:at least one light source configured to irradiate a sample with light;an optical detection device configured to detect the light scattered by the sample;at least one optical filter device arranged in front of and/or behind the sample,a contact sensor device configured to determine a contact between the sample and the spectrometer apparatus and to output a corresponding output signal;a control device to control the light source and the detection device in response to the output signal;wherein the control device is designed such that it changes at least one operating parameter of the light source and of the detection device if the output signal indicates the contact between the sample and the spectrometer apparatus.2. The spectrometer apparatus as claimed in claim 1 , wherein the control device is designed such that the detection of the spectrum is activated only in the case where contact between the spectrometer apparatus and the sample is present.3. The spectrometer apparatus as claimed in claim 1 , wherein the control device is designed such that the detection of the spectrum is activated ...

OPTICAL MEASUREMENT SYSTEM AND METHOD OF MEASURING LIGHT EMITTED FROM MICRO DEVICE

An optical measurement system is provided. The optical measurement system includes an optical fiber and a photo detecting component. The optical fiber has a first end, a second end opposite to the first end, and an inner cavity recessed from the first end and is configured to accommodate a micro device. The photo detecting component is connected to the second end of the optical fiber and is configured to receive light propagating from the first end of the optical fiber. 1. An optical measurement system , comprising:an optical fiber having a first end, a second end opposite to the first end, and an inner cavity recessed from the first end and configured to accommodate a micro device; anda photo detecting component connected to the second end of the optical fiber and configured to receive light propagating from the first end of the optical fiber.2. The optical measurement system of claim 1 , wherein the photo detecting component comprises a photoelectric transducer.3. The optical measurement system of claim 1 , wherein the photo detecting component comprises an optical spectrometer.4. The optical measurement system of claim 1 , further comprising an alignment component connected to the optical fiber at a position between the first end and the second end and configured to maximize a power of the light received by the photo detecting component.5. The optical measurement system of claim 1 , further comprising a transparent layer in the inner cavity claim 1 , wherein a refractive index of the transparent layer is greater than 1.6. The optical measurement system of claim 1 , wherein a lateral length of the optical fiber is greater than or equal to a lateral length of the inner cavity.7. The optical measurement system of claim 1 , wherein the optical fiber comprises:a core portion; anda cladding layer wrapping the core portion and configured to confine the light to propagate within the core portion.8. The optical measurement system of claim 7 , wherein a refractive index of ...

Accessories for handheld spectrometer

A protective sheath having a closed end and an open end is sized to receive a hand held spectrometer. The spectrometer can be placed in the sheath to calibrate the spectrometer and to measure samples. In a calibration orientation, an optical head of the spectrometer can be oriented toward the closed end of the sheath where a calibration material is located. In a measurement orientation, the optical head of the spectrometer can be oriented toward the open end of the sheath in order to measure a sample. To change the orientation, the spectrometer can be removed from the sheath container and placed in the sheath container with the calibration orientation or the measurement orientation. Accessory container covers can be provided and placed on the open end of the sheath with samples placed therein in order to provide improved measurements.

System and method for indicating the presence of mammalian blood or other mammalian bodily fluid

A system and method of indicating the presence of mammalian blood or other mammalian bodily fluid includes receiving ambient air at an air inlet of a hand-held sensing device and sensing a chemical component of mammalian blood or other mammalian bodily fluid in the ambient air at a sensor disposed near the air inlet of the sensing device. The system and method includes using an electronic control circuit to determine the presence of the chemical component by discriminating the chemical component of mammalian blood or other mammalian bodily fluid from other odors in the ambient air and providing an audible and/or visual and/or vibrator indication when the presence of the chemical component is determined.

RECONFIGURABLE SPECTROSCOPY SYSTEM

A reconfigurable spectroscopy system comprises tunable lasers and wavelength lockers to lock to accurate reference wavelengths. Band combiners with differently optimized wavelength ranges multiplex the optical signal over the time domain, to emit a plurality of reference wavelengths for spectroscopy applications. The power requirements are greatly reduced by multiplexing over the time domain in time slots which do not affect sampling and receiving of the spectroscopy data. 1. A device comprising:a plurality of tunable lasers generating a plurality of wavelengths;a plurality of wavelength lockers to reduce wavelength noise from the plurality of wavelengths;a plurality of band combiners each configured to combine a different wavelength range than other band combiners of the plurality of band combiners;a plurality of switches, each switch receiving an output of a corresponding band combiner of the plurality of band combiners, each switch outputting a plurality of switched wavelengths;a plurality of broadband combiners receiving outputs of the plurality of switches; anda plurality of emitters to emit a plurality of reference wavelengths, each emitter receiving an output of a corresponding broadband combiner of the plurality of broadband combiners.2. The device of claim 1 , wherein each wavelength locker of the plurality of wavelength lockers is between a tunable laser of the plurality of tunable lasers and a band combiner of the plurality of band combiners.3. The device of claim 1 , wherein the plurality of wavelength lockers comprises a plurality of optical channel monitors located after the plurality of band combiners claim 1 , and feeding back to the plurality of tunable lasers.4. The device of claim 1 , wherein each band combiner of the plurality of band combiners is configured to operate within a wavelength range of 100 nm.5. The device of claim 1 , wherein each wavelength locker of the plurality of wavelength lockers comprises feed-forward or feedback noise ...

Reference Switch Architectures for Noncontact Sensing of Substances

This relates to systems and methods for measuring a concentration and type of substance in a sample at a sampling interface. The systems can include a light source, optics, one or more modulators, a reference, a detector, and a controller. The systems and methods disclosed can be capable of accounting for drift originating from the light source, one or more optics, and the detector by sharing one or more components between different measurement light paths. Additionally, the systems can be capable of differentiating between different types of drift and eliminating erroneous measurements due to stray light with the placement of one or more modulators between the light source and the sample or reference. Furthermore, the systems can be capable of detecting the substance along various locations and depths within the sample by mapping a detector pixel and a microoptics to the location and depth in the sample. 120-. (canceled)21. A system for taking a measurement , comprising:a light source configured to output light to a sample;a first output region located at an interface of the system and configured to receive a first light from a first location within the sample;a second output region located at the interface of the system and configured to receive a second light from a second location within the sample;a detector; and first optics configured to receive the first light from the first output region and direct the first light from the first output region to the detector; and', 'second optics configured to receive the second light from the second output region and direct the second light from the second output region to the detector., 'an optics unit, comprising22. The system of claim 21 , further comprising a reference claim 21 , wherein:the light comprises is output to the sample and to the reference; and receive the second light from the reference; and', 'direct the second light to the detector., 'the optics unit further comprises third optics configured to23. The ...

DISCOVERING AND CONSTRAINING IDLE PROCESSES

A spectroscopy system and method includes illuminating a target with a wideband light pulse that includes an entire testing wavelength spectrum. The light pulse is transformed with a dispersive medium to introduce a frequency-based time delay to the light pulse after the light pulse has interacted with a target. The dispersed light pulse is converted to a time-domain electrical signal with a photodiode. The time-domain electrical signal is converted into a spectral profile of the target. 1. A spectroscopy system , comprising:a wideband light source configured to emit a light pulse that includes an entire testing wavelength spectrum;a dispersive medium configured to introduce a frequency-based time delay to the light pulse after the light pulse has interacted with a target;a photodiode configured to convert the dispersed light pulse to a time-domain electrical signal; andan analysis module configured to convert the time-domain electrical signal into a spectral profile of the target.2. The spectroscopy system of claim 1 , wherein the spectral profile comprises an amplitude response for each wavelength in the testing wavelength spectrum.3. The spectroscopy system of claim 1 , wherein the wideband light source is configured to generate a short-duration light pulse that has wideband wavelength coverage.4. The spectroscopy system of claim 3 , wherein the wideband light source is a laser.5. The spectroscopy system of claim 1 , wherein the dispersive medium comprises a dispersive structure including one of a grating and an optical filter with optical delay lines.6. The spectroscopy system of claim 1 , wherein the dispersive medium comprises one of a crystal claim 1 , an optical lens claim 1 , and an optical waveguide.7. A spectroscopy method claim 1 , comprising:illuminating a target with a wideband light pulse that includes an entire testing wavelength spectrum;transforming the light pulse with a dispersive medium to introduce a frequency-based time delay to the light ...

FIBER-OPTIC MEASUREMENT SYSTEM AND METHODS BASED ON ULTRA-SHORT CAVITY LENGTH FABRY-PEROT SENSORS AND LOW RESOLUTION SPECTRUM ANALYSIS

An optical system having an optical sensor with an ultra-short FP cavity, and a low-resolution optical interrogation system coupled to the optical sensor and operational to send light signals and receive light signals to and from the optical sensor is disclosed. The optical system may operate in a wavelength range including the visible and near-infrared range. Methods of interrogating optical sensors are provided, as are numerous other aspects. 1. An optical system , comprising:an optical sensor having an ultra-short FP cavity; andan optical interrogation system coupled to the optical sensor and operational to send light signals to the optical sensor and receive light signals from the optical sensor within a wavelength range including the visible and near-infrared range.2. The optical system of claim 1 , wherein the optical interrogation system comprises a spectrally-sensitive detection system and broad-band light source.3. The optical system of claim 2 , wherein the spectrally-sensitive detection system has a spectral resolution of 0.5 nm or worse.4. The optical system of claim 2 , wherein the spectrally-sensitive detection system has a spectral resolution of between 0.5 nm and 10 nm.5. The optical system of claim 1 , wherein the wavelength range comprises at least between 400 nm and 1100 nm.6. The optical system of claim 1 , comprising:a color detector adapted to receive the light signals and simultaneously detect light-intensity at different wavelengths.7. The optical system of claim 1 , comprising:multimode lead-in fibers coupled to the optical sensor.8. The optical system of claim 1 , comprising:a Fabry-Perot optical fiber sensor having an initial cavity length shorter than 2.5 μm.9. The optical system of claim 1 , comprising:a Fabry-Perot optical fiber sensor having an initial cavity length shorter than 1.5 μm.10. The optical system of claim 1 , comprising:a Fabry-Perot optical fiber sensor having an initial cavity length shorter than 1 μm.11. The optical ...

Spectrometer Device and Method for Producing a Spectrometer Device

A spectrometer device includes an optical interference filter which is designed to filter specific wavelength ranges of an incident light beam on passage through the optical interference filter. The spectrometer device also includes a detector device which is designed to detect the filtered light beam. Further, the spectrometer device includes a focusing device with a reflective surface. The focusing device is designed to focus the filtered light beam onto the detector device by reflection on the surface.

APPARATUS AND METHODS FOR EXTRACTING TOPOGRAPHIC INFORMATION FROM INSPECTED OBJECTS

Systems and methods for extracting topographic information from inspected objects to identify defects in the inspected objects. A part to be inspected is illuminated with at least two different colors emitted from an illuminator providing a gradient of light consisting of the at least two different colors. A single color image of the illuminated part to be inspected is acquired, providing a color-coded topographic mapping of the part to be inspected due, at least in part, to the gradient of light. Topographic monochrome views of the part to be inspected may be generated from the single color image. Each view of the topographic monochrome views may enhance a different type of feature or defect present in the part to be inspected which can be analyzed and detected. 1. A system comprising:an illuminator, for illuminating a part to be inspected, configured to provide a gradient of light consisting of at least two different colors;a color camera positioned near a distal end of the illuminator, defining an optical axis through an interior portion of the illuminator, wherein the gradient of light is along the direction of the optical axis;a controller component operatively connected to the illuminator and the color camera and configured to trigger the illuminator and the color camera to acquire a single color image of the part to be inspected located near a proximal end of the illuminator; anda processing component operatively connected to the color camera and configured to receive and process the single color image to generate two or more topographic monochrome views of the part to be inspected from the single color image.2. The system of claim 1 , wherein the illuminator is configured to illuminate the part to be inspected such that the acquired single color image provides a color-coded topographic mapping of the part to be inspected.3. The system of claim 1 , wherein the two or more topographic monochrome views are inherently spatially registered with each other.4. The ...

SPECTROMETER

A spectrometer for temporally separating electromagnetic radiation () includes a cavity () having first and second reflecting mirrors (). The first mirror () has an aperture () arranged to allow electromagnetic radiation () to be input into the cavity (). The spectrometer also includes an imaging device () between the first and second mirrors () that defines an optical axis of the cavity () and performs spatial Fourier transforms of the electromagnetic radiation (). The first and/or second mirrors () has a normal that is arranged at a non-parallel angle to the optical axis, such that the position and/or angle of incidence of electromagnetic radiation () on the second mirror is shifted after each round trip. The second mirror () allows a wavelength component () of the electromagnetic radiation to be output from the cavity () when the position and/or angle of incidence of the electromagnetic radiation on the second mirror () after one or more round trips of the cavity () exceeds a threshold. 1. A spectrometer for temporally separating input electromagnetic radiation , the spectrometer comprising:a cavity comprising a first mirror and a second mirror arranged to reflect input electromagnetic radiation therebetween, wherein the first mirror comprises an aperture arranged to allow electromagnetic radiation to be input into the cavity through the aperture; andan imaging device arranged in the path taken by the electromagnetic radiation between the first and second mirrors, wherein the imaging device defines an optical axis of the cavity and the imaging device is arranged to perform a spatial Fourier transform of the input electromagnetic radiation from the aperture in the first mirror onto the second mirror and to perform a spatial Fourier transform of the reflection of the electromagnetic radiation from the second mirror back onto the first mirror;wherein at least a portion of one or both of the first and second mirrors has a normal that is arranged at a non-parallel ...

Wavelength Shift Correction System and Wavelength Shift Correction Method

A system and method include a wavelength shift correction light source emitting wavelength shift correction emission-line light and a spectrometer including: a spectroscopic unit receiving with photoelectric conversion elements rays of dispersed spectral light obtained by dispersing incident light based on wavelength, and outputs electrical signals corresponding to light intensities of the rays of dispersed spectral light; and a unit that measures temperature of the spectroscopic unit. When the wavelength shift correction emission-line light is measured as the incident light with the spectrometer, this system and method determine wavelength shift correction time emission-line wavelength corresponding to wavelength shift correction emission-line light, based on electrical signals from photoelectric conversion elements receiving wavelength shift correction emission-line light, and the measured temperature. The system and method determine wavelength variation from the difference between determined wavelength shift correction time emission-line wavelength and known emission-line wavelength of the wavelength shift correction emission-line light. 1. A wavelength shift correction system comprising:a wavelength shift correction light source that emits wavelength shift correction emission-line light;a spectrometer including: a spectroscopic part that receives, with a plurality of photoelectric conversion elements arranged in a direction of dispersion, respective rays of dispersed spectral light obtained by dispersing incident light in accordance with wavelength, and outputs respective electrical signals corresponding to respective light intensities of the respective rays of dispersed spectral light; and a temperature measurer that measures temperature of the spectroscopic part, the spectrometer being a spectrometer to be subjected to wavelength shift correction; anda hardware processor that determines a wavelength shift correction time emission-line wavelength corresponding ...

DEVICE FOR ACQUIRING OPTICAL INFORMATION OF OBJECT

An information acquiring device that acquires information on a measurement object includes: a dividing section that divides pulsed light having a center wavelength λc emitted from a light source into lights for a plurality of optical paths; waveguides provided in each of the optical paths; a multiplexing section that multiplexes lights emitted from the waveguides; and an information acquiring section that acquires information through detection of a light obtained by the multiplexing by the multiplexing section and applied to the object. In the information acquiring device, the waveguides provided in the optical paths, respectively are waveguides having different zero dispersion wavelengths, and the waveguides generate a plurality of wavelength-converted lights each having a center wavelength different from the center wavelength λc of the pulse light.

Near-infrared time-of-flight imaging using laser diodes with bragg reflectors

A remote sensing system includes an array of laser diodes configured to generate light. One or more scanners are configured to receive a portion of the light from the array of laser diodes and to direct the portion of the light from the array of laser diodes to an object. A detection system is configured to receive at least a portion of light reflected from the object and is configured to be synchronized to the at least a portion of the array of laser diodes comprising Bragg reflectors. The remote sensing system is configured to generate a two-dimensional or three-dimensional mapping using at least a portion of a time-of-flight measurement. The remote sensing system is adapted to be mounted on a vehicle and communicate with a cloud. The at least a portion of the two-dimensional or three-dimensional mapping is combined with global positioning system information.

SYSTEMS AND METHODS FOR HYPERSPECTRAL IMAGING

A method, and corresponding system, can include identifying a plurality of wavelength spectral band components in hyperspectral image data, the spectral band components corresponding to mutually distinct sources of image contrast. An intensity image corresponding to each respective spectral band component can be calculated, followed by combining the respective intensity images to form an inter-band image based on the respective, mutually distinct sources of image contrast for each spectral band component. Intensity images can be hyperspectral or hyperdiffuse images. Hyperdiffuse imaging can be performed for each spectral band component identified using hyperspectral measurements. Spectral position and spectral width images corresponding to each spectral band component can be calculated and used to determine depth of features inside a surface of the target. Diffuse width images can be calculated from hyperdiffuse image data and used to determine depth. 1. A method comprising:identifying a plurality of wavelength spectral band components in hyperspectral image data, the spectral band components corresponding to mutually distinct sources of image contrast;calculating respective intensity images corresponding to each respective spectral band component;combining the respective intensity images to form inter-band images based on the respective, mutually distinct sources of image contrast for each spectral band component; andproducing a 2D image of enhanced contrast using selection of one or more of the inter-band images that are of greater contrast than one or more others of the inter-band images.2. The method of claim 1 , wherein calculating the respective intensity images includes performing an intra-band pixel-wise analysis of one or more of the spectral band components.3. The method of claim 1 , wherein combining the respective intensity images to form an inter-band image includes performing an inter-band pixel-wise analysis by dividing individual pixel values of one ...

APPARATUS AND METHOD FOR ANALYZING COMPONENT OF OBJECT, AND IMAGE SENSOR

A method and an apparatus for analyzing a component of an object are provided. The apparatus includes an image sensor including an optical module, and the optical module includes a light source configured to emit a source light, a first detector configured to detect a first light that is scattered or reflected from the object on which the emitted source light is incident, and a second detector configured to detect a second light that is emitted by the light source but is not incident on the object. The apparatus further includes a processor configured to calculate a scattering coefficient and an absorption coefficient, based on the detected first light and the detected second light, and analyze the component of the object, based on the calculated scattering coefficient and the calculated absorption coefficient. 1. An apparatus for analyzing a component of an object , the apparatus comprising: a light source configured to emit a source light;', 'a first detector configured to detect a first light that is scattered or reflected from the object on which the emitted source light is incident; and', 'a second detector configured to detect a second light that is emitted by the light source but is not incident on the object; and, 'an image sensor comprising an optical module, wherein the optical module comprises calculate a scattering coefficient and an absorption coefficient, based on the detected first light and the detected second light; and', 'analyze the component of the object, based on the calculated scattering coefficient and the calculated absorption coefficient., 'a processor configured to2. The apparatus of claim 1 , wherein the image sensor further comprises a substrate on which the optical module is disposed at each of nodes to form a network structure.3. The apparatus of claim 2 , wherein a first portion of the emitted source light is emitted from a first surface of the light source claim 2 , is incident on the object claim 2 , is scattered or reflected from ...

SPECTROSCOPIC MEASUREMENT APPARATUS, ELECTRONIC APPARATUS, AND SPECTROSCOPIC MEASUREMENT METHOD

A spectroscopic measurement apparatus includes a light emitter simultaneously emitting light including light having all wavelengths in a wavelength range from 400 nm to 700 nm to a measurement target, a light disperser dispersing a reflected light reflected by the measurement target to a predetermined wavelength, a light receiver that receives the light dispersed by the light disperser and outputs a second light reception amount indicating a light intensity of the received light, and a calculator that receives the second light reception amount of each wavelength and calculates a reflection spectrum when the measurement target is irradiated with light, in which the calculator calculates reflectance of a predetermined wavelength using the second light reception amounts of a plurality of wavelengths. 1. A spectroscopic measurement apparatus comprising:a light emitter simultaneously emitting light including light having all wavelengths in a wavelength range from 400 nm to 700 nm to a measurement target;a light disperser dispersing a reflected light reflected by the measurement target to a predetermined wavelength;a light receiver that receives the light dispersed by the light disperser and outputs a second light reception amount indicating a light intensity of the received light; anda calculator that receives the second light reception amount of each wavelength and calculates a reflection spectrum when the measurement target is irradiated with light, whereinthe calculator calculates reflectance of a predetermined wavelength using the second light reception amounts of a plurality of wavelengths.2. The spectroscopic measurement apparatus according to claim 1 , wherein claim 1 ,when an intensity of the light which is dispersed from the reflected light emitted from the light emitter to a standard substrate and reflected by the light disperser and is received by the light receiver is a first light reception amount, anda matrix for estimating, from the measurement reflectance ...

Spectroscopic apparatus and spectroscopic light source

A spectroscopic apparatus includes an optical system configured to transmit output light from a sample irradiated with irradiation light from a light source, a two-dimensional array light detector configured to photograph light transmitted through the optical system, and a control unit. The optical system includes a first optical device disposed between the sample and the two-dimensional array light detector, a second optical device disposed between the two-dimensional array light detector and the first optical device, and a variable band-pass filter disposed in at least one of spaces between the first optical device and the sample and between the second optical device and the two-dimensional array light detector. The control unit changes a light transmission wavelength band of the variable band-pass filter in accordance with a photographing timing of the two-dimensional array light detector.

Detection, characterization and presentation of adverse airborne phenomena

Aircraft system and method detecting and present information relating to adverse airborne phenomena along an aircraft flight route. An imaging unit that includes an IR detector and a tunable spectral filter acquires IR images of the external environment, by acquiring wideband IR images when operating in a first mode and narrowband IR images respective of difference IR spectral bands when operating in a second mode. A data analysis unit detects and determines characteristics of adverse airborne phenomena in the environment based on at least the spectral signatures of environmental features in the acquired narrowband IR images. A display unit dynamically displays a visual representation of the detected adverse airborne phenomenon and its determined characteristics, overlaid onto a view of the external environment displayed to an operator of the aircraft. The visual representation may include variable visual attributes representing respective categories of characteristics of the detected adverse airborne phenomenon.

Measuring Apparatus for Measuring Optical Properties of a Medium

A measuring apparatus, comprising at least a first light source and a second light source for transmitting light; at least one light receiver for receiving light at least of a first received wavelength and a second received wavelength; at least one dispersing element for bending and/or refracting light; wherein the light transmitted by the light sources strikes the dispersing element and is so turned by the dispersing element that it strikes the light receiver. The first light source is arranged at a first angle relative to the dispersing element and the second light source at a second angle relative to the dispersing element, wherein the second angle differs from the first angle. The first angle is so embodied that the wavelength of the light turned by the dispersing element corresponds to the first received wavelength, and wherein the second angle is so embodied that the wavelength of the light turned by the dispersing element corresponds to the second received wavelength. 110-. (canceled)11. A measuring apparatus for measuring optical properties of a medium , comprising:at least a first light source and a second light source for transmitting light;at least one light receiver for receiving light at least of a first received wavelength and a second received wavelength; andat least one dispersing element for bending and/or refracting light, wherein:the light transmitted by the light sources strikes said dispersing element and is so turned by said dispersing element that it strikes said light receiver;said first light source is arranged at a first angle relative to said dispersing element and said second light source at a second angle relative to said dispersing element;said second angle differs from said first angle;said first angle is so embodied that the wavelength of the light turned by said dispersing element corresponds to the first received wavelength; andsaid second angle is so embodied that the wavelength of the light turned by said dispersing element ...

FIXTURE THAT PROVIDES LIGHT INCORPORATING A RECONFIGURABLE SPECTROMETER

Disclosed are examples of spectrometer-equipped devices that provide general illumination supplied by artificial or natural light, and that also detect substances in the environment around the device. In some examples, light may be emitted by a spectrometer light source. The spectrometer detects the light from any of a natural light source, artificial general illumination light or light from the spectrometer light source passed, reflected or shifted and regenerated by substances in the air or on a surface in the vicinity of the device. In response, the spectrometer generates signals representative of the spectral power distribution (e.g. intensities of given wavelengths in the optical spectrum) of the detected light. A controller analyzes the spectrometer generated signals and initiates action based on or outputs a report indicating the environmental condition detected by the spectrometer-equipped device. 1. A lighting device , comprising:a housing;a light source within the housing configured to output artificial light for general illumination;a spectrometer, within the housing, configured to detect light and generate signals corresponding to intensities of different wavelengths of the detected light;a communication interface coupled to a data communication network;a memory storing spectral reference data and program instructions for analyzing the spectrometer generated signals; and control operation of the light source;', 'analyze the signals generated by the spectrometer in response to detecting light in relation to the reference data to detect an environmental condition in an environment in which the lighting device is located; and', 'output, via the communication interface, a report of the detected environmental condition., 'a processor coupled to the memory, the communication interface, the light source and the spectrometer, wherein the processor, when executing the stored program instructions is configured to perform functions, including functions to2. The ...

SPECTROMETRIC DEVICE AND SPECTROMETRIC METHOD

A spectroscopic measurement apparatus includes an optical system, a photodetector, and an analysis unit. The optical system guides measurement target light from an object to a light receiving surface of the photodetector, and forms a spectral image of the measurement target light on the light receiving. The photodetector includes the light receiving surface on which a plurality of pixels are arranged respectively on a plurality of rows. The photodetector receives the spectral image for a first exposure time by a plurality of pixels in a first region on the light receiving surface, and outputs first spectrum data. The photodetector receives the spectral image for a second exposure time by a plurality of pixels in a second region on the light receiving surface, and outputs second spectrum data. The second exposure time is longer than the first exposure time. 1: A spectroscopic measurement apparatus comprising:an optical system configured to disperse measurement target light to form a spectral image;a photodetector including a light receiving surface on which a plurality of pixels are arranged respectively on a plurality of rows with the spectral image having a wavelength axis in a pixel arrangement direction of each of the plurality of rows being formed on the light receiving surface, and configured to receive the spectral image for a first exposure time by a plurality of pixels arranged on one or a plurality of rows in a first region on the light receiving surface to output first spectrum data of the measurement target light, and receive the spectral image for a second exposure time by a plurality of pixels arranged on one or a plurality of rows in a second region on the light receiving surface to output second spectrum data of the measurement target light; andan analysis unit for configured to obtain a spectrum of the measurement target light based on the first spectrum data and the second spectrum data, whereinthe second exposure time is longer than the first ...

COMPUTER STORAGE MEDIUM, NETWORK SYSTEM FOR DISTRIBUTING SPECTRAL CAMERA CONTROL PROGRAM AND SPECTRAL IMAGE CAPTURING METHOD USING SPECTRAL CAMERA CONTROL DEVICE

A spectral image capturing method using a spectral camera control device installed in aircraft, the method comprising: 113-. (canceled)14. A computer storage medium for storing a spectral camera control program , being installed , along with a spectral camera provided with a liquid crystal tunable filter , in an aircraft capable of stationary flight , the control program comprising:step of causing a computer, which is installed in the aircraft, to function as a spectral camera control device which causes the spectral camera to capture a spectral image in a snapshot mode each time a transmission wavelength of the liquid crystal tunable filter is switched while the aircraft is in stationary flight,step of causing the computer to set an exposure time of the spectral camera to a shorter time than a current exposure time when either one of an amount of attitude change and an amount of position change of the spectral camera per exposure time in the spectral camera exceeds a predetermined threshold based on a spatial resolution of the spectral camera, and {'br': None, 'i': T Подробнее

DEVICE AND METHOD FOR INSPECTING A HAIR SAMPLE

The present application is directed to a device for inspecting a keratinous surface of a user, preferably a hair sample, comprising a housing in which an image sensor is arranged to receive measurement light emitted from a measuring area configured to accommodate the keratinous surface, through a measurement window in a front wall of the housing, over a corresponding imaging light path, the device being further equipped with an illumination ring arranged in the housing rear of the measurement window around the imaging light path, said illumination ring having two opposed partially peripheral illumination portions separated by two opposed complementary partially peripheral non-illuminating portions, the illuminating portions being further configured to illuminate the measuring area through the measurement window over a illumination light path, said illumination light path having an angle of incidence comprised between 30 to 60°, preferably about 45°. 1. A device for inspecting a scalp surface of a user or a hair sample , comprising a housing in which an image sensor is arranged to receive measurement light emitted from a measuring area configured to accommodate the keratinous surface , through a measurement window in a front wall of the housing , over a corresponding imaging light path ,the device being further equipped with an illumination ring arranged in the housing rear of the measurement window around the imaging light path, said illumination ring having two opposed partially peripheral illumination portions extending over a sector of 30 to 60° and separated by two opposed complementary partially peripheral non-illuminating portions, the illuminating portions being further configured to illuminate the measuring area through the measurement window over a illumination light path, said illumination light path having an angle of incidence comprised between 30 to 60° , preferably about of 45° so as to form a 45:0 measurement configuration, wherein the device is ...

Systems for Detecting Vascular and Arterial Disease in Asymptomatic Patients and Related Methods

Multispectral imaging systems are provided including an illumination control module configured to image a sample and provide an imaging output sequence including images and data; a multi-spectral physiologic visualization (MSPV) module, a peripheral oxygen saturation (SpO) module and a physiologic status parameters (PSP) module configured to receive the imaging output sequence of the illumination control module simultaneously. The MSPV module is configured to provide real-time blood flow distribution visualization of a field of view (FOV) responsive to the received imaging output sequence. The SpOmodule is configured to provide real-time SpOinformation at a tissue surface level for the FOV responsive to the received imaging and output sequence. The PSP module is configured to derive status parameters in real-time from metadata associated with the received imaging and output sequence of the FOV. The system further includes a processing engine configured to integrate and analyze the real-time blood flow distribution visualization, SpOinformation and derived status parameters. 1. A multispectral imaging system comprising:an illumination control module configured to image a sample and provide an imaging output sequence including images and data;{'sub': '2', 'a multi-spectral physiologic visualization (MSPV) module, a peripheral oxygen saturation (SpO) module and a physiologic status parameters (PSP) module configured to receive the imaging output sequence of the illumination control module simultaneously,'}wherein the MSPV module is configured to provide real-time blood flow distribution visualization of a field of view (FOV) responsive to the received imaging output sequence;{'sub': 2', '2, 'wherein the SpOmodule is configured to provide real-time SpOinformation at a tissue surface level for the FOV responsive to the received imaging and output sequence; and'}wherein the PSP module is configured to derive status parameters in real-time from metadata associated with the ...

ULTRA LOW POWER SOLID STATE SPECTRAL RADIOMETER

A spectral radiometer system, measures incoming light intensity and spectral distribution in different wavelength-bands. An additional data storage device allows recording of the measured data. The inclusive sensor system yields very high sensitivity to incoming light. Furthermore, outstanding linearity of the detector response over several orders of magnitude of incoming light is achieved. Additional benefits are ultra low power consumption and minimum size. The sensor system can be used in remote solar radiation monitoring applications like mobile solar power units as well as in long-term environmental monitoring systems where high precision and low power consumption is a necessity. 1. A spectral radiometer apparatus measuring light intensity , detecting spectral distribution in different wavelength-bands , storing and transferring related data , the apparatus comprising:a spectrally sensitive circuit element section, including one or more elements selected from a group of elements consisting of photon-dependent charge generation elements and recombination elements and additional charge characteristic components, selected from a group of additional charge characteristic components consisting of diode components and resistance capacitance components;a central processing unit (CPU), including a computer processor and a plurality of input output ports, communicatively coupled to the spectrally sensitive circuit element section and a timing apparatus and a data storage device, where the computer processor contains program code in memory, which when executed by the computer processor causes the computer processor to measure incoming light intensity detected by the spectrally sensitive circuit element section, and additionally causes the CPU to calculate, record and further process light intensity data; anda case having a lid cover assembly removably fastened on top of the case, wherein the spectrally sensitive circuit element section and the central processing unit ...

Integrated spectrometers with single pixel detector

An integrated waveguide based spectrometer is described. The spectrometer comprises a sensing region for receiving multi-wavelength radiation for irradiating a sample in the sensing region, a wavelength demultiplexing element arranged for capturing said multi-wavelength radiation after interaction with the sample and for providing a number of wavelength demultiplexed radiation outputs or a number of different groups of wavelength demultiplexed radiation outputs, an integrated modulator for differently modulating the different demultiplexed radiation outputs or different groups of demultiplexed radiation outputs, and a multiplexer element for multiplexing the differently modulated demultiplexed radiation outputs or the differently grouped demultiplexed radiation outputs.

SYSTEM FOR EARLY DETECTION OF PLANT DISEASE

An apparatus for detecting a plant health status is described. The apparatus includes a light source positioned relative to the plant and a detector positioned relative to the plant. The light source is configured to emit a white light or an ultraviolet light. The ultraviolet (UV) light corresponds to UV-A and has a wavelength in the range of 340 nanometers (run) to 400 nm. The detector is configured to receive evaluation light. The evaluation light is related to the emitted light and corresponds to a health status of the plant. 1. An apparatus for detecting a plant health status , the apparatus comprising:a light source positioned relative to the plant, the light source configured to emit a white light or an ultraviolet light, the ultraviolet (UV) light corresponding to UV-A and having a wavelength in the range of 340 nanometers (nm) to 400 nm; anda detector positioned relative to the plant, the detector configured to receive evaluation light, the evaluation light related to the emitted light and corresponding to a health status of the plant.2. The apparatus of claim 1 , further comprising a light source polarizer positioned between the light source and the plant claim 1 , wherein the light source is configured to emit the white light and the light source polarizer is configured to filter the emitted white light.3. The apparatus of claim 1 , further comprising a detector polarizer positioned between the detector and the plant claim 1 , wherein the light source is configured to emit the white light claim 1 , the detector polarizer is configured to filter an intermediate light and the evaluation light corresponds to the filtered intermediate light.4. The apparatus according to claim 1 , further comprising a location sensor configured to sense a location of the plant claim 1 , the location sensor coupled to at least one of the light source or the detector.5. The apparatus according to claim 1 , wherein the light source is selected from the group comprising a ...

SPECTROMETER

A spectrometer includes: a tungsten lamp which emits light with no peak wavelength within a wavelength range of visible light and having a light amount increasing as the wavelength becomes longer; a violet LED which emits light having a peak wavelength within the wavelength range of visible light; a light mixer which mixes light emitted from the tungsten lamp and the violet LED; an etalon which receives light mixed by the light mixer and transmits light contained in the received mixed light and having a particular wavelength; a light receiving unit which receives light transmitted by the etalon; and a measurement control unit which changes the wavelength of light that can pass through the etalon and measures spectral characteristics of the light having passed through the etalon based on the light received by the light receiving unit. 1. A spectrometer comprising:a first light source which emits first light with no peak wavelength and having a light amount increasing as a wavelength of the first light becomes longer within a predetermined wavelength range;a second light source which emits second light having a peak wavelength within the predetermined wavelength range;a wavelength variable interference filter which transmits light having a wavelength varied by a driving voltage;a light receiving unit which receives the light transmitted by the wavelength variable interference filter; anda correction unit which corrects the driving voltage based on a relationship between the peak wavelength of the second light and the driving voltage when the wavelength variable interference filter transmits the light having the peak wavelength of the second light.2. The spectrometer according to claim 1 , wherein the peak wavelength of the second light is within a range of 385 nm to 450 nm.3. The spectrometer according to claim 1 , further comprising:a light mixer which mixes the first light and the second light into mixed light.4. The spectrometer according to claim 1 , wherein the ...

AUTO-FOCUS RAMAN SPECTROMETER SYSTEM

An autofocus Raman spectrometer system includes a laser probe assembly, a microprocessor, adjustable stages and a driving means. The laser probe assembly includes an excitation means, a focusing optics provided to focus an excitation beam from the excitation means onto a sample and generate Raman scattering spectrum, a collection optics for collecting the Raman scattering spectrum, and a spectrographic detector for generating a Raman spectrum based on the Raman scattering intensity received from the collection optics. The microprocessor receives the Raman spectra signal therefrom. The laser probe assembly is situated on the adjustable stage. The driving means is coupled to the microprocessor and configured to drive the stage to move with respect to the sample. The microprocessor generates a command to the driving means for moving a position of the adjustable stage to achieve an optimal optical focus based on signal intensity of the spectra peaks measured by the spectrographic detector. 1. An autofocus Raman spectrometer system , comprising:a laser probe assembly including an excitation means, a focusing optics provided to focus an excitation beam from the excitation means onto a sample and generate Raman scatter, a collection optics for collecting the Raman scatter, and a spectrographic detector for generating a Raman spectrum signal based on an intensity of the Raman scatter received from the collection optics;a microprocessor coupled to the spectrographic detector to receive the Raman spectrum signal therefrom;an adjustable stage whereupon either one of the sample or the laser probe assembly is situated; anda driving means coupled to the microprocessor and configured to drive the adjustable stage to move, thereby allowing adjustment of a separation between the sample and the focusing lens of the laser probe assembly;wherein the microprocessor generates a command to the driving means for moving a position of the adjustable stage to achieve an optimal optical focus ...

OPTICAL MODULE, ELECTRONIC DEVICE, AND DRIVING METHOD

An optical module includes a wavelength variable interference filter having a fixed reflective film, a movable reflective film which faces the fixed reflective film with a gap between reflective films interposed therebetween, and an electrostatic actuator that changes the gap between reflective films, and a gap control unit that controls the electrostatic actuator. The gap control unit controls the electrostatic actuator on the basis of an order which is set in accordance with a wavelength to be measured, and changes the gap between the reflective films. 1. A driving method of wavelength variable interference filter , the wavelength variable interference filter including an actuator that controls wavelength of measurement light and a voltage controller that applies a plurality of voltages to the actuator , the method comprising:applying a first voltage among the plurality of voltages to the actuator, the first voltage corresponding to a first wavelength of m+1-th light in a first wavelength range;acquiring a first detection signal that corresponds to a first light amount of a first measurement light;after the acquiring the first detection signal, applying a second voltage among the plurality of voltages to the actuator, the second voltage corresponding to a second wavelength of m-th light in a second wavelength range; andacquiring a second detection signal that corresponds to a second light amount of a second measurement light,the first voltage being smaller than the second voltage.2. The driving method of wavelength variable interference filter according to claim 1 ,the voltage controller applies the plurality of voltages including the first voltage and the second voltage in ascending order.3. The driving method of wavelength variable interference filter according to claim 1 , the wavelength variable interference filter including a first mirror and a second mirror claim 1 , a gap between the first mirror and the second mirror corresponding to the wavelength of ...

OXYVU-1 HYPERSPECTRAL TISSUE OXYGENATION (HTO) MEASUREMENT SYSTEM

The invention is directed to a hyperspectral/multispectral system referred to as the OxyVu-1 system. The hyperspectral imaging technology performs spectral analysis at each point in a two-dimensional scanned area producing an image displaying information derived from the analysis. For the OxyVu-1 system, the spectral analytical methods determined in superficial tissues approximate values of oxygen saturation (HT-Sat), oxyhemoglobin levels (HT-Oxy), and deoxyhemoglobin levels (HT-Deoxy). The OxyVu-1 system displays the tissue oxygenation in a two-dimensional, color-coded image. 140-. (canceled)41. A non-transitory computer readable storage medium storing one or more programs , the one or more programs comprising instructions which , when executed by an imaging system configured to acquire a plurality of images of a tissue of a subject , cause the imaging system to:resolve a plurality of absorption signals from the plurality of images,account for a contribution provided by melanin and losses caused by diffuse scattering in each respective absorption signal in the plurality of absorption signals, wherein the respective contribution provided by melanin and the respective losses provided by diffuse scattering to each respective absorption signal in the plurality of absorption signals are collectively modeled, thereby forming a plurality of corrected absorption signals,determine a plurality of tissue oxygenation measurements for the tissue based on the plurality of corrected absorption signals, andform a two-dimensional image of tissue oxygenation of the tissue from the plurality of tissue oxygenation measurements.42. The non-transitory computer readable storage medium of claim 41 , wherein the plurality of tissue oxygenation measurements comprise: a value for oxyhemoglobin and a value for deoxyhemoglobin.43. The non-transitory computer readable storage medium of claim 41 , wherein the two-dimensional image of tissue oxygenation comprises a plurality of pixels and for ...

Far-Infrared Spectroscopy Device

This far-infrared spectroscopy device is provided with: a variable wavelength far-infrared light source that generates first far-infrared light; an illuminating optical system that irradiates a sample with the first far-infrared light; a detecting nonlinear optical crystal that converts second far-infrared light into near-infrared light using pump light, said second far-infrared light having been transmitted from the sample; and a far-infrared image-forming optical system that forms an image of the sample in the detecting nonlinear optical crystal. The irradiation position of the first far-infrared light on the sample does not depend on the wavelength of the first far-infrared light.

Hybrid spectral imager

The invention discloses a hybrid and scanning/snapshot spectral imager operating in both staring-spectral scanning and video snapshot spectral imaging modes. Snapshot spectral imaging operation at a set of selectable critical spectral bands comprise the basis for a machine learning-based estimation and video-rate display of a full hyperspectral cube, without compromising spatial resolution. Operating in the staring-type scanning mode, the disclosed hybrid spectral imager acquires sets of narrow band images at a given tuning step and for a plurality of tuning steps until completing a hyperspectral cube sampling. Scanning operation may be used for optimally configuring snapshot operation, such that redundant information present in the collected spectra is discarded. The disclosed hybrid spectral imager includes embodiments susceptible for miniaturization and low power operation, allowing for their integration into mobile phone and computer platforms. The invention is intended to address applications comprising, at least in part, nondestructive testing, real-time spectral and chemical mapping, noninvasive diagnosis and spectral photography.

HYPERSPECTRAL THERMOREFLECTANCE IMAGING

A method for providing a high spatial resolution thermal imaging of an active electronic device. The method includes placing an electronic device on a testing stage of an imaging system. The method, calibrating the imaging system by determining thermoreflectance coefficient for a plurality of pixels forming thermal images, each pixel having a coordinate (x,y) captured from the electronic device at each of a plurality of wavelengths of illumination (C(x,y,λ), activating the electronic device, and determining changes in reflection for each of the plurality of pixels at each of the plurality of wavelengths (ΔR/R), determining ΔR/R vs. C(x,y,λ) for each of the plurality of pixels for each of the plurality of wavelengths, fitting ΔR/R vs. C(x,y,λ) to a predetermined mathematical function and use the parameters to calculate the temperature at each pixel. 1. A method for providing a high spatial resolution thermal imaging of an active electronic device , comprising:placing an electronic device on a testing stage of an imaging system, wherein the testing stage is configured to align the electronic device according to a set of coordinates and change the temperature of the electronic device;{'sub': TRi', 'i, 'calibrating the imaging system by determining thermoreflectance coefficient for a plurality of pixels forming thermal images, each pixel having a coordinate (x,y) captured from the electronic device at each of a plurality of wavelengths of illumination (C(x,y,λ);'}activating the electronic device;determining changes in reflection for each of the plurality of pixels at each of the plurality of wavelengths (ΔR/R);{'sub': TRi', 'i, 'determining ΔR/R vs. C(x,y,λ) for each of the plurality of pixels for each of the plurality of wavelengths;'}{'sub': TRi', 'i, 'fitting ΔR/R vs. C(x,y,λ) to a predetermined mathematical function;'}determining parameters of the predetermined mathematical function; and{'sub': i', 'i, 'calculating ΔT(x,y,λ) based on the parameters for each pixel at ...

Optical spectroscopy device including a plurality of emission sources

A wavelength spectroscopy device includes, on a substrate, a filter cell CF constituted by two mirrors separated by a spacer membrane, the filter cell being made up of a plurality of interference filters. Furthermore, the device also includes an emission cell CE having a plurality of emission sources, each of the sources being associated with one of the interference filters.

METHODS AND SYSTEM FOR THERMO-OPTIC POWER MONITORING

A radiation monitor for a lighting device, and operating methods and systems therefor are provided. In one example, a radiation monitor may include a first sensor receiving radiation output directly from a light-emitting element of the lighting device and radiation output from external sources; and a second sensor receiving the radiation output from the external sources without receiving the radiation output directly from the light-emitting element of the lighting device. The radiation monitor may determine an intensity of the radiation output directly from the light-emitting element based on a difference in the output signals from the first sensor and the second sensor. 1. A radiation monitor for a lighting device , comprising:a first sensor receiving radiation output directly from a light-emitting element of the lighting device and radiation output from external sources;a second sensor receiving the radiation output from the external sources without receiving the radiation output directly from the light-emitting element of the lighting device; andelectronic circuitry receiving output signals from the first sensor and the second sensor and determining an intensity of the radiation output directly from the light-emitting element based on a difference in the output signals from the first sensor and the second sensor.2. The radiation monitor of claim 1 , further comprising a radiation filter shielding the second sensor from the radiation output directly from the light-emitting element claim 1 , while allowing the radiation from the external sources to reach the second sensor.3. The radiation monitor of claim 2 , wherein the first sensor and the second sensor comprise thermocouples.4. The radiation monitor of claim 3 , wherein the second sensor is positioned at a non-light-emitting side of a light-emitting plane of the light-emitting element.5. The radiation monitor of claim 4 , wherein the radiation filter comprises the light-emitting element emitting radiation at a ...

Light source apparatus for light measurement

To provide a light source apparatus for light measurement in which time wavelength uniqueness is not lost even in a case of high output, and to enable spectroscopic measurement with high accuracy and at high speed. Broadband pulsed light having a continuous spectrum over a wavelength width of at least 50 nm in a range of 900 to 1300 nm is emitted from a pulsed light source, and divided for each wavelength by a divider, and light having each wavelength is transmitted by each of stretch fibers and emitted from a coupler. The stretch fibers have different lengths such that an elapsed time and the wavelength in one pulse correspond to each other on a one-to-one basis at an emission end.

SPECTROSCOPIC MEASUREMENT DEVICE AND SPECTROSCOPIC MEASUREMENT METHOD

A spectroscopic measurement device includes a variable wavelength interference filter capable of selectively emitting light with a predetermined wavelength out of incident light, and changing the wavelength of the light to be emitted, a light receiving element adapted to output a detection signal corresponding to a light exposure in response to an exposure to the light emitted from the variable wavelength interference filter, a detection signal acquisition section adapted to obtain a plurality of detection signals different in the light exposure from each other with respect to each of the wavelengths, and a selection section adapted to select the detection signal having a highest signal level out of signal levels of the detection signals obtained, which are lower than a maximum signal level corresponding to a saturated light exposure of the light receiving element. 1. A spectroscopic measurement device comprising:a spectroscopic element capable of selectively emitting light with a predetermined wavelength out of incident light, and changing the wavelength of the light to be emitted;a light receiving element adapted to output a detection signal corresponding to a light exposure in response to an exposure to the light emitted from the spectroscopic element;a detection signal acquisition section adapted to obtain a plurality of detection signals different in the light exposure from each other with respect to each of the wavelengths; anda selection section adapted to select the detection signal having a highest signal level out of signal levels of the detection signals obtained, which are lower than a maximum signal level corresponding to a saturated light exposure of the light receiving element.2. The spectroscopic measurement device according to claim 1 , whereinthe detection signal corresponding to a minimum light exposure out of the plurality of detection signals is obtained in an exposure condition in which when making the light reflected by a high-reflectance ...

AUTHENTICATING DEVICE

An authenticating device is used for optically authenticating a testing area of a first surface of a valuable document. The valuable document defines a normal perpendicular to the first surface and a datum penetrating the normal and two sides of the valuable document. The datum and the first surface collectively define a first area and a second area adjacent to the first area. The authenticating device includes a first light emitting unit, a second light emitting unit, and a light receiving component. The first light emitting unit is arranged within the first area. The second light emitting unit is arranged within the first area. The light receiving component is arranged within the second area. The first light emitting unit and the second light emitting unit emit light to the testing area in sequence for authenticating the variable document. 1. An authenticating device used for optically authenticating a testing area of a valuable document , the testing area located on a first surface of the valuable document , the valuable document defining a normal perpendicular to the first surface and a datum penetrating the normal and two sides of the valuable document , the datum and the first surface collectively defining a first area and a second area adjacent to the first area , the authenticating device comprising:a first light emitting unit arranged within the first area, a first angle spanning between an optical axis of the first light emitting unit and the normal;a second light emitting unit arranged within the first area, a second angle spanning between an optical axis of the second light emitting unit and the normal, the second angle being larger than the first angle;a light receiving component arranged within the second area, a third angle spanning between an optical axis of the light receiving component and the normal; anda controller electrically connected to the first light emitting unit and the second light emitting unit, the controller configured to control the ...

FAST COMPUTATIONAL PHASE AND TIMING CORRECTION FOR MULTIHETERODYNE SPECTROSCOPY

Disclosed herein is an all-digital phase and timing correction procedure for coherent averaging in dual-comb and multiheterodyne spectroscopy—applicable to any dual-comb spectroscopy setup. It can account for large frequency/phase instabilities of the used sources, yielding a significant reduction of the noise pedestal and an increase in signal-to-noise ratio (SNR) of the radio frequency (RF) beat notes. This technique is computationally efficient and can be conveniently implemented either as a post-processing algorithm or in a real-time data acquisition and processing platform without the necessity of adding any additional optical elements to the dual-comb spectroscopy system. By implementing this technique, the performance of any comb- or comb-like-source-based DCS system with a sufficient degree of mutual coherence between the optical modes can be improved in terms of SNR and number of spectroscopically-usable RF beat notes. The described technique is compatible with a DC-centered RF spectrum, where the negative frequencies are folded to the positive domain to double the number of beat notes within the detector bandwidth. The technique enables coherent averaging over extended time-scales even for free-running combs, thus increasing the sensitivity of absorption and dispersion DCS measurements. 1. A multiheterodyne spectroscopy (MHS) or dual-comb spectroscopy (DCS) system including a sample being a liquid , gaseous , or solid form substance , the system comprising:a first laser light source and a second laser light source;the first laser light source generating a first light beam having a first optical path and being directed toward a first beam splitter/combiner that creates two light beams, one directed toward the sample and the other directed toward a second beam splitter/combiner, resulting in a pre-sample first laser light beam and a post-sample first laser light beam, respectively;the second laser light source generating a second light beam having a second ...

SPECTRAL OBJECT DETECTION

A multispectral material detection system captures spectral data and compares select spectral bands to reflectance spectra of a plurality of materials. The system identifies distinguishing features in reflectance spectra of a plurality of materials and in a plurality of spectral channels identifying distinguishing structural aspects of each material with respect to the background environments. Upon an observed spectral reflectance being proximate to one or more known spectra characteristics, the object is associated with a material of interest. 1. A spectral detection system , comprising:a multispectral collection system;a reflectance spectra datafile including a plurality of reflectance spectra characteristics of a plurality of materials of interest, each in a plurality of background environments;a capture system configured to capture spectral data of an object in a background environment in two or more selectable spectral bands, wherein each selectable band is of a selectable bandwidth;a machine capable of executing instructions embodied as software; anda plurality of software portions resident on a non-transitory storage media, wherein one of said software portions is configured to compare spectral data of the object with reflectance spectra characteristics of the plurality of material of interests from a reflectance spectra datafile.2. The spectral detection system of claim 1 , wherein responsive to spectral data of the object being proximate to one or more of the reflectance spectra characteristics claim 1 , associating the object with a material of interest.3. The spectral detection system of claim 2 , wherein reflectance spectra of the material of interest selectable from the reflectance spectra datafile is associated with a specific background environment.4. The spectral detection system of claim 1 , wherein location of the two or more selectable spectral bands are predetermined.5. The spectral detection system of claim 4 , wherein each selectable bandwidth ...

STANDARD LIGHT SOURCE COLOR MATCHING OBSERVATION BOX

A standard light source color matching observation box comprises a box body, the interior space of which forms an observation chamber. The top of the observation chamber is provided with a standard light source comprising a halogen tungsten lamp under which a light filter is provided. The top of the observation chamber is further provided with an LED light. The halogen tungsten lamp emits a light ray through the light filter to be mixed with the light ray of the LED light. The illumination energy provided by a narrow-wave LED light source occupies 20% or less of the total radiation energy. The quality of the compensated light source of the invention is lower than <0.2 A level according to the metamerism index specified by D illuminant of the CIE standard. An object to be measured undergoes a color measurement by the compensated light ray to ensure accuracy of long-time color measurement. 1. A standard light source color matching observation box , comprising a box body , wherein the box body has an opening at one side and forms an observation chamber in the interior space , the top of the observation chamber is provided with a standard light source , wherein the standard light source comprises a halogen tungsten lamp , a light filter is provided in the lower part of the halogen tungsten lamp , the top of the observation chamber is further provided with a narrow-wave LED light source , the halogen tungsten lamp emits a light ray through the light filter to be mixed with the light ray of the LED light , and the illumination energy provided by the narrow-wave LED light source occupies 20% or less of the total radiation energy.2. The standard light source color matching observation box according to claim 1 , wherein the narrow-wave LED light source is provided in a group claim 1 , the group has a plurality of narrow-wave LED light sources of different wavelengths claim 1 , and when the brightness of the plurality of narrow-wave LED light sources of different wavelengths ...

Spectral camera control device, spectral camera control program, spectral camera control system, aircraft equipped with said system, and spectral image capturing method

This spectral camera control device is installed together with a spectral camera 3 provided with a liquid crystal tunable filter 33 in an aircraft 1 capable of stationary flight, and causes the spectral camera 3 to capture an image in a snapshot mode each time the transmission wavelength of the liquid crystal tunable filter 33 is switched while the aircraft 1 is in stationary flight.

SPECTROSCOPIC DETECTOR

A spectroscopic detector includes a lamp house, a sample cell, an optical sensor, a heater, a cooling fan, a temperature sensor, and a control device. The heater heats the lamp house while being directly or indirectly in contact with the lamp house containing a light source. The cooling fan is for cooling the lamp house. The temperature sensor is for detecting a temperature of the lamp house. The control device is configured to control operations of the light source, the heater, and the cooling fan. The control device includes a temperature control part configured to maintain a temperature of the lamp house while the light source is lit at a set temperature by controlling at least output of the heater based on a detection signal of the temperature sensor. 1. A spectroscopic detector comprising:a light source,a lamp house accommodating the light source therein;a sample cell, through which a sample flows therein, disposed on an optical path of light radiated by the light source and emitted from the lamp house;an optical sensor for detecting light from the sample cell;a heater for heating the lamp house while being in direct or indirect contact with the lamp house;a cooling fan for cooling the lamp house;a temperature sensor that is attached on the lamp house and detects a temperature of the lamp house; anda control device configured to control operations of the light source, the heater, and the cooling fan, the control device includes a temperature control part configured to maintain a temperature of the lamp house while the light source is lit at a preset temperature by controlling at least output of the heater based on a detection signal of the temperature sensor.2. The spectroscopic detector according to claim 1 , whereinthe temperature control part is configured to control output of the heater based on output of the temperature sensor while maintaining rotational speed of the cooling fan constant.3. The spectroscopic detector according to claim 1 , whereinthe ...

Detecting an impurity and/or a property of at least one part of a textile

In particular, a method performed by one or more devices is disclosed, the method comprising: obtaining an intensity information item representative of a spectral image resulting from a soiling of a textile and/or from at least one part of a textile; determining at least one output variable dependent on the soiling of the textile and/or at least one property of the textile from the intensity information item, wherein the output variable is determined by employing an adaptive evaluation algorithm, in particular an artificial neural network, wherein parameters of the adaptive evaluation algorithm are calibrated based on a plurality of training cases; outputting or triggering outputting of the at least one output variable. Furthermore, a device and a system for performing the subject method is disclosed.

Smoke detector for aspiration smoke detector system

A smoke detector (100) for use with an aspiration smoke detector (ASD) is described. The smoke detector includes a light source (104) configured to emit a beam of light (108); a reflector (102) including an aperture (110), the aperture aligned with a direction of propagation of the beam of light when no scattering occurs; and a photodetector (106); the reflector configured to reflect light scattered from the beam of light received at the reflector to a single focal point; and the photodetector located at the single focal point. An aspiration smoke detector (ASD) system (2) includes the smoke detector and a method of detecting smoke using the smoke detector.

SYSTEMS, DEVICES, AND METHODS FOR TIME-RESOLVED FLUORESCENT SPECTROSCOPY

Provided herein are devices, systems, and methods for characterizing a biological sample in vivo or ex vivo in real-time using time-resolved spectroscopy. A light source generates a light pulse or continuous light wave and excites the biological sample, inducing a responsive fluorescent signal. A demultiplexer splits the signal into spectral bands and a time delay is applied to the spectral bands so as to capture data with a detector from multiple spectral bands from a single excitation pulse. The biological sample is characterized by analyzing the fluorescence intensity magnitude and/or decay of the spectral bands. The sample may comprise one or more exogenous or endogenous fluorophore. The device may be a two-piece probe with a detachable, disposable distal end. The systems may combine fluorescence spectroscopy with other optical spectroscopy or imaging modalities. The light pulse may be focused at a single focal point or scanned or patterned across an area. 113.-. (canceled)14. A system for classifying or characterizing a biological sample , the system comprising:(a) a first transmission element configured to convey optical excitation signals;(b) a second transmission element configured to receive the optical excitation signals from the first transmission element and convey the optical excitation signals to the biological sample, wherein the biological sample generates responsive optical signals in response to the optical excitation signals and the responsive optical signals are received by the second transmission element;(c) a signal collection element coupled to the second transmission element, wherein the signal collection element comprises a single pixel detector and a filter wheel comprising a plurality of spectral filters, wherein the signal collection element is configured to receive the responsive optical signals from the second transmission element and temporally split the responsive optical signals into a plurality of temporally distinct spectral bands ...

SPECTROMETRIC APPARATUS AND SPECTROMETRIC METHOD

A spectrometric apparatus includes: an excitation light source that outputs excitation light to a measurement target; a light source control section that controls driving of the excitation light source; and a measurement section that performs spectrometry of light reflected by the measurement target, in which a plurality of types of the excitation light sources are provided corresponding to a plurality of types of fluorescence having different peak wavelengths, and in which the light source control section sequentially changes the excitation light sources to be turned on in a manner to turn on one type of the excitation light sources among the plurality of types of the excitation light sources and turn off other types of excitation light sources. 1. A spectrometric apparatus comprising:an excitation light source that outputs excitation light to a measurement target;a light source controller that controls driving of the excitation light source; anda measurement section that performs spectrometry of light reflected by the measurement target,wherein a plurality of types of the excitation light sources are provided corresponding to a plurality of types of fluorescence having different peak wavelengths, andwherein the light source controller sequentially changes the excitation light sources to be turned on in a manner to turn on one type of the excitation light sources among the plurality of types of the excitation light sources and turn off other types of excitation light sources.2. The spectrometric apparatus according to claim 1 ,wherein the excitation light source includes a first excitation light source that outputs first excitation light having a peak wavelength in a wavelength range of 420 nm or more and less than 490 nm.3. The spectrometric apparatus according to claim 1 ,wherein the excitation light source includes a second excitation light source that outputs second excitation light having a peak wavelength in a wavelength range of 490 nm or more and less than ...

Infrared cie methodology for chemical group classification

The apparatus includes a standard computer processor in operation receiving a plurality of stimulus-value signals. The apparatus includes a standard computer-readable medium storing instructions that, when executed by the processor, cause the processor to carry out a method for identifying at least one chemical of interest. The method includes the following. A chromaticity chart including a plurality of chemical groupings is generated. The at least one chemical of interest is classified as belonging to a respective chemical grouping of the plurality of chemical groupings based on the chromaticity chart and the plurality of stimulus-value signals. Optionally, the chromaticity chart includes a molecular vibrational chart. Optionally, the molecular vibrational chart includes a plurality of infrared molecular vibrational signatures of a plurality of target chemicals, a plurality of Raman molecular vibrational signatures of the plurality of target chemicals, or a plurality of terahertz molecular vibrational signatures of the plurality of target chemicals.

Wavelength tunable light source

Provided is a wavelength tunable light source including a super luminescent diode (SLD) generating lights in a predetermined wavelength band, a voltage generating unit generating first and second voltages, a first filter receiving the first voltage from the voltage generating unit, receiving the lights from the SLD, and transmitting, as second lights, lights corresponding to wavelengths separated by a free spectral range (FSR) from each other among the received lights, a second filter receiving the second voltage from the voltage generating unit, receiving the second lights from the first filter, and transmitting, as a third light, a light corresponding to one wavelength among the separated wavelengths among the received second light, and a reflective mirror disposed at an output end of the second filter and reflects the third light transmitted from the second filter.

Spatial light modulator spectroscopy

In described examples, a spatial light modulator includes groups of pixels. Each group is arranged to transmit only a respective portion of a light spectrum. The respective portion has a respective dominant color. The respective portions of the light spectrum are distinct from one another, according to their respective dominant colors. Each group is controlled by a respective reset signal. The spatial light modulator is coupled to receive a selection from the integrated circuit and in response to the selection: cause a selected one of the groups to transmit its respective portion of the light spectrum; and cause an unselected one of the groups to block transmission of its respective portion of the light spectrum. A photodetector is coupled to: receive the respective portion of the light spectrum transmitted by the selected group; and output a signal indicating an intensity thereof.

COMPACT PORTABLE COLOR SENSOR

The present concept is a compact portable colour sensor for measuring colour of a substrate. The sensor includes a lower housing including an interior, the lower housing for cooperatively mating together with a upper housing, a detector portion including a printed circuit board rigidly connected to an interior of the lower housing and substantially enveloped by the upper and lower housings when in a mated position The printed circuit board includes at least one LED and one colour sensor mounted on a bottom side of the printed circuit board, and at least one transparent light transmitting light pipe and a transparent lens is mounted interferingly between the bottom side of the printed circuit board and the interior of the lower housing, and wherein the compact portable colour sensor is configured such that light transmitted by the LED impinges upon the substrate and is at least partially reflected back to the colour sensor to take a measurement. Preferably wherein the lower housing has an inverted truncated conical shape and the upper housing has an upright truncated conical shape. 1. A compact portable colour sensor for measuring colour of a substrate the sensor comprising:f) a lower housing including an interior, the lower housing for cooperatively mating together with an upper housing;g) a detector portion including a printed circuit board rigidly connected to the interior of the lower housing and substantially enveloped by the upper and lower housings when in a mated position;h) wherein the printed circuit board includes at least one LED and one colour sensor mounted on a bottom side of the printed circuit board;i) at least one transparent light transmitting light pipe and a transparent lens mounted which is mounted interferingly between the bottom side of the printed circuit board and the interior of the lower housing;j) wherein the compact portable colour sensor is configured such that light transmitted by the LED impinges upon the substrate and is at least ...

Systems for Providing Illumination in Optical Metrology

A system for providing illumination to a measurement head for optical metrology is configured to combine illumination beams from a plurality of illumination sources to deliver illumination at one or more selected wavelengths to the measurement head. The intensity and/or spatial coherence of illumination delivered to the measurement head is controlled. Illumination at one or more selected wavelengths is delivered from a broadband illumination source configured for providing illumination at a continuous range of wavelengths. 1. A system for providing illumination to a measurement head , comprising:a broadband illumination source;one or more multi-mode optical fibers configured deliver illumination from the broadband illumination source along an illumination path to a measurement head; anda filter mechanism disposed between the broadband illumination source and the one or more multi-mode optical fibers, the filter mechanism configured to allow illumination at a selected wavelength to be delivered along the illumination path.2. The system of claim 1 , wherein the filter mechanism includes an plurality of narrowband dielectric thin film filters.3. The system of claim 1 , wherein the filter mechanism includes a tunable dielectric filter.4. The system of claim 1 , wherein the filter mechanism is further configured to allow unfiltered illumination to be delivered along the illumination path.5. The system of claim 1 , wherein the filter mechanism includes a monochromator with a rotating dispersive element.6. The system of claim 1 , wherein the filter mechanism includes a dispersive element configured to direct portions of illumination at selected wavelengths along a plurality of optical fibers.7. The system of claim 1 , wherein the one or more multi-mode optical fibers have selected numerical aperture and selected core size based upon etendue of at least one of the broadband illumination source and the measurement head.8. The system of claim 1 , wherein the broadband ...

INFORMATION PROCESSING DEVICE AND METHOD OF CONTROLLING IMAGE FORMING APPARATUS

An information processing device includes: an acquisition unit configured to acquire color information on a specific color included in an inspection image, and a determination condition for determining a color shift with respect to the specific color; and a controller configured to: determine, based on the color information and the determination condition acquired by the acquisition unit, test image data representing a plurality of test images to be formed by an image forming apparatus; output the determined test image data to the image forming apparatus in order to form the plurality of test images; acquire luminance data on the plurality of test images, the luminance data being output from a color sensor; acquire spectral data on the plurality of test images, the spectral data being output from a spectroscopic sensor. 1. An information processing device comprising:an acquisition unit configured to acquire color information on a specific color included in an inspection image, and a determination condition for determining a color shift with respect to the specific color; and determine, based on the color information and the determination condition acquired by the acquisition unit, test image data representing a plurality of test images to be formed by an image forming apparatus;', 'output the determined test image data to the image forming apparatus in order to form the plurality of test images;', 'acquire luminance data on the plurality of test images, the luminance data being output from a color sensor;', 'acquire spectral data on the plurality of test images, the spectral data being output from a spectroscopic sensor;', 'generate, based on the spectral data and the luminance data, a conversion condition for converting a reading result obtained by the color sensor;', 'acquire luminance data on an image to be formed by the image forming apparatus, the luminance data on the image to be formed by the image forming apparatus being output from the color sensor;', ' ...

Spectrometer with a relay lightpipe

A lightpipe is coupled to a spectrometer based on a laterally variable optical filter. The lightpipe may be used for both guiding the illuminating light towards a sample and collecting light reflected or emitted by the sample upon illumination, for spectral measurements at a distance from the sample afforded by the lightpipe. The lightpipe may include a slab of homogeneous transparent material for unconstrained bidirectional propagation of light in bulk of the material. The lightpipe may be solid, hollow, or sectioned for separated guiding of the illuminating and the reflected light.

Colorimeter

Colorimeter having first and second illumination units disposed symmetrically to a reference line in a prescribed plane, first and second light-receiving parts disposed symmetrically to the reference line in the prescribed plane, a calculation unit for determining color information about a measurement object, and an opposing wall that opposes the measurement object when it is measured. The opposing wall has an abutting part that abuts the measurement object when it is measured. The abutting part has a pair of first abutting parts disposed on two sides of a measurement opening to flank the measurement opening; and a pair of second abutting parts disposed on an orthogonal line orthogonal to a first-abutting-part connection line that connects the pair of first abutting parts to each other, the pair of second abutting parts being disposed on two sides of the first-abutting-part connection line to flank the first-abutting-part connection line. 1. A colorimeter that performs colorimetry of a measurement object , the colorimeter comprising:a first illumination part that radiates first illumination light toward an intersection point between an opening plane of a measurement opening and a prescribed reference line intersecting with the opening plane, at a prescribed first incident angle with respect to the reference line;a second illumination part that is disposed diametrically opposite to a first disposing position of the first illumination part with respect to the reference line and symmetrically with the first illumination part with the reference line as a line of symmetry, and radiates second illumination light toward the intersection point;a first light-receiving part that is disposed in a plane including the first disposing position of the first illumination part, the reference line, and a second disposing position of the second illumination part, and receives light from the intersection point by facing the intersection point at a prescribed first observation angle ...

RAMAN SPECTROSCOPY USING DIFFRACTIVE MEMS

A Raman spectrometer including a laser excitation source, edge filters, and detection optics that direct light into a spectrograph. A spectrograph containing a dispersive element and optics that directs various wavelengths of light onto a segmented diffractive MEMS light modulator array. The MEMS array, depending on actuation state, directs light either to or away from a single detector. Control electronics drive the MEMS light modulator for either sequential wavelength measurement or multiplexed wavelength measurement (Hadamard for example). 1. A method comprising:a. exciting a sample with a laser to generate a sample signal;b. passing the excited sample signal through an edge filter;c. passing the excited sample signal from the edge filter through a slit and collimating lens;d. reflecting the passed signal off a diffraction grating;e. passing the diffracted signal through a first focusing lens on to a diffractive MEMS array having segments, each segment corresponding to a specific wavelength;f. passing signal from multiple segments corresponding to specific wavelengths through the first focusing lens;g. reflecting the multiple segment signal corresponding to the specific wavelengths off the diffraction grating; andh. passing the reflected multiple segment signal corresponding to the specific wavelengths through a second focusing lens and on to a single detector.2. The method of claim 1 , wherein the diffractive MEMS array is a segmented light modulator with diffractive segments or pixels.3. The method of claim 1 , wherein the diffractive MEMS array and the detector are connected to a controller.4. The method of claim 3 , wherein the controller provides control signals to the segmented diffractive MEMS array.5. The method of claim 1 , wherein the single detector is a visible or near infrared (IR) detector.6. The method of claim 1 , wherein the laser has an operating range of 0.2-2 microns.7. A method comprising:a. exciting a sample with a laser to generate a sample ...

METHOD AND ARRANGEMENT FOR ACTUATING A WAVELENGTH-TUNABLE LASER DIODE IN A SPECTROMETER

Method in which, in order to actuate a wavelength-tunable laser diode in a spectrometer, a power-time function is predetermined instead of a current-time function, wherein the laser diode is tuned periodically over a wavelength range in accordance with the power-time function. For this purpose, a current profile (i) with which the laser diode is actuated is determined from the power-time function and measured values of the voltage (u) present at the laser diode. 1. A method for actuating a wavelength-tunable laser diode in a spectrometer , comprising:predetermining a power-time function;driving the laser diode with a current profile determined from the predetermined power-time function and measured values obtained from the laser diode to periodically tune the laser diode over a wavelength range in accordance with the predetermined power-time function;wherein the measured values are obtained from a voltage present at the laser diode.2. The method as claimed in claim 1 , wherein the current profile is generated by a closed-loop control device depending on a system deviation between a power consumption of the laser diode as an actual variable and the predetermined power-time function as a setpoint variable; and wherein the voltage present at the laser diode and the current (i) through the laser diode are continuously detected and the power consumption of the laser diode is continuously determined by multiplication of the measured current and voltage values.3. The method as claimed in claim 1 , wherein a computation model is utilized which describes a current-voltage characteristic of the laser diode depending on predetermined component parameters of the laser diode; and wherein the voltage present at the laser diode and the current through the laser diode are regularly determined at different times claim 1 , and component parameters are recalculated based on determined current and voltage values; and wherein the current profile with which the laser diode is driven is ...

OPTICAL SPECTROSCOPIC MEASUREMENT SYSTEM

A system capable of highly sensitive measurement of material concentration values in a sample using an optical spectroscopic method is disclosed. The system utilizes high-speed data acquisition and high resolution sampling of the raw signals output by the sensors with reduced total channel counts, and performs frequency analysis of the signals using the Fourier transform method to process all sensor channels in parallel. When each sensor is targeting the detection of some certain materials at some certain frequencies, the system is capable of simultaneous detection of multiple materials of interest in the sample with high measurement sensitivity and high speed. 1. A system for measuring material concentration values in a sample , comprising:a plurality of laser sources modulated at different frequencies, each laser source emits light into the sample;a plurality of sensors to detect output signals from the sample;a signal combiner module to combine the output signals detected by the plurality of sensors into a combined signal;a data acquisition (DAQ) device to digitize the combined signal;a Fourier transform unit to perform a Fourier transform on the digitized signal to obtain signal intensity at each of the modulation frequencies in parallel; anda digital signal processor to calculate the material concentration values in the sample.2. The system of claim 1 , wherein the plurality of laser sources are wavelength modulated or intensity modulated.3. The system of claim 1 , wherein the plurality of sensors have different resonant frequencies.4. The system of claim 1 , wherein the plurality of sensors are quartz tuning fork (QTF) sensors.5. The system of claim 1 , wherein the signal combiner module is a trans-impedance amplifier or a voltage adding circuit.6. The system of claim 1 , wherein the DAQ device digitizes the combined signal at a sampling rate that is at least the Nyquist sampling rate.7. A method for measuring material concentration values in a sample claim 1 ...

SPECTRAL READING USING SYNCHRONIZED LED SOURCES

A system for spectral reading includes a plurality of LEDs, an interface, and a processor. The plurality of LEDs are disposed in a physical array. Light from the plurality of LEDs is enabled to be collimated at a Fabry-Perot etalon. The interface is configured to receive a gap calibration table and power characteristics of a plurality of LEDs. The processor is configured to determine an LED switch table. The LED switch table indicates a set of the plurality of LEDs with power above a threshold at a plurality of wavelengths. The processor is further configured to cause measurement of a sample using the gap calibration table and the LED switch table for a set of gap values and determine measurement results. 1. A system for spectral reading , comprising:a plurality of LEDs, wherein the plurality of LEDs are disposed in a physical array, and wherein light from the plurality of LEDs is enabled to be collimated at a Fabry-Perot etalon; receive a gap calibration table; and', 'receive power characteristics of a plurality of LEDs; and, 'an interface configured to determine an LED switch table, wherein the LED switch table indicates a set of io the plurality of LEDs with power above a threshold based at least in part on the power characteristics of the plurality of LEDs;', 'cause measurement of a sample using the gap calibration table and the LED switch table for a set of gap values; and', 'determine measurement results., 'a processor configured to2. The system of claim 1 , wherein the gap calibration table indicates one or more spectral peaks for a gap value of the set of gap values.3. The system of claim 2 , wherein a spectral peak of the one or more spectral peaks for the gap value of the set of gap values comprises a center of a pass band for a Fabry-Perot etalon.4. The system of claim 1 , wherein a power characteristic of an LED of the plurality of LEDs comprises a characteristic of emitted light power vs. light wavelength.5. The system of claim 1 , wherein the LED ...

Methods and means for multispectral imaging

Multispectral imaging of samples, in particular of biological tissues. A method for acquisition of fluorescence and reflectance images of an object including alternatingly illuminating the object with at least a first light having several spectral regions of high intensity, wherein the first light has at least one region of low intensity that is of longer wavelength to a region of high intensity, and at least a second light having at least one spectral region of high intensity, recording a first image of the object during illumination of the object with the first light and a second image of the object during illumination of the object with the second light using a common sensor array, wherein the light recorded by the sensor array is attenuated in at least one of the spectral regions in which the first light has high intensities.

SPECTROMETER COMPRISING A SPATIAL LIGHT MODULATOR

A spectrometer comprising an input for optical radiation; a dispersion element, such as a concave focussing reflection diffraction grating, for dispersing incident optical radiation passing from the input by wavelength; an output and a spatial light modulator “SLM” disposed to receive a wavelength region of in-put optical radiation dispersed by the dispersion element and operable to selectively direct wavelength portions of the received wavelength region for receipt at the output. The input is configured to provide a plurality of entrance field stops, such as entrance slits, by means of each of which the dispersion element is, in use, illuminated and each of which is positioned to cooperate with the dispersion element to generate a different dispersed wavelength region at the SLM. 1. A spectrometer comprising an input for optical radiation; a dispersion element for dispersing optical radiation passing from the input by wavelength; an output and a spatial light modulator disposed to receive a wavelength region of input optical radiation dispersed by the dispersion element and operable to selectively direct wavelength portions of the received wavelength region for receipt at the output characterised in that the input is configured to provide a plurality of entrance field stops by means of each of which the dispersion element is , in use , illuminated and each of which is positioned to cooperate with the dispersion element A to generate a different dispersed wavelength region at the SLM.2. A spectrometer as claimed in wherein there are provided a plurality of optical radiation sources each for illuminating the dispersion element by means of an associated different entrance filed stop claim 1 , and in that each source is configured to generate optical radiation having a wavelength range substantially that of the dispersed wavelength region incident at the SLM generated by its associated entrance field stop.3. A spectrometer as claimed in wherein a controller is provided ...

METHOD OF FABRICATING A LIGHT EMITTER

A method of fabricating a light emitter including several sources and a support. Each source is arranged so as to emit a light beam at a working wavelength. For each source, a position of this source along a fixing direction is determined, as a function of optical properties of a spectral multiplexer to be associated with this emitter, of the working wavelength of this source and of a placement of the emitter with respect to the multiplexer. These positions are determined so that, when the emitter is associated with the multiplexer, the multiplexer spatially superimposes the light beams. Next, each source is fixed, along the fixing direction, on the support at its position previously determined, so that the sources are distributed according to the law or properties of chromatic dispersion of the spectral multiplexer. Advantageously, the sources may be fixed on several parallel fixing axes extending along the fixing direction. 120-. (canceled)2112. Method for fabricating a light emitter () comprising several separate light sources (S , S , S) and a support () common to all the sources , each source (S , S , S) being arranged in order to emit a light beam at a wavelength called working wavelength (λ , λ , λ) , each source being a light-emitting diode , each source having a working wavelength different from the working wavelength of the other sources , characterized in that it comprises:{'sub': 1', 'i', 'N', '1', 'i', 'N, 'b': 3', '4', '5', '6', '5', '6', '4, 'for each source, determining a position (X, X, X) of this source along a fixing direction (), as a function of optical properties of a spectral multiplexer () planned to be associated with this emitter, as a function of the working wavelength of this source and as a function of a placement () of the emitter with respect to the multiplexer, the spectral multiplexer comprising an optical assembly () comprising a lens and/or a prism and having chromatic aberration properties of the lens and/or of the prism; the ...

CONCURRENT ACTIVATION OF MULTIPLE ILLUMINATION SOURCES FOR SAMPLE ANALYSIS

Technologies are generally described for concurrent activation of multiple illumination sources to analyze a sample. A controller may be configured to activate the illumination sources substantially simultaneously, where a current or voltage of each activated illumination source is modulated at a different frequency by respective circuit drivers of the controller. Each activated illumination source may be configured to illuminate the sample with light at a different emission wavelength, and one or more detectors may be configured to detect a composite signal from the sample in response to the illumination. The composite signal may include multiple returned signals, where each returned signal corresponds to light emitted from one of the activated illumination sources at a respective emission wavelength. One or more filters, each associated with a respective modulation frequency of one activated illumination source, may be configured to extract each returned signal from the composite signal for analysis. 1. An apparatus comprising:a plurality of illumination sources configured to illuminate a sample with light, wherein each of the plurality of illumination sources has a different emission wavelength;a controller configured to activate the plurality of illumination sources substantially simultaneously, wherein each of the plurality of illumination sources are configured to be activated at a different modulation frequency; andone or more detectors positioned adjacent to the plurality of illumination sources, wherein the one or more detectors are configured to detect a composite signal from the sample in response to the illumination, wherein the composite signal comprises a plurality of returned signals, each of the plurality of returned signals corresponding to light emitted from one of the plurality of illumination sources at a respective emission wavelength.2. The apparatus of claim 1 , wherein the controller includes a plurality of driver circuits claim 1 , and ...

Sample Analysis Methods

The invention generally relates to methods for analyzing a heterogeneous sample. In certain aspects, the invention provides methods that involve illuminating a heterogeneous sample including a target analyte with polychromatic light, receiving luminous data of the heterogeneous sample and the target analyte is received to a detector without splitting the polychromatic light into individual wavelengths and generating spectral data therefrom. The analysis can be conducted without reacting the target analyte with chemical reagents. 1. A method for analyzing a heterogeneous sample , the method comprising:illuminating a heterogeneous sample comprising at least one target analyte with polychromatic light; andreceiving a luminous signal of the heterogeneous sample and the at least one target analyte to a detector without splitting the polychromatic light into individual wavelengths and generating spectral data therefrom, thereby analyzing the heterogeneous sample,wherein the method is conducted without reacting the at least one target analyte with a chemical reagent.2. The method of claim 1 , wherein the sample is at least one selected from the group consisting of a biological sample claim 1 , an environmental sample claim 1 , a food product sample claim 1 , and a beverage product sample.3. The method of claim 2 , wherein the biological sample is a human tissue or body fluid sample4. The method of claim 3 , wherein the body fluid sample is a blood sample.5. The method of claim 2 , wherein the body fluid sample is a urine sample.6. The method of claim 1 , further comprising analyzing the spectral data to obtain a concentration of the at least one target analyte.7. The method of claim 6 , wherein analyzing comprises comparing the spectral data to reference spectral data in which relative absorption of at least one reference analyte and concentration of the at least one reference analyte are known.8. The method of claim 1 , wherein the sample is a human tissue or body fluid ...

Multi-Angle Colorimeter

First and second measurement operations are performed according to each of a plurality of geometric conditions while keeping the geometric condition. In the first measurement operation, illumination light is radiated from a first light radiating position toward a measurement target position and spectroscopic measurement is performed on reflected light traveling from the measurement target position toward a first light receiving position. In the second measurement operation, illumination light is radiated from a second light radiating position toward a measurement target position and spectroscopic measurement is performed on reflected light traveling from the measurement target position toward a second light receiving position. The two spectroscopic measurement results are averaged. The second light radiating position and the second light receiving position are respectively disposed symmetrical to the first light radiating position and the first light receiving position with respect to a reference axis. 1. A multi-angle colorimeter comprising:a light illuminating and receiving optical system that has a plurality of light radiating positions symmetrically arranged with respect to a reference axis passing through a measurement target position, has a plurality of light receiving positions symmetrically arranged with respect to the reference axis, radiates illumination light from each of the plurality of light radiating positions toward the measurement target position, receives reflected light traveling from the measurement target position toward each of the plurality of light receiving positions, and arranges the plurality of light radiating positions and the plurality of light receiving positions so that radiation of the illumination light and reception of the reflected light under a plurality of geometric conditions defining a light illuminating angle and a light receiving angle are possible;a measurement mechanism that performs a colorimetric process on the reflected ...

APPARATUS AND METHODOLOGIES FOR LEAK DETECTION USING GAS AND INFRARED THERMOGRAPHY

Apparatus and methodologies relating to improved gas detection in closed systems are provided. More specifically, the present systems provide for the mixing, conditioning and production of a detection gas comprising, for example, predetermined ratios of nitrogen and methane gas, such predetermined ratios operative for enhancing imaging of gas leaks detected using infrared thermography imaging. 1. A method of detecting a gas leak in a closed system , the method comprising:providing at least one carrier gas and at least one tracer gas,mixing at least a portion of the tracer gas and at least a portion of the carrier gas to form a detector gas having a specific ratio of carrier gas to tracer gas,determining, from a continuous sub-stream of the detector gas, the ratio of carrier gas to tracer gas within the detector gas, andadjusting the portion of the carrier gas, the portion of the tracer gas, or a combination thereof, to maintain the ratio of carrier gas to tracer gas within the detector gas,introducing the detector gas to the closed system, andobtaining infrared thermography images of the closed system to detect gas leaking from the system.2. The method of claim 1 , wherein determining the ratio of carrier gas to tracer gas in the produced detector gas may comprise obtaining infrared thermography images of the sub-stream of detector gas.3. The method of claim 1 , wherein the carrier gas may comprise an inert gas.4. The method of claim 3 , wherein the inert gas may be nitrogen.5. The method of claim 1 , wherein the tracer gas may comprise a natural gas.6. The method of claim 5 , wherein the tracer gas may comprise methane gas.7. The method of claim 1 , further comprising heating the detector gas being produced prior to introducing the detector gas to the closed system.8. The method of claim 7 , wherein the detector gas may be heated to at least between about 40° C.-about 50° C.9. The method of claim 7 , wherein the detector gas may be heated to at least about 40° C.10 ...

DETECTION OF PHYSICAL FORENSIC EVIDENCE

Detecting physical forensic evidence on a surface includes contacting the surface with a composition, the composition including a rare-earth metal and a chelator. The composition contacting the surface is illuminated with electromagnetic radiation configured to cause the composition to fluoresce in a pattern indicative of physical forensic evidence. The pattern indicative of physical forensic evidence can then be captured. The composition can be made by combining a rare-earth metal, a chelator, and a solvent to form a solution, precipitating the rare-earth metal and the chelator in the solution, and isolating the precipitate of the rare-earth metal and the chelator from a remainder of the solution. The resulting composition includes a porous metal-organic framework of a rare-earth metal and a chelator, where the pores range in diameter from about 0.01 nm to about 50 nm. 1. A method of detecting physical forensic evidence on a surface comprising:contacting the surface with a composition, the composition including a rare-earth metal and a chelator;illuminating the composition contacting the surface with electromagnetic radiation configured to cause the composition to fluoresce in a pattern indicative of physical forensic evidence;capturing the pattern indicative of physical forensic evidence.2. The method of claim 1 , wherein the composition comprises a plurality of particles claim 1 , each particle including the rare-earth metal and the chelator.3. The method of claim 2 , wherein each particle is about 10 micrometers or less in at least one dimension.4. The method of claim 1 , wherein the composition comprises a porous metal-organic framework of the rare-earth metal and the chelator.5. The method of claim 4 , wherein the porous metal-organic framework of the rare-earth metal and the chelator includes pores ranging in diameter from about 0.01 nm to about 50 nm.6. The method of claim 1 , wherein the rare-earth metal includes a member of a group consisting of: dysporium ...

Optical Module, Electronic Device, And Driving Method

An optical module includes a wavelength variable interference filter having a fixed reflective film, a movable reflective film which faces the fixed reflective film with a gap between reflective films interposed therebetween, and an electrostatic actuator that changes the gap between reflective films, and a gap control unit that controls the electrostatic actuator. The gap control unit controls the electrostatic actuator on the basis of an order which is set in accordance with a wavelength to be measured, and changes the gap between the reflective films. 1. (canceled)2. A driving method of a wavelength variable interference filter , the wavelength variable interference filter including a pair of mirrors separated by a gap , an actuator that controls a wavelength of measurement light emitted by the wavelength variable interference filter by varying a size of the gap between the pair of mirrors , a voltage controller that selectively applies voltages to the actuator , and a controller that instructs the voltage controller as to which of the voltages to apply , the method comprising:selecting a first wavelength of the measurement light that is measurable at both a first gap size and a second gap size between the pair of mirrors, the second gap size being greater than the first gap size;determining whether the first gap size is less than a predetermined threshold gap size and, if the first gap size is less than the predetermined threshold gap size, the controller instructs the voltage controller to apply a first voltage to the actuator, which sets the gap between the pair of mirrors to the second gap size; andmeasuring the first wavelength of the measurement light.3. The driving method of wavelength variable interference filter according to claim 2 , wherein if the first gap size is greater than the predetermined threshold gap size claim 2 , the controller instructs the voltage controller to apply a second voltage to the actuator claim 2 , which sets the gap between the ...

Mobile-based spectrum imaging device and method for controlling same

The present invention provides a mobile-based spectrum imaging device and a method for controlling the same. A mobile-based spectrum imaging device according to an embodiment of the present invention may comprise: an optical fiber for emitting, in a beam form, light which has been collected from a light source; a linear filter which is movably installed, divides the light emitted from the optical fiber into particular wavelength bands, and makes the divided light have a wavelength band changing according to the incidence location of the light; and a control unit for controlling the location of the linear filter such that the location of incident light is changed on the linear filter.

Dedicated Transformation Spectroscopy

The invention relates to a multi-channel spectrometer device () for detecting/quantifying a predetermined analyte () in a medium (). The device () comprises an input () for receiving radiation (), a first plurality of optical modulators () adapted for transforming the radiation () in accordance with a first transfer function, and a second plurality of optical modulators () adapted for transforming the radiation () in accordance with a second transfer function. The spectrometer device also comprises a detector () for generating output signals () indicative for the intensity of each transformed radiation signal. The ratio of the number of optical modulators in the first plurality and the number of optical modulators in the second plurality is determined by the ratio of a reference spectrum of the predetermined analyte transformed by the first transfer function and the reference spectrum transformed by the second transfer function. 1. A multi-channel spectrometer device for detecting and/or quantifying a predetermined analyte of interest in a medium , the spectrometer device comprising:an input for receiving a radiation signal,a first plurality of optical modulators operably connected to the input, each optical modulator of the first plurality of optical modulators being adapted for transforming the radiation signal in accordance with a first transfer function into a plurality of transformed radiation signals of the first plurality of optical modulators;a second plurality of optical modulators operably connected to the input, each optical modulator of the second plurality of optical modulators being adapted for transforming the radiation signal in accordance with a second transfer function into a plurality of transformed radiation signals of the second plurality of optical modulators; andat least one detector element operably connected to the first and second plurality of optical modulators and adapted for generating a plurality of output signals indicative an ...

Hyperspectral imaging in a light deficient environment

An endoscopic imaging system for use in a light deficient environment includes an imaging device having a tube, one or more image sensors, and a lens assembly including at least one optical elements that corresponds to the one or more image sensors. The endoscopic system includes a display for a user to visualize a scene and an image signal processing controller. The endoscopic system includes a light engine having an illumination source generating one or more pulses of electromagnetic radiation and a lumen transmitting one or more pulses of electromagnetic radiation to a distal tip of an endoscope.

SPECTROSCOPIC APPARATUS

A light radiating portion () radiates light with wavelength λ having predetermined absorptivity for an object () and light with wavelength λ having smaller absorptivity for the object () than the wavelength λ, to a target, so as to scan in 2-dimensional directions. A light receiving portion () receives scattered lights reflected by the target based on light with wavelength λ and light with wavelength λ. A measuring portion () generates information used for detection of the object () at the target, based on difference between the two scattered lights with wavelength λ and wavelength λ received by the light receiving portion (). An output portion () outputs whether or not the object is present at the target, by 2-dimensional area information, based on scanning by the light radiating portion () and information generated by the measuring portion (). 1. A spectroscopic apparatususing light having a first wavelength which has a predetermined absorptivity for a specific object, and light having a second wavelength which has a smaller absorptivity for the specific object than the first wavelength, the spectroscopic apparatus comprising:a light radiating portion configured to radiate, to a target, collimated light with the first wavelength which is obtained by the light having the first wavelength being substantially collimated, and collimated light with the second wavelength which is obtained by the light having the second wavelength being substantially collimated;a light receiving portion configured to receive first scattered light obtained by the collimated light with the first wavelength transmitting through the target or being reflected by the target, and second scattered light obtained by the collimated light with the second wavelength transmitting through the target or being reflected by the target; anda measuring portion configured to generate information to be used for detection of the specific object at the target, based on a difference between the first scattered ...

ANALYZER AND WARM-UP DETERMINATION METHOD

A spectrophotometer comprises a control unit with a warming-up determination unit that determines the completion of a warming-up based on a variation amount of a detection signal in a predetermined duration when a light detector detects a light from a sample chamber without loading the sample. Specifically, the warming-up determination unit calculates a difference between a signal intensity of the detection signal detected by the light detector at the time when the predetermined time passes and a signal intensity of the detection signal detected by the light detector at a previous time and determines that a warming-up is complete when a value of the difference is less than a first threshold value. The warming-up determination unit automatically determines the completion of warming-up independently from the determination by the user. 1. An analytical instrumentation , comprising:a sample chamber that loads a sample;a light source that radiates a light to a position of said sample in said sample chamber;a light detector that detects said light from said sample chamber; anda warming-up determination unit that determines completion of warming-up of said analytical instrumentation based upon a variation amount of a detection signal in a predetermined duration when said light detector detects said light from said sample chamber without loading said sample;wherein said warming-up determination unit determines that a difference between a measurement value at a time when said predetermined duration passes and a measurement value at a previous time thereof is less than a threshold value every time when said predetermined duration passes, and that said warming-up is complete when said difference less than said threshold value takes place multiple continuous times.2. The analytical instrumentation claim 1 , according to claim 1 , wherein:said warming-up determination unit determines that said warming-up is complete based on at least one variation amount selected from a group ...

SYSTEMS AND METHODS FOR TESTING TWO-COLOR DETECTORS

A method for calibrating a test light to simulate a fire includes measuring a baseline resistance induced in a sensor cell of a two-color detector in response to a controlled fire. The method includes monitoring a test resistance induced in the sensor cell in response to exposure to emissions from a test light and adjusting the emissions of the test light until the test resistance of the sensor cell equals the baseline resistance of the sensor cell to achieve a calibration setting for the test light. A test light for a detector includes a housing and a first LED within the housing having a first emission wavelength. A second LED is within the housing. The second LED has a second emission wavelength. The second emission wavelength is different than the first emission wavelength. 1. A method for calibrating a test light to simulate a fire comprising:measuring a baseline resistance induced in a sensor cell of a two-color detector in response to a controlled fire;monitoring a test resistance induced in the sensor cell in response to exposure to emissions from a test light; andadjusting the emissions of the test light until the test resistance of the sensor cell equals the baseline resistance of the sensor cell to achieve a calibration setting for the test light.2. The method for calibrating as recited in claim 1 , wherein measuring the baseline resistance includes measuring and collecting waveform data based on the response from the two-color detector using an oscilloscope and calculating the baseline resistance across the sensor cell based on the waveform data.3. The method for calibrating as recited in claim 1 , wherein monitoring the test resistance induced in the sensor cell in response to exposure to the emissions from the test light includes generating the emissions at a given wavelength with at least one LED of the test light and directing the emissions at an input of the two-color detector.4. The method for calibrating as recited claim 3 , wherein generating the ...

Multi-dispersive spectrometer

A multi-dispersive spectrometer is provided in which the spectrometer comprises an an optical system configured to direct an excitation signal from an excitation light source toward a sample, receive a spectroscopy signal from the sample, and direct the spectroscopy signal toward the detector. The optical system comprises a movable optical component adapted to move the spectroscopy signal relative to at least one sensor of the detector and the detector is adapted to detect a plurality of discrete shifted spectroscopy signals. A method of obtaining a Raman spectrum from a sample is also provided. The method comprises directing an excitation signal from an excitation light source toward a sample; receiving a spectroscopy signal from the sample; and directing the spectroscopy signal toward a detector, wherein the spectroscopy signal is moved relative to at least one sensor of the detector to provide a plurality of discrete shifted spectroscopy signals.

Hyperspectral imaging with tool tracking in a light deficient environment

An endoscopic imaging system for use in a light deficient environment includes an imaging device having a tube, one or more image sensors, and a lens assembly including at least one optical elements that corresponds to the one or more image sensors. The endoscopic system includes a display for a user to visualize a scene and an image signal processing controller. The endoscopic system includes a light engine having an illumination source generating one or more pulses of electromagnetic radiation and a lumen transmitting one or more pulses of electromagnetic radiation to a distal tip of an endoscope.

Extre occult blood inspection method and apparatus thereof

This invention discloses an excreta occult blood inspection method and the apparatus thereof. The inspection method comprises the following steps. At least one light source is provided to emit at least one light to illuminate excreta to produce at least one specimen light. At least one photo-sensitive unit is provided to receive the specimen light and generate a detected data. An analysis processor is provided to receive and analyze the detected data to produce an analysis data. Above-mentioned method and apparatus can make excreta occult blood inspection become efficient and convenient.

Spectral Filter Module, Spectroscopic Camera, And Electronic Device

A spectral filter module includes a spectral filter that splits light having a wavelength corresponding to an input drive voltage from incident light and outputs the light, a drive unit that outputs the drive voltage based on an input wavelength command value, and a drive controller that outputs the wavelength command value and changes the wavelength command value every time a trigger signal is input from the outside.

Spectrometer, a spectrum sampling device and spectrum correction method

A spectrometer including a spectrum sampling device and a spectrometer engine is provided. The spectrum sampling device outputs an identification signal. The spectrometer engine is electrically connected to the spectrum sampling device. The spectrometer engine receives the identification signal and a spectrum. The spectrometer engine has a plurality of wavelength correction functions, and the spectrometer engine selects one of the plurality of wavelength correction functions according to the identification signal. The spectrometer engine corrects the spectrum according to the selected wavelength correction function. Moreover, a spectrum sampling device and a spectrum correction method are also provided. The spectrometer of the invention is adapted to improve accuracy of spectrum measurement.

Illumination unit with multiple light sources for generating a uniform illumination spot

An illumination unit is described that includes a first light source positioned on a first axis and a second light source on a second axis that intersects and is angularly offset with respect to the first axis. The illumination unit includes a reflector having an aperture through which the first axis extends and a reflective surface angled with respect to the first axis and second axis.

SYSTEM AND METHOD THEREOF FOR ACCURATE OPTICAL DETECTION OF AMPHIPHILES AT A LIQUID CRYSTAL INTERFACE

Systems and methods for detection of an amphiphile at a liquid crystal interface include the production of circular polarized light. A system for detecting an amphiphile at a liquid crystal interface comprises a source of white collimated light. A circular polarizer is included for circularly polarizing incoming white light. Polarized white light passes through to an LC grid including a suspended LC film and a solution in contact with the LC grid at a surface. A spectrophotometer optically detects the presence of an amphiphile at the surface by determining a change in birefringence exhibited by the suspended LC film. A method for detecting amphiphiles at a liquid crystal water interface comprises shining collimated white light on an LC cell including an LC film, polarizing the white light with a circular polarizer, adding an amphiphile to a solution in contact with the LC film, and optically detecting the presence of the amphiphile by measuring a change in birefringence exhibited by the LC film. 1100. A system for detecting an amphiphile at a liquid crystal interface , comprising:{'b': '102', 'a source of collimated white light;'}{'b': 106', '112, 'a circular polarizer , for polarizing the collimated white light;'}{'b': 130', '136, 'an LC grid including one or more cells including a suspended nematic LC film;'}{'b': 110', '109, 'a solution in contact with the LC film at a surface ; and'}{'b': 118', '109, 'a spectrophotometer which optically detects the presence of an amphiphile at the surface by determining a change in birefringence exhibited by the suspended LC film.'}2100110. The system according to claim 1 , wherein the solution comprises water.3100130132130110. The system according to claim 1 , wherein the LC grid includes one or more pins structured to keep the LC grid in contact with the solution .4100118. The system according to claim 1 , wherein the spectrophotometer separately determines both a thickness of the LC film and the change in birefringence.5100. ...

Ultra Low Power Solid State Spectral Radiometer

A spectral radiometer system, measures incoming light intensity and spectral distribution in different wavelength-bands. An additional data storage device allows recording of the measured data. The inclusive sensor system yields very high sensitivity to incoming light. Furthermore, outstanding linearity of the detector response over several orders of magnitude of incoming light is achieved. Additional benefits are ultra low power consumption and minimum size. The sensor system can be used in remote solar radiation monitoring applications like mobile solar power units as well as in long-term environmental monitoring systems where high precision and low power consumption is a necessity. 1). A method of operation of an adjustable spectral radiometer having a plurality of diodes and associated capacitors in a circuit element section spectrally sensitive to electromagnetic radiation , a computer processor having a plurality of ports including input and/or output ports , the computer processor having a program code residing in memory , and having an associated storage device , and a clock device , and wherein the program code when executed by the computer processor generates instructions causing the computer processor to perform steps of the method , the method comprising the steps of:setting, at a beginning measurement cycle at time to, a state of a first input port of the plurality of ports of the computer processor to high-ohmic status and setting a first output port to a low-ohmic status, thus charging the plurality of diodes and associated capacitors, depending on an overall capacitance across the plurality of diodes;{'b': '1', 'setting, after a settling time t, the first output port of the plurality of ports of the computer processor to high-ohmic status;'}absorbing, by each selected diode of the plurality of diodes, a specific wavelength range of incoming light depending on bandgap energy of each selected diode, causing generation and recombination of a plurality ...

Optical Module, Electronic Device, And Driving Method

An optical module includes a wavelength variable interference filter having a fixed reflective film, a movable reflective film which faces the fixed reflective film with a gap between reflective films interposed therebetween, and an electrostatic actuator that changes the gap between reflective films, and a gap control unit that controls the electrostatic actuator. The gap control unit controls the electrostatic actuator on the basis of an order which is set in accordance with a wavelength to be measured, and changes the gap between the reflective films. 1. An electronic device comprising: a first reflective film,', 'a second reflective film facing the first reflective film with a gap, and', 'an actuator configured to change the gap, so that light of a wavelength corresponding to the gap is transmitted through the first reflective film and the second reflective film,, 'a wavelength variable interference filter including;'}a single imaging unit configured to detect the light transmitted from the wavelength variable interference filter; anda gap control unit including a storage unit that stores data representing a relationship between a voltage to be applied to the actuator and a wavelength of the light to be transmitted from the wavelength variable interference filter, the gap control unit being configured to cause the actuator to change the gap by applying the voltage to the actuator according to the data;wherein the wavelength variable interference filter and the single imaging unit are configured to have the light from the wavelength variable interference filter detected only by the single imaging unit,wherein the wavelength of the light belongs to one of at least a first wavelength region and a second wavelength region that is a longer wavelength region compared with the first wavelength region,and wherein in the relationship represented by the data, the voltage corresponds to a first size of the gap that allows the light of a first order having a first ...

REFERENCE SWITCH ARCHITECTURES FOR NONCONTACT SENSING OF SUBSTANCES

This relates to systems and methods for measuring a concentration and type of substance in a sample at a sampling interface. The systems can include a light source, optics, one or more modulators, a reference, a detector, and a controller. The systems and methods disclosed can be capable of accounting for drift originating from the light source, one or more optics, and the detector by sharing one or more components between different measurement light paths. Additionally, the systems can be capable of differentiating between different types of drift and eliminating erroneous measurements due to stray light with the placement of one or more modulators between the light source and the sample or reference. Furthermore, the systems can be capable of detecting the substance along various locations and depths within the sample by mapping a detector pixel and a microoptics to the location and depth in the sample. 1. A system for measuring a concentration of a substance in a sample at a sampling interface , the system comprising:a light source configured to emit a first light including one or more wavelengths;one or more optics;one or more modulators configured to modulate at least a portion of the first light, the one or more modulators located between the one or more optics and the sampling interface;a reference comprising one or more spectroscopic properties;a first detector configured to detect the portion of the first light; and send one or more first signals to the light source, and', 'receive one or more second signals from the first detector., 'logic configured to2. The system of claim 1 , wherein the one or more modulators include an optical chopper located between the light source and the sampling interface or the reference.3. The system of claim 1 , wherein the reference is a reflector configured with a size that is greater than or equal to a size of the first light emitted from the light source.4. The system of claim 1 , further comprising a filter claim 1 , the ...