Spectrometers with retro-reflective surfaces and related instruments

The spectrometer architecture and imager described herein refer to a compact and high-throughput spectrometer. The spectrometer comprises an aperture (101), a reflecting surface (102), a dispersive element (103), an Echelle grating (104) and a single detector (105). The spectrometer reuses optical surfaces to separate wavelengths of light. For example, the reflecting surface (102) can comprise a reflective triplet telescope acting as both, a collimator and imager. By reusing optical components, the relative size of the spectrometer may be reduced. Spectrometers according to the present disclosure may be used for optical emission spectroscopy (OES).

MONOLITHIC ASSEMBLY OF REFLECTIVE SPATIAL HETERODYNE SPECTROMETER

Novel monolithic cyclical reflective spatial heterodyne spectrometers (CRSHS) are presented. Monolithic CRSHS in accordance with the invention have a single frame wherein a flat mirror, roof mirror, and symmetric grating are affixed. The invention contains only fixed parts; the flat mirror, roof mirror, and symmetric grating do not move in relation to the frame. Compared to conventional CRSHS known in the art, the present invention enables much smaller and lighter CRSHS, requires less time and skill for maintenance, and is a better economic option. The disclosed invention may include fixed field-widening optical elements or a fiber-fed assembly.

METHOD FOR PERFORMING RAMAN SPECTROSCOPY WITHIN A LOGGING WHILE DRILLING INSTRUMENT

A downhole tool has a tool body with an outer diameter equal to a borehole diameter, at least one cavity formed in and opening to an outer surface defining the outer diameter of the tool body, a light source, a filter, and a light detector mounted in the at least one cavity, and a window disposed at the opening of the at least one cavity, wherein the window encloses the cavity.

ECHELLE SPECTROMETER

SHORT-WAVE INFRARED SUPER-CONTINUUM LASERS FOR EARLY DETECTION OF DENTAL CARIES

A system and method for using near-infrared or short-wave infrared (SWIR) sources such as lamps, thermal sources, LED's, laser diodes, super-luminescent laser diodes, and super-continuum light sources for early detection of dental caries measure transmission and/or reflectance. In the SWIR wavelength range, solid, intact teeth may have a low reflectance or high transmission with very few spectral features while a carious region exhibits more scattering, so the reflectance increases in amplitude. The spectral dependence of the transmitted or reflected light from the tooth may be used to detect and quantify the degree of caries. Instruments for applying SWIR light to one or more teeth may include a C-clamp design, a mouth guard design, or hand-held devices that may augment other dental tools. The measurement device may communicate with a smart phone or tablet, which may transmit a related signal to the cloud, where additional value-added services are performed.

광원 대역폭 선택 및 제어를 위한 시스템 방법과 장치

... 대역폭 선택을 위한 메커니즘은 반사 광학 엘리먼트의 반사면을 따라 종축 방향으로 뻗어있는 입사 영역을 포함하는 분산 반사면을 구비한 바디를 가진 분산 광학 엘리먼트를 포함한다. 상기 바디는 또한 바디의 제 1 종축 단부에 배치된 제 1 단부 블록과 바디의 제 2 종축 단부에 배치된 제 2 단부 블록을 포함하고, 상기 제 2 종축 단부는 제 1 종축 단부에 대향하여 있다. 대역폭 선택 메커니즘은 또한 상기 반사면에 대향하여 있는 분산 광학 엘리먼트의 제 2 면 상에 장착된 제 1 액추에이터를 포함하고, 상기 제 1 액추에이터는 상기 제 1 단부 블록에 결합된 제 1 단부와 제 2 단부 블록에 결합된 제 2 단부를 구비하고, 상기 제 1 단부 블록과 상기 제 2 단부 블록에 동일하지만 반대방향인 외력을 인가하도록 동작한다.

Spectroanalytical systems

A spectroanalytical system includes entrance aperture defining structure for receiving radiation to be analyzed along a first path; collimating structure in the first path for providing collimated radiation along a second path; fixed refraction structure in the second path for spatially separating (refracting) radiation in the second path in a first direction as a function of wavelength; fixed echelle grating structure in the second path for spatially separating the refracted radiation as a function of wavelength in a second direction orthogonal to the first direction and directing the orthogonally dispersed radiation in a beam along a third path that does not pass through the first refraction structure; and two-dimensional array detector structure for detecting the beam of orthogonally refracted radiation.

FIELD LENS CORRECTED THREE MIRROR ANASTIGMAT SPECTROGRAPH

A spectrograph that includes camera focusing optics with a primary mirror having a concave-shaped reflective mirror surface, a secondary mirror having a convex-shaped reflective mirror surface and positioned to receive light reflected by the primary mirror, a tertiary mirror having a concave reflective mirror surface and positioned to receive light reflected by the secondary mirror, and a field correcting lens comprising a convex lens surface in combination with a concave lens surface, wherein light received by said field correcting lens from said tertiary mirror enters said convex lens surface, traverses said field correcting lens, and exits from said concave lens surface. The optional field correcting lens is positioned such that the primary mirror, secondary mirror, tertiary mirror, and the field correcting lens share the common parent vertex axis.

POLYCHROMATOR SYSTEMS AND METHODS

A polychromator system comprising: an optical element defining an aperture; a collimation mirror for receiving light via the aperture and reflecting substantially collimated light; at least a first dispersive optical component and a second dispersive optical component, each configured to disperse the substantially collimated light received from the collimation mirror by different amounts for different wavelengths and to provide cross-dispersed light having different wavelengths of light spaced along a first and second axis; and a focus mirror positioned to focus the cross-dispersed light onto a 2-D array detector to provide a plurality of aperture images of the aperture at a respective plurality of regions of the detector, each of the plurality of aperture images associated with a respective wavelength of the cross-dispersed light. Either one or both of the collimation mirror and the focus mirror is a freeform mirror having a reflective surface configured to mitigate effects of optical aberrations of the polychromator system over a plurality of the wavelengths of the cross-dispersed light along the first axis and the second axis and thereby optimise the resolution of the plurality of aperture images associated with the plurality of the wavelengths along the first axis and the second axis. 1. A polychromator system comprising:an optical element defining an aperture;a collimation mirror for receiving light via the aperture and reflecting substantially collimated light;at least a first dispersive optical component and a second dispersive optical component, each configured to disperse the substantially collimated light received from the collimation mirror by different amounts for different wavelengths and to provide cross-dispersed light having different wavelengths of light spaced along a first and second axis; anda focus mirror positioned to focus the cross-dispersed light onto a 2-D array detector to provide a plurality of aperture images of the aperture at a ...

FIELD LENS CORRECTED THREE MIRROR ANASTIGMAT SPECTROGRAPH

A spectrograph that includes a first mirror having flat a mirror reflective surface and positioned to reflect light traversing a prism, a second mirror having a concave-shaped reflective mirror surface and positioned to reflect light received from the first mirror, a third mirror having a convex-shaped reflective mirror surface and positioned to receive light reflected by the second mirror, a fourth mirror having a spheroidal reflective mirror surface and positioned to receive light reflected by the third mirror, and a field lens comprising a concave mirror surface in combination with a convex mirror surface, wherein light received by said field lens from said fourth mirror enters said convex mirror surface, traverses said field lens, and exits from said concave mirror surface. The fifth mirror is positioned such that the second mirror, third mirror, fourth mirror, and fifth mirror share a common vertex axis. 1. A spectrograph which includes five mirrors in radiative communication , comprising:a first mirror having a flat mirror reflective surface and positioned to reflect light traversing a prism;a second mirror having a concave-shaped reflective mirror surface and positioned to reflect light received from the first mirror;a third mirror having a convex-shaped reflective mirror surface and positioned to receive light reflected by the second mirror;a fourth mirror having a spheroidal reflective mirror surface and in positioned to receive light reflected by the second mirror; anda field lens comprising a concave mirror surface in combination with a convex mirror surface, wherein light received by said field lens from said fourth mirror enters said convex mirror surface, traverses said field lens, and exits from said concave mirror surface.2. The spectrograph of claim 1 , further comprising:an entrance aperture to receive light from a source; anda collimating mirror to reflect the light in a collimated pattern towards a first aperture stop, the first aperture stop ...

Compact spectrometer with high spectral resolution

A spectrometer having slit and detector elements located on the optical axis of the spectrometer, resulting in substantially increased spectral and spatial fields of the spectrometer. The spectrometer being more compact than current designs, while providing superior spatial and spectral image quality and resolution.

Anordnung und Verfahren zur Wellenlängenkalibration bei einem Echelle-Spektrometer

Spektrometer-Anordnung (10) enthaltend (a) eine Strahlungsquelle (11) mit kontinuierlichem Spektrum, (b) einen Vormonochromator (2), (c) ein dem Vormonochromator nachgeordnetes Echelle-Spektrometer (4) mit Mitteln zur Wellenlängenkalibrierung, (d) einen Eintrittsspalt (21) an dem Vormonochromator (2), (e) eine Zwischenspalt-Anordnung (50) mit einem Zwischenspalt (3), (f) einen ortsauflösenden Strahlungsempfänger (5) in der Austrittsebene des Echelle-Spektrometers zur Detektion von Wellenlängen-Spektren, dadurch gekennzeichnet, daß (g) die Breite des Zwischenspalts (3) größer ist, als das durch den Vormonochromator am Ori des Zwischenspaltes entstehende monochromatische Bild des Eintrittsspaltes und (h) Mittel zur Kalibrierung des Vormonochromators vorgesehen sind, durch welche ein oder mehrere ausgewählte Punkte des Intensitätsprofils der auf den Detektor abgebildeten Strahlung der Strahlungsquelle mit kontinuierlichem Spektrum auf Referenzpositionen kalibrierbar sind.

Spektrometeranordnung, Verfahren zur Erzeugung eines zweidimensionalen Spektrums mittels einer solchen

Die Erfindung offenbart ein Spektrometeranordnung (10), umfassend: eine Eintrittsspaltgruppe (13) zum Einbringen von Strahlung in die Spektrometeranordnung (10) und zur Begrenzung des optischen Feldes der Spektrometeranordnung (10); ein erstes dispergierendes Element (31) zur spektralen Zerlegung der Strahlung in einer Hauptdispersionsrichtung; ein zweites dispergierendes Element (21) zur spektralen Zerlegung der Strahlung in einer Querdispersionsrichtung, welche einen Winkel mit der Hauptdispersionsrichtung bildet, sodass ein zweidimensionales Spektrum erzeugbar ist. Die Spektrometeranordnung (10) ist dadurch gekennzeichnet, dass die Eintrittsspaltgruppe (13) ein Spaltrad (14) umfasst, wobei das Spaltrad (14) drehbar um eine Drehachse (15) gelagert ist, wobei das Spaltrad (14) zumindest eine sichelförmige Öffnung (16) aufweist, wobei sich winkelabhängig die Breite (16.min-16.max) der Öffnung (16) ändert, wobei die Breite der Öffnung (16) in Querdispersionsrichtung verläuft, wobei die Eintrittsspaltgruppe ...

Detector apparatus for detecting coherent monochromatic point source radiation

Detector apparatus includes a dispersive prism (10) and a diffraction grating (11) of the type which produces only zero and first order diffraction patterns. Located behind the diffraction grating (11) so as to interact with the first harmonic content of the diffraction patterns is a Moire grating (12) having half the pitch of the diffraction grating (11). Detector means including at least two pairs of detectors (13-16) is located behind the Moire grating (12) to detect the presence of Moire fringes. ...

ECHELLE POLYCHROMATOR

Optical component comprising prisms and a grating

Transient Hadamard matrix spectrometer based on DMD coding

Device of spectrography

La présente invention est relative à un dispositif de spectrographie qui peut être utilisé comme monochromateur, spectrographe, spectromètre, ou colorimètre. La présente invention concerne un dispositif optique de type monochromateur ou spectrographe comportant au moins un collimateur (1) et au moins un premier disperseur (2), un deuxième disperseur (3) assurant une dispersion dont le sens est sensiblement perpendiculaire au sens de dispersion dudit premier disperseur; l'un desdits disperseurs est constitué par un réseau échelle, ledit dispositif comporte des moyens de réflexion assurant un double passage des faisceaux par lesdits premier et deuxième disperseurs et par ledit collimateur. Le domaine technique de l'invention est celui de la construction de dispositifs optiques utilisés en spectrographie en général.

Atomic emission spectrometer with background compensation

A method of and a device for multi-element measurement of elements in a sample with correction for background emission. The method starts with atomizing a sample and then exciting the transformed atoms to emit light containing characteristic spectral lines for each element, followed by generating a spectrum of spectral lines characteristic of the elements, followed by measuring the intensity of selected spectral lines falling within a predetermined measuring range without changing their intensity. The next steps are sensing the background emission adjacent the selected spectral lines simultaneously with measuring the intensity of selected spectral lines and determining the concentration of each element from the measured intensity of the corresponding spectral line and sensed background emission.

OPTISCHES ELEMENT MIT PRISMEN UND EINEM BEUGUNGSGITTER

Spektrometeranordnung

Die Erfindung bezieht sich auf eine Spektrometeranordnung, in Lichtausbreitungsrichtung nacheinander umfassend: eine Sammeloptik (3), ausgebildet zur Bündelung und Ausrichtung des einfallenden Lichtes auf einen Eintrittsspalt (4), und ein dem Eintrittsspalt (4) nachgeordnetes Abbildungssystem mit mindestens einem dispersiven Element, ausgebildet zur Abbildung eines Dispersionsspektrums des einfallenden Lichtbündels (2) auf eine ortsauflösende Detektionseinrichtung. Erfindungsgemäß ist bei einer Spektrometeranordnung dieser Art der Eintrittsspalt (4) reflektierend ausgeführt, und mindestens die Sammeloptik (3), der Eintrittsspalt (4) und ein abbildendes Gitter (5, 13) sind in einem Modul (1) zusammengefasst, wobei sie als Komponenten in einen monolithischen Grundkörper (6) integriert sind, oder als optisch wirksame Formen oder Strukturen an einem monolithischen Grundkörper (6) ausgebildet sind.

Method of analysing a spectral peak

In a spectrum of a sample generated using a detector of an optical spectrometer, an interfered peak is produced by spectral emissions of different wavelengths. For each spectral emission, interfered curve parameters representing the peak shape are generated (step 104), based on a model of expected curve parameters for the spectrometer and a location of the interfered peak on the detector. Multiple curves, each corresponding to one of the spectral emissions, are fitted to the interfered peak (106) using the interfered curve parameters, and are output (108) for further analysis. An echelle grating may diffract light onto a 2D detector, perhaps an array detector. The interfered curve parameters may comprise two asymmetric (e.g. bi-Gaussian) parameters. The model may be based on calibration sample spectra. The number of fitted curves may be determined using first or second derivatives of the interfered peak. In fitting, peak wavelength (from a database) and peak intensity may be selected for ...

PROCEDURE FOR THE WAVELENGTH CALIBRATION WITH A ECHELLESPEKTROMETER

SPECTROSCOPIC INSTRUMENT AND PROCESS FOR SPECTRAL ANALYSIS

A spectroscopic instrument (38) includes a first optical component (48) for spatial spectral splitting of a polychromatic beam of light (46) impinging onto the first optical component (48), an objective (50), which routes various spectral regions (B1, B2, B3) of the split beam of light (46a, 46b, 46c) onto differing spatial regions (52a, 52b, 52c), and a sensor (54), situated downstream of the objective (50) in the beam path of the beam of light (46a, 46b, 46c), with a plurality of light-sensitive sensor elements (54a, 54b, 54c). The sensor elements (54a, 54b, 54c) are arranged in the beam path of the split beam of light 46a, 46b, 46c in such a manner that each sensor element (54a, 54b, 54c) registers the intensity of a spectral sector (A1, A2, A3) of the beam of light (46) and the medians (Mk1, Mk2, Mk3) of the spectral sectors (A1, A2, A3) are situated equidistant from one another in the k-space, where (k) denotes the wavenumber.

Spectral feature control apparatus

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element.

Optical arrangement, multi-spot scanning microscope and method for operating a microscope

The invention relates to an optical arrangement, particularly for the detection beam path of a multi-spot scanning microscope, comprising a detection plane, in which a detector is positionable, comprising a dispersive device for spectrally splitting detection light. According to the invention, the optical arrangement is characterized in that a distorting optical unit is present for guiding the detection light into the detection plane, said distorting optical unit being arranged downstream of the dispersive device and upstream of a detection plane, and in that a rotating device is present for the relative rotation of a luminous field of the spectrally separated detection light and the distorting optical unit. The invention additionally relates to a multi-spot scanning microscope and a method for operating a microscope.

Wearable device coupled to time-of-flight imaging system

An optical system measures one or more physiological parameters with a wearable device that includes a light emitting diode (LED) source including a driver and a plurality of semiconductor sources that generate an output optical light. One or more lenses deliver a lens output light to tissue of a user. A detection system receives at least a portion of the lens output light reflected from the tissue and generates an output signal having a signal-to-noise ratio. The detection system comprises a plurality of spatially separated detectors and an analog to digital converter. The detection system increases the signal-to-noised ratio by comparing a first signal with the LEDs off to a second signal with the LEDs on. An imaging system including a Bragg reflector is pulsed and has a near infrared wavelength. A beam splitter splits the light into a sample arm and a reference arm to measure time-of-flight.

Systems and methods for high-speed, spectroscopic, gas-phase thermometry

Systems and methods for measuring temperature in an environment by creating a first beam having an energy of about 50 mJ/pulse, and a pulse duration of about 100 ps. A second beam is also created, having an energy of about 2.3 mJ/pulse, and a pulse duration of about 58 ps. The first beam and the second beam are directed into a probe region, thereby expressing an optical output. Properties of the optical output are measured at a sampling rate of at least about 100 kHz, and temperature measurements are derived from the measured properties of the optical output. Such systems and methods can be used to measure temperature in environments exhibiting highly turbulent and transient flow dynamics.

JUSTIERBARE ECHELLE-SPEKTROMETER-ANORDNUNG UND VERFAHREN ZU DESSEN JUSTAGE

Polychromatorsysteme und -verfahren

Ein Polychromatorsystem, umfassend: ein optisches Element, das eine Blende definiert; einen Kollimationsspiegel zum Empfangen von Licht über die Blende und zum Reflektieren von im Wesentlichen kollimiertem Licht; wenigstens eine erste dispersive optische Komponente und eine zweite dispersive optische Komponente, die jeweils so konfiguriert sind, dass sie das von dem Kollimationsspiegel empfangene, im Wesentlichen kollimierte Licht für verschiedene Wellenlängen in unterschiedlichem Umfang quer dispergieren und quer dispergiertes Licht mit unterschiedlichen Lichtwellenlängen, die entlang einer ersten und zweiten Achse beabstandet sind, bereitstellen; und einen Fokussierspiegel, der so positioniert ist, dass er das quer dispergierte Licht auf einen 2-D-Matrix-Detektor fokussiert, um eine Vielzahl von Blendenbildern der Blende an einer entsprechenden Vielzahl von Bereichen des Detektors bereitzustellen, wobei jedes der Vielzahl von Blendenbildern einer entsprechenden Wellenlänge des quer dispergierten ...

DETECTOR APPARATUS FOR DETECTING COHERENT MONO-CHROMATIC POINT-SOURCE RADIATION

Detector apparatus includes a dispersive prism (10) and a diffraction grating (11) of the type which produces only zero and first order diffraction patterns. Located behind the diffraction grating (11) so as to interact with the first harmonic content of the diffraction patterns is a Moire grating (12) having half the pitch of the diffraction grating (11). Detector means including at least two pairs of detectors (13 -16) is located behind the Moire grating (12) to detect the presence of Moire fringes.

SPECTROMETER FOR ANALYSIS OF THE SPECTRUM OF A LIGHT BEAM

라인 폭 측정 시스템 및 장치

... 본 발명은 라인 폭 측정 시스템을 개시하는데, 상기 라인 폭 측정 시스템은 기판 표면의 그래픽 라인 폭을 측정하는데 이용되고, 라인 폭 측정 유닛 및, 초점 표면(focal surface) 검측 및 윤곽 측정 유닛을 포함하고, 상기 초점 표면 검측 및 윤곽 측정 유닛은 제1 측정 광속(beam), 제1 탐측 모듈 및 제2 탐측 모듈을 포함하고, 상기 제1 측정 광속은 기판 표면까지 경사지게 조사(irradiate)되어, 상기 기판 표면에 의해 반사된 후, 제1 반사 광속을 형성하고, 상기 제1 반사 광속은 상기 제1 탐측 모듈로부터 수신되어, 상기 기판 표면의 디포커싱(defocusing)을 측정하고, 상기 제1 반사 광속은 상기 제2 탐측 모듈로부터 수신되어, 상기 기판 표면의 그래픽 윤곽을 측정하고, 상기 라인 폭 측정 유닛은 제2 측정 광속을 포함하고, 상기 초점 표면 검측 및 윤곽 측정 유닛과 상기 제2 탐측 모듈을 공유하고, 상기 제2 측정 광속은 상기 기판 표면까지 수직으로 입사되고, 상기 기판 표면에 의해 반사된 후, 제2 반사 광속을 형성하고, 상기 제2 반사 광속은 상기 제2 탐측 모듈로부터 수신되어, 상기 기판 표면의 그래픽 라인 폭을 측정한다.

SPECTRAL INFORMATION ACQUISITION SYSTEM, INSPECTION METHOD, AND MANUFACTURING METHOD

The spectral information acquisition system includes an illumination optical system configured to illuminate an object being moved and a spectral optical system configured to disperse light from the object illuminated by the illumination optical system. The illumination optical system includes a separation element configured to separate a light flux emitted from a light source into a first polarized light flux having a first polarization state and a second polarized light flux having a second polarization state, and a phase plate configured to change the polarization state of at least one of the first polarized light flux and the second polarized light flux. The first polarized light flux illuminates the object from a first direction, and the second polarized light flux illuminates the object from a second direction that is different from the first direction. 1. A spectral information acquisition system comprising:an illumination optical system configured to illuminate an object being moved; anda spectral optical system configured to disperse light from the object illuminated by the illumination optical system, a separation element configured to separate a light flux emitted from a light source into a first polarized light flux having a first polarization state and a second polarized light flux having a second polarization state; and', 'a phase plate configured to change the polarization state of at least one of the first polarized light flux and the second polarized light flux, and, 'wherein the illumination optical system includeswherein the first polarized light flux illuminates the object from a first direction, and the second polarized light flux illuminates the object from a second direction that is different from the first direction.2. The spectral information acquisition system according to claim 1 , wherein the phase plate is a λ/2 plate.3. The spectral information acquisition system according to claim 1 , wherein the following condition is satisfied:{'br': ...

IMPROVEMENTS IN ADJUSTABLE ECHELLE SPECTROMETER ARRANGEMENTS

Physiological measurement device using light emitting diodes

A wearable device includes a measurement device adapted to be placed on a wrist or ear having a light source with LEDs to measure physiological parameters. The measurement device generates an optical beam having a near infrared wavelength between 700-2500 nanometers by modulating the LEDs, and lenses to deliver the beam to tissue, which reflects the beam to a receiver having spectral filters in front of spatially separated detectors coupled to analog to digital converters that generate at least two receiver outputs. Signal-to-noise ratio of the beam reflected from the tissue is improved by comparing the receiver outputs, and by increasing light intensity from the LEDs. The receiver is synchronized to the modulation of the LEDs and uses a lock-in technique that detects the modulation frequency. The measurement device generates an output signal representing a non-invasive measurement on blood within the tissue.

OPTICAL COMPONENT COMPRISING PRISMS AND A GRATING

An optical component is provided herein comprising a first prism having a transmission grating on one face thereof. A second prism faces that transmission grating with one of its faces, so as to form a compact component having that transmission grating located between the first prism and the second prism.

SPECTROGRAPHIC DEVICE.

SPECTROMETER FOR ANALYSIS OF THE SPECTRUM OF A LIGHT BEAM

La présente invention propose un spectromètre (100) pour l'analyse du spectre d'un faisceau lumineux amont (1) comportant une fente d'entrée (101) et des moyens de dispersion angulaire (130). Selon l'invention, les moyens de dispersion angulaire comprennent au moins un réseau de diffraction à séparation de polarisation qui est adapté, pour la pluralité de longueurs d'onde (λ1, λ2, λ3), à diffracter un faisceau lumineux redressé (20) en des faisceaux lumineux diffractés (31, 32, 33) dans un même ordre de diffraction particulier du réseau de diffraction à séparation de polarisation qui est soit l'ordre de diffraction +1, soit l'ordre de diffraction -1, lorsque le faisceau lumineux redressé présente un état de polarisation redressé prédéterminé qui est circulaire ; et le spectromètre comporte des moyens de modification de la polarisation (1100) disposés entre la fente d'entrée et les moyens de dispersion angulaire, qui sont adaptés à modifier l'état de polarisation du faisceau lumineux amont ...

SYSTEM METHOD AND APPARATUS FOR SELECTING AND CONTROLLING LIGHT SOURCE BANDWIDTH

Compact two-dimensional spectrometer

A two-dimensional spectrometer includes a first mirror, a prism, a diffraction grating, a lens, a second mirror, and a two-dimensional sensor. The first mirror is configured to receive the optical signal from the optical entrance and reflect the optical signal towards the prism. After passing through the prism, the optical signal is provided to the diffraction grating. The diffraction grating diffracts the optical signal so as to generate a diffracted optical signal which is directed back through to prism, wherein the lens configured focuses the diffracted optical signal onto the second mirror. The second mirror reflects the diffracted optical signal back through the lens which focuses the diffracted optical signal onto the two-dimensional sensor. The diffraction grating may be an echelle grating.

Assembly and method for wavelength calibration in an echelle spectrometer

A spectrometer assembly (10) comprises a light source (11) with a continuous spectrum, a pre-monochromator (2) for generating a spectrum with a relatively small linear dispersion from which a spectral portion is selectable, the spectral bandwidth of such spectral portion being smaller than or equal to the bandwidth of the free spectral range of such order in the echelle spectrum wherein the centre wavelength of the selected spectral interval is measurable with maximum blaze efficiency, an echelle spectrometer (4) with means for wavelength calibration, an entrance slit (21) at the pre-monochromator (2), an intermediate slit assembly (50) with an intermediate slit (3) and a spatially resolving light detector (5) in the exit plane of the spectrometer for the detection of wavelength spectra. The assembly is characterised in that the width of the intermediate slit (3) is larger than the monochromatic image of the entrance slit generated by the pre-monochromator at the location of the intermediate ...

ECHELLE-POLYCHROMATOR.

An attachable spectroscope to an auxiliary CCD or CMOS camera as detector for gem identification

A gem identification device includes a spectroscope formed of a tube 1, incident window 2, slit 3, lens 4, grism 5 and exit window 6. The exit window side has a spiral groove 10 to enable the spectrometer to be attached to a hole (21, fig 4) on a fixing device, which is a shell (fig 4) or clamp (fig 3), via a screw (20, fig 4) on the border of the hole (21, fig 4). The hole is aligned with a CCD or CMOS camera which may be on a smartphone or any mobile device with a high resolution camera. Light from a gem being tested passes through the spectrometer and is collected by the camera, where the spectrum is transferred into digital data which can be stored for future reference or analysis. The fixing device may have additional holes (23, fig 4) aligned with buttons or functional keys on the camera or phone. The spectroscope may have a resolution of 0.38nm.

SPECTROMETERS WITH RETRO-REFLECTIVE SURFACES AND RELATED INSTRUMENTS

The spectrometer architecture and imager described herein refer to a compact and high-throughput spectrometer. The spectrometer comprises an aperture (101), a reflecting surface (102), a dispersive element (103), an Echelle grating (104) and a single detector (105). The spectrometer reuses optical surfaces to separate wavelengths of light. For example, the reflecting surface (102) can comprise a reflective triplet telescope acting as both, a collimator and imager. By reusing optical components, the relative size of the spectrometer may be reduced. Spectrometers according to the present disclosure may be used for optical emission spectroscopy (OES).

Assembly and method for wavelength calibration in an echelle spectrometer

WEARABLE DEVICES COMPRISING SEMICONDUCTOR DIODE LIGHT SOURCES WITH IMPROVED SIGNAL-TO-NOISE RATIO

An optical system comprises a wearable device for measuring one or more physiological parameters. The physiological parameters may change in response to stretching of the hand or movement of fingers or thumb of the user, or the parameters may be related to blood constituents or blood flow. The wearable device comprises a light source with a plurality of semiconductor diodes and a detection system that measures reflected light from tissue comprising skin. The semiconductor diodes may be light emitting diodes or laser diodes. The signal to noise ratio for the output signal may be improved by synchronizing the detection system to the light source, increasing light intensity of at least one of the plurality of semiconductor diodes from an initial light intensity, and using change detection that compares light on versus light off for the detection system output. The wearable device is also configured to identify an object.

METHOD FOR WAVELENGTH CALIBRATION IN AN ECHELLE SPECTROMETER

Optische Anordnung zur spektralen Zerlegung von Licht

Es wird eine optische Anordnung (100) zur spektralen Zerlegung von Licht mit Wellenlängen λ aus einem Spektralbereich λ1 ≤ λ ≤ λ2 beschrieben. Die optische Anordnung umfasst ein Reflexionsbeugungsgitter (4), wobei an einer Lichteinfallsseite des Reflexionsbeugungsgitters (4) ein erstes Medium (5) mit einem Brechungsindex nin angeordnet ist, und an einer der Lichteinfallseite abgewandten Seite des Reflexionsbeugungsgitters (4) ein zweites Medium (20) mit einem Brechungsindex nG angeordnet ist, wobei nin > nG ist. Die optische Anordnung ist so eingerichtet, dass Licht unter einem Einfallswinkel α aus dem ersten Medium (10) auf das Reflexionsbeugungsgitter (4) auftrifft, wobei die Bedingung sin(α) > nG/nin erfüllt ist. Das Reflexionsbeugungsgitter (4) weist ein Schichtsystem (40) mit mindestens einer unstrukturierten Schicht (42) und mindestens einer strukturierten Schicht (41) auf, wobei die mindestens eine strukturierte Schicht (41) in lateraler Richtung eine periodische Struktur mit einer ...

ATOMIC EMISSION SPECTROMETER WITH BACKGROUND COMPENSATION

DETECTOR APPARATUS FOR DETECTING COHERENT MONOCHROMATIC POINT-SOURCE RADIATION

Echelle polychromator

Spectroscopic instrument and process for spectral analysis

A spectroscopic instrument (38) includes a first optical component (48) for spatial spectral splitting of a polychromatic beam of light (46) impinging onto the first optical component (48), an objective (50), which routes various spectral regions (B ...

SPECTROMETERS WITH RETRO-REFLECTIVE SURFACES AND RELATED INSTRUMENTS

The spectrometer architecture and imager described herein refer to a compact and high-throughput spectrometer. The spectrometer comprises an aperture (101), a reflecting surface (102), a dispersive element (103), an Echelle grating (104) and a single detector (105). The spectrometer reuses optical surfaces to separate wavelengths of light. For example, the reflecting surface (102) can comprise a reflective triplet telescope acting as both, a collimator and imager. By reusing optical components, the relative size of the spectrometer may be reduced. Spectrometers according to the present disclosure may be used for optical emission spectroscopy (OES).

NEAR-INFRARED LASERS FOR NON-INVASIVE MONITORING OF GLUCOSE, KETONES, HBA1C, AND OTHER BLOOD CONSTITUENTS

Non-invasive monitoring of blood constituents such as glucose, ketones, or hemoglobin A1c may be accomplished using near-infrared or short-wave infrared (SWIR) light sources through absorbance, diffuse reflection, or transmission spectroscopy. As an example, hydro-carbon related substances such as glucose or ketones have distinct spectral features in the SWIR between approximately 1500 and 2500nm. An SWIR super-continuum laser based on laser diodes and fiber optics may be used as the light source for the non-invasive monitoring. Light may be transmitted or reflected through a tooth, since an intact tooth and its enamel and dentine may be nearly transparent in the SWIR. Blood constituents or analytes within the capillaries in the dental pulp may be detected. The non-invasive monitoring device may communicate with a device such as a smart phone or tablet, which may transmit a signal related to the measurement to the cloud with cloud-based value-added services.

OPTICAL COMPONENT COMPRISING PRISMS AND A GRATING

... 2117907 9321548 PCTABS00027 The invention concerns an optical component (1), which comprises preferably two prisms (2, 3) and an intermediate transmission grating (4). The radiation is directed by means of the prisms (2, 3) and the radiation is dispersed or collated by means of a grating (4) with big dispersion to direct the wished radiation wavelengths into wished directions.

Spectral information acquisition system, inspection method, and manufacturing method

The spectral information acquisition system includes an illumination optical system configured to illuminate an object being moved and a spectral optical system configured to disperse light from the object illuminated by the illumination optical system. The illumination optical system includes a separation element configured to separate a light flux emitted from a light source into a first polarized light flux having a first polarization state and a second polarized light flux having a second polarization state, and a phase plate configured to change the polarization state of at least one of the first polarized light flux and the second polarized light flux. The first polarized light flux illuminates the object from a first direction, and the second polarized light flux illuminates the object from a second direction that is different from the first direction.

METHOD OF CALIBRATING SPECTRUM SENSORS IN A MANUFACTURING ENVIRONMENT AND AN APPARATUS FOR EFFECTING THE SAME

Spectrum sensors can be continuously calibrated in a manufacturing environment employing a continuously moving platform that carries the spectrum sensors in combination with spatially separated light spectra illuminating a region of the platform. A plurality of spectrum sensors, each including multiple sensor pixels, can be placed on the platform. The spatially separated light spectra can be illuminated over an area of the platform. The plurality of spectrum sensors can be moved with the platform through a region of the spatially separated light spectrum. Each sensor pixel for each of the plurality of spectrum sensors can be calibrated based on response of each spectral channel during passage through the spatially separated light spectra. The entire spectra from a light source can be employed simultaneously to calibrate multiple spectrum sensors in the manufacturing environment. 1. A method of simultaneously measuring spectral responses of a plurality of optical sensors , comprising:placing a plurality of optical sensors on a platform, each of the plurality of optical sensors including a plurality of sensor pixels;providing spatially separated light spectra over an illuminated region of the platform, wherein different areas of the illuminated region are illuminated with different monochromatic lights having different peak wavelengths;moving the plurality of optical sensors with the platform through the illuminated region; andmeasuring spectral responses of at least one sensor pixel within each of the plurality of optical sensors during transit through the illuminated region.2. The method of claim 1 , whereinthe spatially separated light spectra include a continuous wavelength range segment from 250 nm to 1,100 nm.3. The method of claim 1 , further comprising intermittently stopping movement of the plurality of optical sensors during transit through the illumination region claim 1 , wherein the spectral responses of the sensor pixels is performed while the plurality ...

ATOMEMISSIONS-SPEKTROMETER MIT UNTERGRUNDKOMPENSATION

Spectroscopic instrument and process for spectral analysis

A spectroscopic instrument (38) includes a first optical component (48) for spatial spectral splitting of a polychromatic beam of light (46) impinging onto the first optical component (48), an objective (50), which routes various spectral regions (B

ATOMIC EMISSION SPECTROMETER WITH BACKGROUND COMPENSATION

Miniature grism system for astronomical spectroscopy

The invention is directed at a miniature grism system. The miniature grism system is a single compact device that comprises a grism with collimating and focusing optics. In an aspect, the grism includes at least one prism and a grating. In an aspect, the miniature grism system, and more specifically the grism, includes at least one prism which is placed on either side of the grating. The focusing optics and the collimating optics are found on opposite sides of the grism system, sandwiching the prism and grating of the grism. In an aspect, the miniature grism system is configured to be retained within a filter wheel. The miniature grism system is configured to be used with telescopes having a small focal ratio.

SEMICONDUCTOR SOURCE BASED NEAR INFRARED MEASUREMENT DEVICE WITH IMPROVED SIGNAL-TO-NOISE RATIO

A measurement system is provided with a light source that is configured to increase signal-to-noise ratio by increasing a light intensity from at least one of a plurality of semiconductor sources. An apparatus to receive a portion of the output optical beam, and deliver an analysis output beam to a sample. A receiver to: receive and process at least a portion of the analysis output beam reflected or transmitted from the sample, generate an output signal, and synchronize to the light source. A smart phone or tablet to: receive and process at least a portion of the output signal, store and display the processed output signal, and transmit at least a portion of the processed output signal. A cloud to: receive an output status comprising the at least a portion of the processed output signal, process the received output status to generate processed data, and store the processed data.

An attachable spectroscope to an auxiliary CCD or CMOS camera as detector for gem identification

Assembly and method for wavelength calibration in an echelle spectrometer

ASSEMBLY AND METHOD FOR WAVELENGTH CALIBRATION IN AN ECHELLE SPECTROMETER

ATOMIC EMISSION SPECTROMETER WITH BACKGROUND COMPENSATION

System method and apparatus for selecting and controlling light source bandwidth

System method and apparatus for selecting and controlling light source bandwidth

The bandwidth selection mechanism includes a first actuator mounted on a second face of a dispersive optical element, the second face being opposite from a reflective face, the first actuator having a first end coupled to a first end block and a second end coupled to a second end block, the first actuator being operative to apply equal and opposite forces to the first end block and the second end block to bend the body of the dispersive optical element along the longitudinal axis of the body and in a first direction normal to the reflective face of the dispersive optical element. The bandwidth selection mechanism also includes a second actuator being operative to apply equal and opposite forces to bend the body along the longitudinal axis of the body, in a second direction perpendicular to the reflective face of the dispersive optical element.

Atomic emission spectrometer with background compensation

An atomic emission spectrometer for multi-element measurement of elements (A, B, Figures 2, 3) in a sample comprises an apparatus 10 to atomise the sample and to excite the atoms for emitting characteristic spectral lines (A1 - A3, B1 - B3), a dispersion device 20, 24 which generates a spectrum of the light emitted by the atoms in a focal plane 28, and a number of first semiconductor photodetectors 32, each of which is exposed to one of the characteristic spectral lines (A1 - A3, B1 - B3). There is also a number of second semiconductor photodetectors 36 for sensing background emission outside the spectral lines (A1 - A3, B1 - B3). A processing circuit 34 determines the concentrations of the elements with correction for background emission. The processing circuit 34 comprises a signal evaluation circuit to generate a correction signal corresponding to background emission at the wavelengths of the measured spectral lines. …… ...

OPTICAL COMPONENT COMPRISING PRISMS AND A GRATING

The invention concerns an optical component (1), which comprises preferably two prisms (2, 3) and an intermediate transmission grating (4). The radiation is directed by means of the prisms (2, 3) and the radiation is dispersed or collated by means of a grating (4) with big dispersion to direct the wished radiation wavelengths into wished directions.

IMPROVEMENTS IN ADJUSTABLE ECHELLE SPECTROMETER ARRANGEMENTS

Entrance slit and dispersing prism adjustable echelle spectrometer arrangements

An adjustable Echelle spectrometer arrangement which can be used in single- and multi-element analysis by the emission or absorption of optical radiation. To compensate all the manufacturing and setup errors, the only arrangements present are those to change the height of the entry slit arrangement above the base plate and to rotate the dispersion prism about a first axis, approximately parallel to its roof edge, and about a second axis, that is vertical thereto. This compensates for the effect of errors associated with component and setup parameters which results from greater tolerances, without impairing mechanical and thermal stability and imaging quality.

OBTAINING SPECTRUM INFORMATION FROM MOVING OBJECT

An optical device includes a wavelength plate interposed between first and second polarizers, and is arranged to receive light emitted by an object which moves relative to the optical device or an image of the object. A detector array includes one or more detector elements, and is optically coupled to receive light from the second polarizer as well. Each of the detector elements of the detector array provides an electrical output signal varied by intensity of the light received by the second polarizer. The intensity of the light is a function of a relative motion of the object or the image of the object, and includes spectrum information on a position of the object as well. COPYRIGHT KIPO 2016 ...

CONFOCAL SPECTROMETER AND METHOD FOR IMAGING IN A CONFOCAL SPECTROMETER

The invention relates to a confocal spectrometer comprising a broadband light source, a first aperture device arranged rotatably in front of the light source and having a structured arrangement of a plurality of through holes, which is designed to illuminate by means of the light source the visual field of an object to be imaged, an imaging optical system that is designed to focus an image of the structured arrangement of the plurality of through holes onto the object, a dispersion element that is designed to spectrally disperse the light reflected by the object along a dispersion axis perpendicular to the optical axis of the imaging optical system, and a detector device that is designed to capture the spectrally dispersed reflected light for producing a spectrally resolved image of the object.

ASSEMBLY AND METHOD FOR WAVELENGTH CALIBRATION IN AN ECHELLE SPECTROMETER

The invention relates to a spectrometer assembly (10) containing: a radiation source (11) with a continuous spectrum; a pre-monochromator (2) for generating a spectrum with relatively little linear dispersion, from which a spectral segment can be selected, whose spectral bandwidth is less than or equal to the bandwidth of the free spectral range of the order in the echelle spectrum, for which the mean wavelength of the selected spectral segment can be measured with a maximum blaze efficiency; an echelle spectrometer (4) comprising means for wavelength calibration; an entry slit (21) on the pre-monochromator (2) and an intermediate slit assembly (3) comprising an intermediate slit and a local resolution radiation receiver (5) on the exit plane of the spectrometer for detecting wavelength spectra. The assembly is characterised in that the width of the intermediate slit (3) is greater than the monochromatic image of the entry slit generated by the pre-monochromator at the location of the intermediate ...

Spectroanalytical systems

A spectroanalytical system includes entrance aperture defining structure for receiving radiation to be analyzed along a first path; collimating structure in the first path for providing collimated radiation along a second path; fixed refraction structure in the second path for spatially separating (refracting) radiation in the second path in a first direction as a function of wavelength; fixed echelle grating structure in the second path for spatially separating the refracted radiation as a function of wavelength in a second direction orthogonal to the first direction and directing the orthogonally dispersed radiation in a beam along a third path that does not pass through the first refraction structure; and two-dimensional array detector structure for detecting the beam of orthogonally refracted radiation.

ATOMIC EMISSION SPECTROMETER WITH BACKGROUND COMPENSATION

A method of and a device for multi-element measurement of elements in a sample with correction for background emission. The method starts with atomizing a sample and then exciting the transformed atoms to emit light containing characteristic spectral lines for each element, followed by generating a spectrum of spectral lines characteristic of the elements, followed by measuring the intensity of selected spectral lines falling within a predetermined measuring range without changing their intensity. The next steps are sensing the background emission adjacent the selected spectral lines simultaneously with measuring the intensity of selected spectral lines and determining the concentration of each element from the measured intensity of the corresponding spectral line and sensed background emission.

SHORT-WAVE INFRARED SUPER-CONTINUUM LASERS FOR DETECTING COUNTERFEIT OR ILLICIT DRUGS AND PHARMACEUTICAL PROCESS CONTROL

A system and method for using near-infrared or short-wave infrared (SWIR) light sources for identification of counterfeit drugs may perform spectroscopy using a super-continuum laser to provide detection in a non-contact and non-destructive manner at stand-off or remote distances with minimal sample preparation. Also, near-infrared or SWIR light may penetrate through plastic containers and packaging, permitting on-line inspection and rapid scanning. The near-infrared or SWIR spectroscopy may also be used to detect illicit drugs and their chemical composition. Moreover, the spectroscopic techniques may also be applied to quality assessment and control in pharmaceutical manufacturing, thus permitting the implementation of smart manufacturing with feedback control. Fiber super-continuum lasers may emit light in the near-infrared or SWIR between approximately 1.4-1.8 microns, 2-2.5 microns, 1.4-2.4 microns, 1-1.8 microns. In particular embodiments, the detection system may be a dispersive spectrometer ...

Spectrometer and spectral detection and analysis method using the same

A spectrometer and a spectral detection and analysis method implemented by the spectrometer. The spectrometer includes an optical device and a detection device. The optical device includes at least one light filter, each of which including at least two light filtering units, so that the optical device can emit at least two kinds of monochromatic light. The detection device includes at least one detector, each of which comprising at least two detection units facing at least two light filtering units in the corresponding light filter in a one-to-one relationship. The monochromatic light emitted from the light filtering unit is emitted along the direction perpendicular to the direction of the light emitting surface.

Echelle spectrometer

Spectrometers include an optical assembly with optical elements arranged to receive light from a light source and direct the light along a light path to a multi-element detector, dispersing light of different wavelengths to different spatial locations on the multi-element detector. The optical assembly includes: (i) a collimator arranged in the light path to receive the light from the light source, the collimator including a mirror having a freeform surface; (2) a dispersive sub-assembly including an echelle grating, the dispersive sub-assembly being arranged in the light path to receive light from the collimator; and (3) a Schmidt telescope arranged in the light path to receive light from the dispersive sub-assembly and focus the light to a field, the multi-element detector being arranged at the field.

Spectral feature control apparatus

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element.

Assembly and method for wavelength calibration in an echelle spectrometer

ECHELLE POLYCHROMATOR

A monochromator (14) with a prism (20) is disposed so that light passes through it before passing on to an echelle polychromator (50). The linear dispersion of the monochromator (14) can be changed by changing the angular dispersion of the prism (20). This makes it possible to investigate, at high resolution, using an echelle grating (54), a particular spectral position and the region close to it. Care is taken that, depending on the mean wavelength being observed, not only is the detector array (66) of the polychromator (50) completely used, but also interfering orders are kept away from the polychromator (50). The linear dispersion of the monchromator can be changed for this purpose.

Recording photometer of high adaptability

The invention relates to a single-beam spectrophotometer, of which the central component is a novel monochromator (15), in which the measurement beam coming from an illumination optical unit (1-5) is dispersed by a fixed diffraction grating (8) and the stray light of first order (f) is directed away via the exit slit by means of a computer-controlled optical element (10) with reference to the wavelength in the millisecond range. The grating may be selectively replaced by a fixed prism with a specified beam path (secondary image, Figure 1). The vertical beam path through the cuvette (13) is characteristic. Conventional recording photometers are typically double-beam devices, which implies a slow wavelength progression in the minute range and the measurement only of clear, non-scattering samples with a typical optical density less than A2. The photometer described here no longer suffers these serious limitations. A particularly high light intensity with low stray light component is achieved ...

DETECTOR APPARATUS FOR DETECTING COHERENT MONOCHROMATIC POINT-SOURCE RADIATION

Imaging using near-infrared laser diodes with distributed bragg reflectors

A smart phone or tablet includes a first part having at least one laser diode configured to be pulsed, and a second part having at least one other laser diode, the laser diodes configured to generate near-infrared light, wherein at least some of the laser diodes comprise a distributed Bragg reflector, with some laser diode light directed to tissue including skin. An array of laser diodes generates near-infrared light and includes one or more distributed Bragg reflectors. An assembly in front of the array to forms light spots on the tissue. A first receiver includes detectors that receive light reflected from the tissue. An infrared camera generates data from light reflected from the tissue. The smart phone or tablet generates a two-dimensional or three-dimensional image or mapping using the infrared camera data, and includes a wireless receiver, a wireless transmitter, a display, a voice input module, and a speaker.

METHOD FOR PERFORMING RAMAN SPECTROSCOPY WITHIN A LOGGING WHILE DRILLING INSTRUMENT

A downhole tool has a tool body with an outer diameter equal to a borehole diameter, at least one cavity formed in and opening to an outer surface defining the outer diameter of the tool body, a light source, a filter, and a light detector mounted in the at least one cavity, and a window disposed at the opening of the at least one cavity, wherein the window encloses the cavity.

Linear axially transmissive photon-diffracting device

A linear axis spectral analysis system is enclosed. The spectral analysis system utilizes a prism-volume holographic transmission grating-prism combination to achieve a linear axis between input and detector. This design, when held with low thermal expansion materials, is extremely insensitive to temperature and vibration, allowing for enhanced accuracy without the need of temperature control. Further, the spectral analysis system provides the ability for extreme compactness.

IMAGING USING NEAR-INFRARED LASER DIODES WITH DISTRIBUTED BRAGG REFLECTORS

A smart phone or tablet includes a first part having at least one laser diode configured to be pulsed, and a second part having at least one other laser diode, the laser diodes configured to generate near-infrared light, wherein at least some of the laser diodes comprise a distributed Bragg reflector, with some laser diode light directed to tissue including skin. An array of laser diodes generates near-infrared light and includes one or more distributed Bragg reflectors. An assembly in front of the array to forms light spots on the tissue. A first receiver includes detectors that receive light reflected from the tissue. An infrared camera generates data from light reflected from the tissue. The smart phone or tablet generates a two-dimensional or three-dimensional image or mapping using the infrared camera data, and includes a wireless receiver, a wireless transmitter, a display, a voice input module, and a speaker.

JUSTIERBARE ECHELLE-SPEKTROMETER-ANORDNUNG UND VERFAHREN ZU DESSEN JUSTAGE

SYSTEM METHOD AND APPARATUS FOR SELECTING AND CONTROLLING LIGHT SOURCE BANDWIDTH

Anordnung und Verfahren zur Wellenlängenkalibration bei einem Echelle-Spektrometer

Eine Spektrometer-Anordnung (10) enthält eine Strahlungsquelle (11) mit kontinuierlichem Spektrum, einen Vormonochromator (2) zur Erzeugung eines Spektrums mit relativ geringer Lineardispersion, aus welchem ein Spektrenausschnitt selektierbar ist, dessen spektrale Bandbreite kleiner oder gleich der Bandbreite des freien Spektralbereiches derjenigen Ordnung im Echelle-Spektrum ist, in der die Mittenwellenlänge des selektierten Spektrenausschnitts mit maximaler Blazeefektivität messbar ist, ein Echelle-Spektrometer (4) mit Mitteln zur Wellenlängenkalibrierung, einen Eintrittsspalt (21) an dem Vormonochromator (2), eine Zwischenspalt-Anordnung (3) mit einem Zwischenspalt und einen ortauslösenden Strahlungsempfänger (5) in der Austrittsebene des Spektrometers zur Detektion von Wellenlängen-Spektren. Die Anordnung ist dadurch gekennzeichnet, daß die Breite des Zwischenspalts (3) größer ist, als das durch den Vormonochromator am Ort des Zwischenspaltes entstehende monochromatische Bild des Eintrittsspaltes ...

Two-beam grating polychromator - has refractive prism for shifting spectrum from diffracting grating, and single octave edge filter in front of two-octave detector array

Light (12) is diffracted by a grating (14) and fed to a detector array (34) as a spectrum. The detector detects the light over one octave with the light extending in the direction of separation from a short wave end to a long wave end. A refracting prism (20) causes an offset of the spectrum in the separation direction. Short wave light is offset more strongly than long wave light. An edge filter (36) is located in front of the detector array in the longer wavelength region and at a distance from the detector element exposed to the lower end of the detected spectrum. The filter only passes light above a certain wavelength corresp. to double the wavelength of the lower end of the spectrum detected by the array. USE/ADVANTAGE - For detection of spectrum of specimen. over one octave. Effects of higher orders, esp. second order, of grid are eliminated.

ECHELLE-DOPPELMONOCHROMATOR

A monochromator (14) with a prism (20) is disposed so that light passes through it before passing on to an echelle polychromator (50). The linear dispersion of the monochromator (14) can be changed by changing the angular dispersion of the prism (20). This makes it possible to investigate, at high resolution, using an echelle grating (54), a particular spectral position and the region close to it. Care is taken that, depending on the mean wavelength being observed, not only is the detector array (66) of the polychromator (50) completely used, but also interfering orders are kept away from the polychromator (50). The linear dispersion of the monchromator can be changed for this purpose.

SPATIAL HETERODYNE SPECTROMETER

A conventional spatial heterodyne spectrometer (SHS) comprises a beam splitter and a pair of diffraction gratings, one in each arm of the SHS. The beam splitter separates an input beam of light into first and second sub-beams for transmission to a respective diffraction grating, and then recombines the diffracted sub-beams for focusing onto a camera. A field widened SHS enables much larger range of input angles of the original beam to be focused onto the camera, so that a broader range of wavelengths may be collected. Increasing the range of wavelengths may be provided by one or more of the following: combining the beam splitter with a field widening prism, making one diffraction grating farther from the beam splitter than the other, and placing a plurality of diffraction gratings in each arm of the SHS. 1. A spatial heterodyne spectrometer (SHS) comprising:an input for launching an input beam of light;a beam splitter for separating the input beam of light into first and second sub-beams, and directing the first and second sub-beams along first and second paths, respectively;a first field-widening prism in the first path for deflecting the first sub-beam;a second field-widening prism in the second path for deflecting the second sub-beam;a first diffraction grating in the first path for diffracting the first sub-beam into constituent wavelengths, each travelling back to the beam splitter at a different angle;a second diffraction grating in the second path for diffracting the second sub-beam into the constituent wavelengths, each travelling back to the beam splitter at a different angle;a camera for recording a fringe pattern created by interference of the first and second diffracted sub-beams; anda controller for determining a spectrum of the input beam from the fringe pattern;wherein the first and second diffraction gratings include a same Littrow wavelength providing a heterodyne wavelength creating a zero-path element within the fringe pattern;wherein a first ...

SPECTRAL FEATURE CONTROL APPARATUS

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element. 1. A spectral feature selection apparatus comprising:a dispersive optical element;a beam expander including a plurality of prisms arranged in a path between the dispersive optical element and an aperture; andat least one actuation system comprising a rapid actuator including a rotatable shaft to which a prism in the beam expander is fixed; the dispersive optical element and the beam expander are arranged such that a light beam interacts with the aperture, the beam expander, and the dispersive optical element along an optical path that lies in an XY plane of the apparatus;', 'the rotatable shaft is configured to rotate about a shaft axis that is perpendicular to the XY plane and thereby causing the prism to rotate about a prism axis that is parallel with the shaft axis; and', 'the rapid actuator lacks mechanical memory and lacks an energy ground state., 'wherein2. The spectral feature selection apparatus of claim 1 , further comprising a control system connected to the actuation system claim 1 , and configured to send a signal to the actuation system instructing the rapid actuator to rotate the ...

ANGLE LIMITING REFLECTOR AND OPTICAL DISPERSIVE DEVICE INCLUDING THE SAME

The invention relates to angle-limiting optical reflectors and optical dispersive devices such as optical spectrum analyzers using the same. The reflector has two reflective surfaces arranged in a two-dimensional corner reflector configuration for reflecting incident light back with a shift, and includes two prisms having a gap therebetween that is tilted to reflect unwanted light and transmit wanted light. A two-pass optical spectrum analyzer utilizes the reflector to block unwanted multi-pass modes that may otherwise exist and degrade the wavelength selectivity of the device. 1. An optical dispersive device , comprising:an optical grating to receive an input light beam along an input direction and to output at least a portion of the input light beam as an output light beam in an output direction; anda reflector optically coupled with the optical grating, wherein light in the input light beam of a first wavelength diffracted from the optical grating at a first diffraction angle is reflected by the reflector back towards the optical grating and is diffracted in an output direction to form the output light beam; first and second prisms of an optically transmissive material positioned with a gap therebetween in an optical path of the light diffracted from the optical grating,', 'wherein at least the first prism is wedged-shaped and comprises a light output surface slanted with respect to a light input surface at a first vertex angle', 'wherein the second prism comprises a light input surface opposite the light output surface of the first prism and not parallel to the light output surface of the first prism, and', 'wherein the gap is formed between the light output surface of the first prism and the light input surface of the second prism., 'wherein the reflector comprises2. The optical dispersive device of claim 1 , wherein the light output surface of the first prism is slanted at a second angle with respect to a dispersion plane of the optical grating claim 1 , and ...

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.

COMPACT SPECTROMETERS AND INSTRUMENTS INCLUDING THEM

A spectrometer with an unobstructed, Schmidt reflector is described. The spectrometer may include a Schmidt corrector and a dispersive element as separate components. Alternatively, the Schmidt corrector and dispersive element may be combined into a single optical component. The spectrometer may further include a field-flattener lens. 1. An optical spectrometer comprising:an aperture;a collimator;an Echelle grating;an off-axis Schmidt telescope; anda detector,wherein the collimator is optically coupled to the aperture and the Echelle grating,wherein the off-axis Schmidt telescope is optically coupled to the Echelle grating, and the detector,wherein light entering the spectrometer through the aperture is directed to the detector, andwherein light incident on the detector comprises a plurality of wavelengths that are spatially separated across the ultraviolet light spectrum and the visible light spectrum.2. The optical spectrometer according to claim 1 , wherein the off-axis Schmidt telescope further comprises:a Schmidt corrector;a dispersive element; anda mirror.3. The optical spectrometer according to claim 2 ,wherein the mirror comprises a spherical mirror.4. The optical spectrometer according to claim 2 , further comprising:a field flattening lens positioned between the mirror,wherein the detector and the field flattening lens are optically coupled to the mirror.5. The optical spectrometer according to claim 2 ,wherein the dispersive element comprises a prism, andwherein the Schmidt corrector is an aspheric surface on one face of the prism.6. The optical spectrometer according to claim 2 ,wherein the dispersive element comprises a prism, andwherein the Schmidt corrector is separate and independent of the prism.7. The optical spectrometer according to claim 6 , wherein the Schmidt corrector is a reflective mirror.8. The optical spectrometer according to claim 1 ,wherein the detector is configured to detect visible light.9. The optical spectrometer according to ...

SPECTROMETER

The invention relates to a spectrometer comprising a combination of at least one grid () and at least one prism (), characterised in that total reflexion is used to produce a compact spectrometer in at least one prism (). 111-. (canceled)12122. A spectrometer comprising a combination of at least one grating () and at least one prism () , wherein total reflection is used in at least one prism () in order to achieve a compact spectrometer.1311. The spectrometer according to claim 12 , wherein a reflection grating () is used as the at least one grating ().14132. The spectrometer according to claim 12 , wherein a splitting of the incident and reflected rays of the grating () becomes possible on the side () of the prism () characterized by total reflection.152. The spectrometer according to claim 13 , wherein the angle between the reflection grating and the prism () is used for further optimizing the spectrometer characteristics.16. The spectrometer according to claim 15 , wherein the spectrometer characteristics are linear in the circular wave number.17. The spectrometer according to claim 15 , wherein the spectrometer compensates the dispersion-induced non-linear relationship between wavelength and focal point of a confocal chromatic measurement system such that the overall characteristics become linear in the object distance.18. The spectrometer according to claim 15 , wherein the spectrometer characteristics are linear in the wavelength.19212. The spectrometer as in claim 12 , wherein the prism () and the grating () are positioned relative to one another in such a way that a light beam passes through the prism () twice.201. The spectrometer as in claim 12 , wherein the grating () is positioned or oriented in such a way that it can be operated in the Littrow mode.21. The spectrometer as in claim 12 , wherein a lens array used for focusing light beams onto a detector is included for adjusting the k-linearities.22. The spectrometer as in claim 12 , wherein a folding of ...

INTEGRATED MINIATURE POLARIMETER AND SPECTROGRAPH USING STATIC OPTICS

Embodiments provide an integrated miniature polarimeter and spectrograph (IMPS) and associated methods for using an IMPS to determine Stokes parameters to describe a source beam. In one embodiment an IMPs is provided comprising a spectropolarimeter module. The spectropolarimeter module comprises a miniature optical bench; a slit component; a birefringent wedge; a dichroic prism; a spectral disperser; and a focal plane array. The slit component, birefringent wedge, dichroic prism, spectral disperser, and focal plane array are mounted to the miniature optical bench such that a beam incident on the slit component will be incident on (1) the birefringent wedge, (2) the dichroic prism, (3) the spectral disperser, and (4) the focal plane array, in that order. 1. An integrated miniature polarimeter and spectrograph (IMPS) comprising: a miniature optical bench;', 'a slit component;', 'a birefringent wedge;', 'a dichroic prism;', 'a spectral disperser; and', 'a focal plane array,', 'the slit component, birefringent wedge, dichroic prism, spectral disperser, and focal plane array are mounted to the miniature optical bench such that a beam incident on the slit component will be incident on (1) the birefringent wedge, (2) the dichroic prism, (3) the spectral disperser, and (4) the focal plane array, in that order.', 'wherein], 'a spectropolarimeter module comprising2. The IMPS of claim 1 , wherein the dichroic prism is a Wollaston prism.3. The IMPS of claim 1 , wherein the spectropolarimeter module further comprises a powered mirror configured to focus the beam onto the focal plane array.4. The IMPS of claim 3 , wherein the spectral disperser is one of (a) a grating imprinted directly onto the powered mirror claim 3 , (b) a grating imprinted onto a flat transmissive or reflective surface positioned just prior to the powered mirror along a light path of the IMPS claim 3 , (c) one or more spectral prisms positioned just prior to the powered mirror along the light path of the IMPS ...

Sagnac Fourier Spectrometer (SAFOS)

A technique and device to determine the spectrum of electromagnetic radiation in a certain range of wavelengths comprising: splitting said radiation into more than one beam; let these beams counter-propagate in a Sagnac-type ring interferometer; and imprinting a wavelength-dependent angular tilt onto the wavefront of each beam by at least one dispersive element which preferably is a transmission grating or grism; and re-combining the multiple beams on a detector that exhibits spatial resolution and can therefore resolve the fringes formed by interference; and perform the mathematical operations to determine the spectrum of said radiation from the obtained interferogram, wherein the dispersive element is mounted on a stage providing linear and/or rotational movement.

Monolithic Assembly of Reflective Spatial Heterodyne Spectrometer

Novel monolithic cyclical reflective spatial heterodyne spectrometers (CRSHS) are presented. Monolithic CRSHS in accordance with the invention have a single frame wherein a flat mirror, roof mirror, and symmetric grating are affixed. The invention contains only fixed parts; the flat mirror, roof mirror, and symmetric grating do not move in relation to the frame. Compared to conventional CRSHS known in the art, the present invention enables much smaller and lighter CRSHS, requires less time and skill for maintenance, and is a better economic option. The disclosed invention may include fixed field-widening optical elements or a fiber-fed assembly.

Compact two-dimensional spectrometer

A two-dimensional spectrometer includes a first mirror, a prism, a diffraction grating, a lens, a second mirror, and a two-dimensional sensor. The first mirror is configured to receive the optical signal from the optical entrance and reflect the optical signal towards the prism. After passing through the prism, the optical signal is provided to the diffraction grating. The diffraction grating diffracts the optical signal so as to generate a diffracted optical signal which is directed back through to prism, wherein the lens configured focuses the diffracted optical signal onto the second mirror. The second mirror reflects the diffracted optical signal back through the lens which focuses the diffracted optical signal onto the two-dimensional sensor. The diffraction grating may be an echelle grating.

NEAR-INFRARED LASERS FOR NON-INVASIVE MONITORING OF GLUCOSE, KETONES, HBA1C, AND OTHER BLOOD CONSTITUENTS

An imaging device includes laser diodes (LDs) generating near-infrared wavelength light, lenses configured to deliver the light to tissue, a first receiver having one or more detectors, and a first part with at least one of the LDs capable of being pulsed. The first receiver receives light reflected from the tissue and is synchronized to the pulsed light and configured to perform a time-of-flight measurement. An infrared camera receives light reflected by the tissue from a second part of the imaging device. The camera captures light while the second part is off, and while the second part is on to generate corresponding signals, and differences the signals to generate an image. An array of LDs generates a grid of spots on the tissue, which is reflected to the camera. A coupled phone, tablet, or computer receives and processes the time-of-flight measurement, the image, and the reflected grid of spots. 1. An imaging device , comprising:a plurality of laser diodes (LDs) configured to generate light having one or more optical wavelengths, wherein at least a portion of the one or more optical wavelengths is a near-infrared wavelength between 700 nanometers and 2500 nanometers;one or more lenses configured to receive and to deliver a portion of the light to tissue, wherein the tissue is capable of reflecting at least a portion of the light delivered to the tissue;an array of LDs configured to generate light formed as a grid of spots, the light having one or more optical wavelengths, wherein at least a portion of the one or more optical wavelengths is a near-infrared wavelength between 700 nanometers and 2500 nanometers;one or more lenses configured to receive and to deliver a portion of the light from the array of LDs to tissue, wherein the tissue is capable of reflecting at least a portion of the light delivered to the tissue;a first receiver comprising one or more detectors;a first part of the imaging device comprising at least one of the plurality of LDs, the at least ...

A MULTI-ORDER DIFFRACTIVE FRESNEL LENS (MOD-DFL) AND SYSTEMS THAT INCORPORATE THE MOD-DFL

A multi-order diffractive Fresnel lens (MOD-DFL) that is suitable for use in a space telescope for studying transiting earth-like planets of distant stars is provided. The MOD-DFL may comprise a MOD-DFL array comprising a plurality of MOD-DFL segments that are secured to a mounting surface of a deployment device, such as a balloon, for example, in a preselected arrangement to form the MOD-DFL. An array telescope may be formed of an array of deployment devices, such as an array of balloons, for example, each having a MOD-DFL secured to a mounting surface of the respective deployment device, an optics system disposed inside of the respective deployment device, and a camera disposed inside of the respective deployment device. Each MOD-DFL comprises a plurality of MOD-DFL segments arranged in a preselected arrangement to form the respective MOD-DFL. 1. A multi-order diffractive Fresnel lens (MOD-DFL) comprising:an optical substrate having a bottom surface and a top surface; anda surface profile formed in the top surface, the surface profile being radially symmetric relative to a center axis of the MOD DFL, the surface profile comprising N transitions in the top surface at N radial positions, respectively, from the center axis, where N is a positive integer that is greater than or equal to 2, each of the transitions occurring at a respective zone boundary and having a step height in a direction parallel to the center axis.2. The MOD-DFL of claim 1 , wherein the surface profile is a continuous curve from the center axis to a closest of the N transitions to the center axis.3. The MOD-DFL of claim 2 , wherein the continuous curve is aspherical in shape.4. The MOD-DFL of claim 1 , wherein the MOD-DFL is an Morder MOD-DFL claim 1 , where M is a positive integer that is greater than or equal to 250.5. The MOD-DFL of claim 1 , wherein the step height is the same for all of the transitions and is greater than or equal to 0.25 millimeters (mm).6. The MOD-DFL of claim 1 , wherein ...

SPECTROPHOTOMETER CALIBRATION METHODS AND SYSTEMS

A method of calibrating a spectrophotometer comprising a flash lamp. The method comprises receiving light from the flash lamp at a monochromator of the spectrometer, wherein the flash lamp is a short arc noble gas flash lamp with transverse or axially aligned electrodes; configuring the monochromator to progressively transmit the received light at each of a plurality wavelengths N of a selected range of wavelengths, wherein the range of wavelengths is associated with a wavelength feature according to a known spectral profile of the flash lamp, and wherein the wavelength feature is a self-absorption feature; and determining a spectrum of the flash lamp, wherein the spectrum comprises a corresponding power or intensity value for each of the plurality of wavelengths. The method further comprises determining a wavelength calibration error value for the wavelength feature by comparing the spectrum with a segment of a predetermined reference spectrum associated with the flash lamp, wherein the segment of the predetermined reference 1. A method of calibrating a spectrophotometer comprising a flash lamp , the method comprising:receiving light from the flash lamp at a monochromator of the spectrometer, wherein the flash lamp is a short arc noble gas flash lamp with transverse or axially aligned electrodes;configuring the monochromator to progressively transmit the received light at each of a plurality wavelengths of a selected range of wavelengths, wherein the range of wavelengths is associated with a wavelength feature according to a known spectral profile of the flash lamp, and wherein the wavelength feature is a self-absorption feature;determining a spectrum of the flash lamp, wherein the spectrum comprises a corresponding power or intensity value for each of the plurality of wavelengths;determining a wavelength calibration error value for the wavelength feature by comparing the spectrum with a segment of a predetermined reference spectrum associated with the flash lamp, ...

Monolithic spectrometer arrangement

The invention relates to a spectrometer arrangement comprising successively in the light propagation direction:—a converging optical unit ( 3 ), designed for focusing and orienting the incident light onto an entrance slit ( 4 ), and—an imaging system disposed downstream of the entrance slit ( 4 ) and having at least one dispersive element, designed for imaging a dispersion spectrum of the incident light beam ( 2 ) onto a spatially resolving detection device. According to the invention, in a spectrometer arrangement of this type—the entrance slit ( 4 ) is embodied in a reflective fashion, and—at least the converging optical unit ( 3 ), the entrance slit ( 4 ) and an imaging grating ( 5, 13 ) are combined in a module ( 1 ), wherein they—are integrated as components in a monolithic main body ( 6 ), or—are embodied as optically active forms or structures on a monolithic main body ( 6 ).

High resolution multi-pass optical spectrum analyzer

A system for a high resolution optical spectrum analyzer (OSA) using an efficient multi-pass configuration is disclosed. The system may include an entrance slit to allow inward passage of an optical beam. The system may also include a grating element to diffract the optical beam. The system may further include a retroreflective element to retroreflect the optical beam. The system may also include a mirror to reflect the optical beam. The system may include an exit slit, which in some examples may be adjacent to the entrance slit. The exit slit may allow outward passage of the optical beam for a high resolution optical measurement.

LINEAR FREQUENCY DOMAIN GRATING AND MULTIBAND SPECTROMETER HAVING SAME

A linear frequency domain grating and a multiband spectrometer having the same. The linear frequency domain grating includes a dispersive optical element and a diffractive optical element being substantially in contact with the dispersive optical element or being substantially integrated with the dispersive optical element, configured to receive a beam of incident light along an incident optical path, and diffract and disperse it into its constituent spectrum of frequencies of the light that is output from the dispersive optical element along an output optical path, such that the output light has a spatial distribution on a focal plane in the output optical path that is a linear function of the frequency. The linear frequency domain grating is a transmissive-type grating or a reflective-type grating, depending on whether the incident optical path and the output optical path are in different sides or the same side of the diffractive optical element. 1. A linear frequency domain grating , comprising:a dispersive optical element and a diffractive optical element being substantially in contact with the dispersive optical element or being substantially integrated with the dispersive optical element, configured to receive a beam of incident light along an incident optical path, and diffract and disperse it into its constituent spectrum of frequencies of the light that is output from the dispersive optical element along an output optical path, such that the output light has a spatial distribution on a focal plane in the output optical path that is a linear function of the frequency,wherein the dispersive optical element is formed of an optically transparent material.2. The linear frequency domain grating of claim 1 , wherein the diffractive optical element is characterized with grooves per unit μ claim 1 , wherein the dispersive optical element is characterized with a refractive index n(λ) a geometry and a size; and wherein the grooves per unit μ it of the diffractive ...

LIGHT-BASED SPECTROSCOPY WITH IMPROVED SIGNAL-TO-NOISE RATIO

A measurement system includes a light source having semiconductor sources, a multiplexer, and one or more fused silica fibers configured to form an output optical beam having one or more optical wavelengths modulated at a modulation frequency. A light beam set-up includes a monochromator forming a filtered optical beam. A measurement apparatus delivers the filtered optical beam to a sample. A receiver receives a spectroscopy output beam generated from the sample by the filtered optical beam. The receiver is configured to use a lock-in technique that detects the modulation frequency, and to generate first and second signals responsive to light received while the light source is off and on, respectively. The measurement system improves a signal-to-noise ratio of the spectroscopy output beam by differencing the first and second signals. The receiver processes the spectroscopy output beam using chemometrics or multivariate analysis to permit identification of materials within the sample. 1. A measurement system comprising: a plurality of semiconductor sources configured to generate an input optical beam;', 'a multiplexer configured to receive at least a portion of the input optical beam and to form an intermediate optical beam;', 'one or more fibers configured to receive at least a portion of the intermediate optical beam and to form the output optical beam;', 'wherein at least a portion of the one or more fibers comprises a fused silica fiber;', 'wherein the output optical beam comprises one or more optical wavelengths; and', 'wherein the output optical beam is modulated at a modulation frequency;, 'a light source configured to generate an output optical beam, comprisinga light beam set-up comprising a monochromator configured to receive at least a portion of the output optical beam and to form a filtered optical beam;a measurement apparatus configured to receive a received portion of the filtered optical beam and to deliver a delivered portion of the filtered optical ...

PHYSIOLOGICAL MEASUREMENT DEVICE USING LEDS

A wearable device includes a measurement device adapted to be placed on a wrist or ear having a light source with LEDs to measure physiological parameters. The measurement device generates an optical beam having a near infrared wavelength between 700-2500 nanometers by modulating the LEDs, and lenses to deliver the beam to tissue, which reflects the beam to a receiver having spectral filters in front of spatially separated detectors coupled to analog to digital converters that generate at least two receiver outputs. Signal-to-noise ratio of the beam reflected from the tissue is improved by comparing the receiver outputs, and by increasing light intensity from the LEDs. The receiver is synchronized to the modulation of the LEDs and uses a lock-in technique that detects the modulation frequency. The measurement device generates an output signal representing a non-invasive measurement on blood within the tissue. 1. A wearable device , comprising:a measurement device including a light source comprising a plurality of light emitting diodes (LEDs) for measuring one or more physiological parameters, the measurement device configured to generate, by modulating at least one of the LEDs having an initial light intensity, an optical beam having a plurality of optical wavelengths, wherein at least a portion of the plurality of optical wavelengths is a near-infrared wavelength between 700 nanometers and 2500 nanometers;the measurement device comprising one or more lenses configured to receive and to deliver a portion of the optical beam to tissue, wherein the tissue reflects at least a portion of the optical beam delivered to the tissue, and wherein the measurement device is adapted to be placed on a wrist or an ear of a user;the measurement device further comprising a receiver, the receiver having a plurality of spatially separated detectors and one or more analog to digital converters coupled to the spatially separated detectors, the one or more analog to digital converters ...

Short-wave infrared super-continuum laers for natural gas leak detection, exploration, and other active remote sensing applications

A system and method for using near-infrared or short-wave infrared (SWIR) light sources between approximately 1.4-1.8 microns, 2-2.5 microns, 1.4-2.4 microns, 1-1.8 microns for active remote sensing or hyper-spectral imaging for detection of natural gas leaks or exploration sense the presence of hydro-carbon gases such as methane and ethane. Most hydro-carbons (gases, liquids and solids) exhibit spectral features in the SWIR, which may also coincide with atmospheric transmission windows (e.g., approximately 1.4-1.8 microns or 2-2.5 microns). Active remote sensing or hyper-spectral imaging systems may include a fiber-based super-continuum laser and a detection system and may reside on an aircraft, vehicle, handheld, or stationary platform. Super-continuum sources may emit light in the near-infrared or SWIR. An imaging spectrometer or a gas-filter correlation radiometer may be used to identify substances or materials such as oil spills, geology and mineralogy, vegetation, greenhouse gases, construction materials, plastics, explosives, fertilizers, paints, or drugs.

attachable spectroscope to an auxiliary CCD or CMOS camera as detector for gem identification

The present invention includes a spectroscope for gem identification and a fixing device to connect the spectroscope and an auxiliary image sensor. The functional compartments of the spectroscope concerning the present invention include a tube, an incident window, a slit, lens, a newly designed grism, and an exit window; there are two different kind of fixing device designed to fulfill its purpose, one is a clamp, the other is a shell.

NEAR-INFRARED LASER DIODES USED IN IMAGING APPLICATIONS

A smart phone or tablet includes pulsed laser diodes generating light with near-infrared wavelengths between 700-2500 nanometers. First lenses direct light from the laser diodes to tissue. An array of pulsed laser diodes generates light with near-infrared wavelengths between 700-2500 nanometers. Second lenses form light from the array into spots directed on the tissue. An infrared camera synchronized to the laser diodes and the array generates data based on light reflected from the tissue. The smart phone or tablet generates a two-dimensional or three-dimensional image using the data from the infrared camera. The smart phone or tablet includes a wireless receiver, a wireless transmitter, a display, a voice input module, and a speaker. 1. A smart phone or tablet , comprising:one or more laser diodes configured to be pulsed and to generate light having one or more optical wavelengths, wherein at least a portion of the one or more optical wavelengths is a near-infrared wavelength between 700 nanometers and 2500 nanometers;a first one or more lenses configured to receive a portion of the light from the one or more laser diodes and to direct at least some portion of the received light to tissue;an array of laser diodes configured to be pulsed and to generate light having one or more optical wavelengths, wherein at least a portion of the one or more optical wavelengths is a near-infrared wavelength between 700 nanometers and 2500 nanometers;a second one or more lenses configured to receive a portion of the light from the array of laser diodes, the array of laser diodes and the second one or more lenses configured to form the light into a plurality of spots and to direct at least some of the spots to tissue; the infrared camera further configured to be synchronized to the array of laser diodes to receive light from at least a portion of the plurality of spots reflected from the tissue, and wherein the infrared camera generates additional data based at least in part on the ...

Semiconductor diodes-based physiological measurement device with improved signal-to-noise ratio

A wearable device includes a measurement device to measure a physiological parameter adapted to be placed on a wrist or an ear of a user. A plurality of semiconductor light sources such as light emitting diodes generate corresponding output light having an initial light intensity. A receiver includes spatially separated detectors receiving reflected light from the output lights and coupled to analog to digital converters. The receiver is configured to synchronize to the semiconductor source(s). The measurement device improves signal-to-noise ratio of the output signal by increasing light intensity relative to the initial light intensity and by increasing a pulse rate. Further improvement in signal-to-noise ratio is achieved by using change detection, where the receiver compares the signals with light on and with light off.

Optical Arrangement, Multi-Spot Scanning Microscope and Methold for Operating a Microscope

The invention relates to an optical arrangement, particularly for the detection beam path of a multi-spot scanning microscope, comprising a detection plane, in which a detector is positionable, comprising a dispersive device for spectrally splitting detection light. According to the invention, the optical arrangement is characterized in that a distorting optical unit is present for guiding the detection light into the detection plane, said distorting optical unit being arranged downstream of the dispersive device and upstream of a detection plane, and in that a rotating device is present for the relative rotation of a luminous field of the spectrally separated detection light and the distorting optical unit. The invention additionally relates to a multi-spot scanning microscope and a method for operating a microscope.

Light splitting device and method for manufacturing the same, method for dispersing light, and spectrometer

A light splitting device includes an optical waveguide body and a dispersion grating. The optical waveguide body is configured to transmit incident light to the dispersion grating, the dispersion grating is configured to disperse the incident light transmitted by the optical waveguide body into a plurality of spectral lines, and the optical waveguide body is further configured to change propagation directions of the plurality of spectral lines and to emit the plurality of spectral lines.

METHOD FOR PERFORMING RAMAN SPECTROSCOPY WITHIN A LOGGING WHILE DRILLING INSTRUMENT

A downhole tool has a tool body with an outer diameter equal to a borehole diameter, at least one cavity formed in and opening to an outer surface defining the outer diameter of the tool body, a light source, a filter, and a light detector mounted in the at least one cavity, and a window disposed at the opening of the at least one cavity, wherein the window encloses the cavity. 1. A downhole tool , comprising:a tool body having an outer diameter equal to a borehole diameter;at least one cavity formed in and opening to an outer surface defining the outer diameter of the tool body;a light source mounted in the at least one cavity;a filter mounted in the at least one cavity;a light detector mounted in the at least one cavity; anda window disposed at the opening of the at least one cavity, wherein the window encloses the cavity.2. The tool of claim 1 , wherein the at least one cavity comprises a cooling device enclosed therein.3. The tool of claim 1 , wherein the light source is mounted in a first enclosed cavity and the monochromator and the light detector are mounted in a second enclosed cavity.4. The tool of claim 1 , wherein the light source claim 1 , the monochromator and the light detector are mounted in a single enclosed cavity.5. The tool of claim 1 , wherein the light source is a solid-state laser.6. The tool of claim 1 , wherein the filter is a prism or diffraction grating.7. The tool of claim 1 , wherein the light detector is a charge coupled device.8. The tool of claim 1 , wherein the tool body comprises a plurality of blades extending radially outward from a longitudinal axis to the outer diameter claim 1 , the at least one cavity formed in at least one of the plurality of blades.9. The tool of claim 1 , wherein the tool is a Logging While Drilling instrument for use in oil and gas wells.10. The tool of claim 1 , wherein the tool is part of a bottom hole assembly.11. A method claim 1 , comprising:taking a Raman spectroscopy measurement of a formation from ...

SPECTRAL FEATURE CONTROL APPARATUS

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element. 1. A spectral feature selection apparatus for an optical source that produces a light beam , the apparatus comprising:a dispersive optical element arranged to interact with a pulsed light beam; the pulsed light beam travels along a beam path and has a transverse extent that crosses the hypotenuse of each right-angled prism so that the transverse extent of the pulsed light beam is contained within each of the hypotenuses of each right-angled prism,', 'the right-angled prism that is closest to the dispersive optical element has a hypotenuse having the largest length of the set,', 'each consecutive right-angled prism farther from the dispersive optical element has a hypotenuse having a length that is smaller than or equal to the hypotenuse of the adjacent right-angled prism that is closer to the dispersive optical element, and', 'the right-angled prism that is closest to the dispersive optical element is arranged with its right angle positioned away from the dispersive optical element., 'a plurality of right-angled prisms through which the pulsed light beam is transmitted so that the pulsed light ...

Spectroscopic instrument and process for spectral analysis

Spectroscopic instrument and process for spectral analysis

一种光谱仪器(38)包括：第一光学部件(48)，所述第一光学部件(48)用于对入射到所述第一光学部件(48)上的多色光束(46)进行空间光谱分离；物镜(50)，所述物镜(50)将多种不同光谱区(B 1 ，B 2 ，B 3 )的分离光束(46a，46b，46c)发送到不同的空间区域(52a，52b，52c)上；以及传感器(54)，所述传感器(54)在所述分离光束(46a，46b，46c)的光路中位于所述物镜(50)的下游，所述传感器(54)具有多个光敏传感器元件(54a，54b，54c)。所述传感器元件(54a，54b，54c)以下述的方式被布置在所述分离光束46a、46b、46c的光路中，即，使得每个所述传感器元件(54a，54b，54c)记录所述光束(46)的光谱扇区(A 1 ，A 2 ，A 3 )的强度，并且所述光谱扇区(A 1 ，A 2 ，A 3 )的中值(Mk 1 ，Mk 2 ，Mk 3 )彼此等距地位于k空间中，其中(k)表示波数。

Asymmetric spatial heterodyne spectrometer based on improved Koster prism

本发明公开了一种基于改进型 棱镜的非对称空间外差光谱仪，包括：改进型 棱镜、视场扩展棱镜、闪耀光栅、成像透镜、探测器。其中，所述改进型 棱镜由一个直角棱镜和一个直角梯形棱镜胶合而成，胶合面作为分光面。入射的准直信号光被改进型 棱镜的分光面分成两束后，以不同的光程垂直于改进型 棱镜的下底面出射，两出射光束分别经视场扩展棱镜折射和光栅衍射后再次进入改进型 棱镜，并在其出射面形成干涉，由成像透镜将干涉条纹成像在探测器上。本发明所述的一种基于改进型 棱镜的非对称空间外差光谱仪在保证准共路结构设计的同时，可以有效增加两干涉光路的光程差偏置量，提高仪器的多普勒测速灵敏度。

Integrated micro spectrometer optical system based on free-form surface prism

本发明涉及一种基于自由曲面棱镜的一体式微型光谱仪光学系统，包括入射狭缝(1)、自由曲面棱镜(2)和像面(3)，所述的自由曲面棱镜(2)包括入瞳平面(201)、准直区域(202)、聚焦区域(204)和出射面(205)，所述的准直区域(202)和聚焦区域(204)上设有反射镜，所述的自由曲面棱镜(2)上还设有平面衍射光栅(203)，入射光线由入射狭缝(1)出射，经入瞳平面(201)入射后经准直区域(202)反射至平面衍射光栅(203)，衍射分光后的光线经聚焦区域(204)反射并经出射面(205)出射，聚焦在像面(3)成像。与现有技术相比，本发明具有高性能、构型紧凑和低成本等优点。

Hyperspectral sensor

본 발명은 입사광을 파장 별로 각도를 변환하도록 구성된 파장 별 각도 변환부, 입사 각도와 파장에 따라 상기 입사광을 선택적으로 회절시키도록 구성된 회절부, 적어도 하나의 렌즈를 포함하며, 상기 회절부를 통과한 회절광을 집속시키도록 구성된 포커싱 광학계, 및 상기 포커싱 광학계를 통과하여 초점 면에 형성된 이미지를 획득하도록 구성되는 이미지 센서를 포함하되, 상기 회절부는 내부에 주기적인 굴절률 분포를 갖는 볼륨 브래그 격자를 포함하는 초분광 센서를 제공한다. The present invention includes an angle conversion unit for each wavelength configured to convert an angle of incident light for each wavelength, a diffraction unit configured to selectively diffract the incident light according to an incident angle and wavelength, and at least one lens, wherein the diffraction unit passes through the diffraction unit A second comprising: a focusing optics configured to focus light; and an image sensor configured to pass through the focusing optics and obtain an image formed at a focal plane, wherein the diffraction portion includes a volume Bragg grating having a periodic refractive index distribution therein A spectral sensor is provided.

Transient Hadamard matrix spectrometer based on DMD coding

本发明公开了一种基于DMD编码的瞬态哈达玛矩阵光谱仪，包括匀光片、望远物镜、棱镜、DMD、准直透镜、闪耀光栅、聚焦透镜和CCD相机，入射光经由所述匀光片匀光后经由所述望远物镜聚焦在所述DMD上进行编码；编码后的光线经过所述棱镜反射再经过所述准直透镜准直，经过所述准直透镜之后的平行光线入射到所述闪耀光栅；色散后的叠加光谱经过所述聚焦透镜聚焦后由所述CCD相机采集，记录整个哈达玛循环矩阵的所有色散叠加后的光谱矩阵测量值。本发明的基于DMD编码的瞬态哈达玛矩阵光谱仪有更好的信噪比和响应速度，可以采集面阵光谱，采用可更换光栅设计有更好的适应性。

Spectral feature control apparatus

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element.

Spectral feature controller

【課題】スペクトルフィーチャを制御する装置を提供する。【解決手段】スペクトルフィーチャ選択装置は、パルス光ビームと相互作用するように配置された分散光学素子と、分散光学素子とパルス光源との間のパルス光ビームの経路に配置された３つ以上の屈折光学素子と、１つ又は複数の作動システムであって、各作動システムが、屈折光学素子と関連付けられ、かつ、関連付けられた屈折光学素子を回転させることによってパルス光ビームのスペクトルフィーチャを調節するように構成された、１つ又は複数の作動システムと、を含む。作動システムの少なくとも１つは、回転軸の周りで関連付けられた屈折光学素子を回転させるように構成された高速アクチュエータを含む高速作動システムである。高速アクチュエータは、関連付けられた屈折光学素子の回転軸と平行なシャフト軸の周りを回転する回転シャフトを有する回転ステッパモータを含む。【選択図】図３Ａ

Monolithic assembly of reflective spatial heterodyne spectroscope

Beam Spectrometer

본 발명은 분광분석기에 관한 것으로서, 여러 파장 성분이 혼합된 광을 측정대상물에 조사하기 위한 광원과, 상기 광원으로부터 방출된 광을 스펙트럼 분산시키며, 상기 분산된 광을 출구 슬릿을 통하여 한번에 방출시키는 광 분산부와, 상기 광 분산부로부터 방출된 상기 분산된 광을 측정용 광 및 기준용 광으로 분할하며, 이들 중 상기 측정용 광만이 상기 측정대상물에 조사되도록 배치된 제1 광 분할기와, 상기 측정대상물을 투과한 상기 측정용 광과 상기 기준용 광을 동일한 경로로 유도하는 제2 광 분할기 및 상기 제2 광 분할기를 거친 상기 측정용 광 및 상기 기준용 광을 수광하여 각 광의 파장에 따른 세기를 측정하는 광 검출기를 포함하고, 상기 광 분산부는 상기 광 분산부 내에 고정 배치된 그레이팅부를 구비하며, 상기 그레이팅부는 입구 슬릿을 통하여 입사된 광을 파장에 따라 서로 다른 경로로 상기 출구 슬릿으로 반사시키는 것을 특징으로 하는 분광분석기를 제공한다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectroscopic analyzer, comprising: a light source for irradiating a measurement object with light mixed with various wavelength components; and a light that spectrally disperses the light emitted from the light source and emits the scattered light through the exit slit at once. A first light splitter arranged to split the scattered light emitted from the light scattering part into a measurement light and a reference light, wherein only the measurement light is irradiated to the measurement object, and the measurement The measurement light and the reference light passing through the object and the reference light for guiding the measurement light and the reference light in the same path are received and the intensity according to the wavelength of each light is received. A light detector for measuring, said light scattering portion having a grating portion fixedly disposed within said light scattering portion, said grating portion having an inlet slot Provided is a spectrometer characterized in that the light incident through the light reflects to the exit slit in a different path depending on the wavelength. 본 발명에 따르면, 종래에 비하여 측정 속도가 현저히 향상되며, 측정 오차가 최소화된 분광분석기를 얻을 수 있다. According to the present invention, it is possible to obtain a spectrometer with a significantly improved measurement speed and a minimum measurement error compared to the conventional art. 분광분석기, 스펙트럼, spectrometer, 그레이팅 Spectrometer, ...

Monolithic spectrometer arrangement

本发明涉及光谱仪装置，在光传播方向中相接地包括：汇聚光学元件(3)，构造成用于捆扎并且定向进入的光到射入缝隙(4)上，以及<b/>具有至少一个色散元件的在射入缝隙(4)之后布置的投影系统，构造成用于投影进入的光束(2)的色散光谱到位置分解的检测设备上。根据本发明在这种光谱仪装置的情况下射入缝隙(4)实施成反射的，并且至少汇聚光学元件(3)，射入缝隙(4)和投影的光栅(5，13)综合在模块(1)中，其中它们作为组件集成在整体的基体(6)中，或作为光学起作用的形状或结构在整体的基体(6)上构造。

Spectrophotometer calibration methods and systems

A method of calibrating a spectrophotometer comprising a flash lamp. The method comprises receiving light from the flash lamp at a monochromator of the spectrometer, wherein the flash lamp is a short arc noble gas flash lamp with transverse or axially aligned electrodes; configuring the monochromator to progressively transmit the received light at each of a plurality wavelengths of a selected range of wavelengths, wherein the range of wavelengths is associated with a wavelength feature according to a known spectral profile of the flash lamp, and wherein the wavelength feature is a self-absorption feature; and determining a spectrum of the flash lamp, wherein the spectrum comprises a corresponding power or intensity value for each of the plurality of wavelengths. The method further comprises determining a wavelength calibration error value for the wavelength feature by comparing the spectrum with a segment of a predetermined reference spectrum associated with the flash lamp, wherein the segment of the predetermined reference spectrum includes one or more wavelengths associated with the self-absorption feature; and calibrating the spectrophotometer based on the wavelength calibration error value.

Light comb generating device and spectrometers comprising the same

개시된 일 실시 예에 따른 광 빗살 발생 장치는, 기준 파장 대역의 광을 생성하고 생성된 광을 출력하기 위한 광원, 및 출력된 광으로부터 기준 빗살 간격을 갖는 광 빗살을 발생시키기 위한 광 빗살 발생기를 포함하고, 광원은, 출력되는 광의 파장을 기준 시간 구간마다 기준 주파수 간격만큼 변화시키고, 광 빗살은 기준 주파수 간격의 파장 범위에서 발생되고, 기준 파장 대역은 3μm 보다 크거나 같고 30μm 보다 작거나 같을 수 있다. An optical comb generating apparatus according to an embodiment of the disclosure includes a light source for generating light of a reference wavelength band and outputting the generated light, and an optical comb generator for generating an optical comb having a reference comb spacing from the output light and the light source changes the wavelength of the output light by the reference frequency interval for each reference time interval, the optical comb is generated in the wavelength range of the reference frequency interval, and the reference wavelength band is greater than or equal to 3 μm and less than or equal to 30 μm. .

Spectral feature control apparatus

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element.

Short-wave infrared super-continuum lasers for early detection of dental caries

A wearable device for use with a smart phone or tablet includes LEDs for measuring physiological parameters by modulating the LEDs and generating a near-infrared multi-wavelength optical beam. At least one LED emits at a first wavelength having a first penetration depth and at least another LED emits at a second wavelength having a second penetration depth into tissue. The device includes lenses that deliver the optical beam to the tissue, which reflects the first and second wavelengths. A receiver is configured to capture light while the LEDs are off and while at least one of the LEDs is on and to difference corresponding signals to improve a signal-to-noise ratio of the optical beam reflected from the tissue. The signal-to-noise ratio is further increased by increasing light intensity of at least one of the LEDs. The device generates an output signal representing a non-invasive measurement on blood within the tissue.

Spectrometer system and spectral analysis method

本发明实施例公开了一种光谱仪系统和光谱检测分析方法。光谱仪系统包括：采光装置和探测装置，采光装置包括分光结构和滤光结构，采光装置与探测装置之间设置有测试通道；分光结构用于将入射光分光为单色光后出射，照射到滤光结构上；滤光结构用于过滤单色光中的杂散光后出射目标波长范围的单色光，将出射的单色光通过测试通道中的待测物后，照射到探测装置上；探测装置用于接收目标波长范围的单色光与待测物发生反应后的光学信号，该光学信号为用于对待测物进行光谱分析的光学信号。本发明实施例解决了采用传统光谱仪进行分光时存在光谱叠级串色的现象而影响光谱仪检测效果的问题，以及传统光谱仪中存在的偏向角问题。

Compact two-dimensional spectrometer

A two-dimensional spectrometer includes a first mirror, a prism, a diffraction grating, a lens, a second mirror, and a two-dimensional sensor. The first mirror is configured to receive the optical signal from the optical entrance and reflect the optical signal towards the prism. After passing through the prism, the optical signal is provided to the diffraction grating. The diffraction grating diffracts the optical signal so as to generate a diffracted optical signal which is directed back through to prism, wherein the lens configured focusses the diffracted optical signal onto the second mirror. The second mirror reflects the diffracted optical signal back through the lens which focusses the diffracted optical signal onto the two-dimensional sensor. The diffraction grating may be an echelle grating.

Two-Dimensional Spectral Imaging System

Systems, including methods, apparatus, and algorithms, for spectrally imaging a two-dimensional array of samples.

Spectral imaging system

A spectral imaging system includes a spectrometer and an optics imaging system. The spectrometer is operable for generating spectral signatures of objects from a scene. The optics imaging system is operable to generate six or more responses from the same scene. Each of the six or more responses represents different spectral content of the objects in the scene. The responses generated by the optics imaging system can be used to generate a hypercube using spectral reconstruction techniques. In an embodiment, the spectral imaging system could be implemented as part of a mobile phone.

Spectrometer arrangement, method for producing a two-dimensional spectrum by means of such a spectrometer arrangement

The present disclosure discloses a spectrometer arrangement including an entrance-slit group including a slit wheel and a slit mask for introducing radiation into and for limiting the optical field of the spectrometer arrangement, a first dispersive element for spectrally decomposing the radiation in a main dispersion direction, and a second dispersive element for spectrally decomposing the radiation in a transverse dispersion direction that forms an angle with the main dispersion direction to yield a two-dimensional spectrum. The slit wheel is mounted rotatably about an axis of rotation and has a falcate opening having a width that changes depending on the angle. The slit mask includes an opening that is longer than a largest width of the falcate opening such that radiation radiates through the falcate opening of the slit wheel and the opening of the slit mask. The present disclosure further includes a corresponding method and an optical component group.

Hyperspectral camera

카메라는 반사 슬릿 어셈블리 상에 입사광을 포커싱하도록 구성된 제1 렌즈를 포함한다. 반사 슬릿 어셈블리는 복귀광으로서 입사광의 전부가 아닌 일부를 반사하도록 구성된 반사 재료의 연장 스트립을 포함한다. 제1 렌즈는 반사 재료의 연장 스트립으로부터의 복귀광을 적어도 부분적으로 콜리메이트하도록 구성된다. 제1 거울은 제1 렌즈로부터의 복귀광을 반사하도록 구성된다. 제2 거울은 제1 거울로부터의 복귀광을 반사하도록 구성된다. 광학 소자는 파장의 함수로서 제1 거울로부터의 복귀광을 분리하도록 구성된다. 제2 렌즈는 광학 소자로부터의 복귀광을 제1 검출기 상에 포커싱하도록 구성된다. 제1 검출기는 제1 검출기 상의 2차원 위치의 함수로서 복귀광의 강도를 측정하도록 구성된다.

Short-wave infrared super-continuum lasers for detecting counterfeit or illicit drugs and pharmaceutical process control

A measurement system includes a wearable measurement device for measuring one or more physiological parameters, including a light source comprising a plurality of light emitting diodes (LEDs) configured to generate an output optical beam with a near-infrared wavelength between 700 nanometers and 2500 nanometers. The light source is configured to increase signal-to-noise ratio by increasing a light intensity and pulse rate of the LEDs. The system includes a plurality of lenses configured to receive the output optical beam and to deliver an analysis output beam to a sample. The wearable measurement device includes a receiver configured to process the analysis output beam reflected or transmitted from the sample and to generate an output signal that may be transmitted to a remote device configured to process the received output status to generate processed data and to store the processed data.

Confocal spectrometer and method of imaging in a confocal spectrometer

Die Erfindung betrifft ein konfokales Spektrometer, mit einer breitbandigen Lichtquelle, einer vor der Lichtquelle angeordneten drehbaren ersten Blendenvorrichtung mit einer strukturierten Anordnung einer Vielzahl von Durchgangslöchern, welche dazu ausgelegt ist, das Gesichtsfeld eines abzubildenden Objekts durch die Lichtquelle zu beleuchten, einer Abbildungsoptik, welche dazu ausgelegt ist, ein Abbild der strukturierten Anordnung der Vielzahl von Durchgangslöchern auf das Objekt zu fokussieren, einem Dispersionselement, welches dazu ausgelegt ist, das von dem Objekt reflektierte Licht entlang einer Dispersionsachse senkrecht zu der optischen Achse der Abbildungsoptik spektral zu dispergieren, und einer Detektoreinrichtung, welche dazu ausgelegt ist, das spektral dispergierte reflektierte Licht zum Erzeugen eines spektral aufgelösten Bildes des Objekts zu erfassen. The invention relates to a confocal spectrometer, comprising a broadband light source, a rotatable first diaphragm device arranged in front of the light source, with a structured arrangement of a plurality of through holes, which is designed to illuminate the field of view of an object to be imaged by the light source, an imaging optics, which is adapted to focus an image of the structured arrangement of the plurality of through holes on the object, a dispersion element which is designed to spectrally disperse the light reflected from the object along a dispersion axis perpendicular to the optical axis of the imaging optics, and a detector device, which is adapted to detect the spectrally dispersed reflected light to produce a spectrally resolved image of the object.

System configured for measuring physiological parameters

A wearable device for measuring physiological parameters includes a light source having a plurality of semiconductor light emitting diodes (LEDs) each configured to generate an output optical beam, wherein at least a portion of the one or more optical beam wavelengths is a near-infrared wavelength. The light source is configured to increase signal-to-noise ratio by increasing light intensity for at least one of the LEDs and by increasing a pulse rate of at least one of the LEDs. A lens is configured to receive the output optical beam and to deliver a lens output beam to tissue. A detection system generates an output signal in response to the lens output beam reflected from the tissue, wherein the detection system is configured to be synchronized to the light source, and is located a different distance from a first one of the LEDs than a second one of the LEDs.

Absolute linear-in-k spectrometer

A detector system for Fourier spectroscopy such as a spectral domain optical coherence tomography instrument includes a diffractive optic for diffracting the interfering light into angularly dispersed wavenumbers, a prism for reduces a nonlinear angular dispersion among the wavenumbers, and a focusing optic for converting the angularly dispersed wavenumbers from the prism into spatially distributed wavenumbers along a detector having an array of pixels. A field lens between the focusing optic and the detector has a freeform surface for more evenly distributing the wavenumbers along the array of pixels.

Spectral feature controller

Time-of-flight measurement of skin or blood using array of laser diodes with Bragg reflectors

A blood measurement system comprises an array of laser diodes, to generate light to penetrate tissue comprising skin, having one or more wavelengths, including a near-infrared wavelength, and Bragg reflector(s). At least one of the laser diodes to pulse at a pulse repetition rate between 1-100 megahertz. A detection system to measure blood in veins based at least in part on near-infrared diffuse reflection from the skin, the detection system comprising a photo-detector and a lens system coupled to the photo-detector, wherein the photo-detector is coupled to analog-to-digital converter(s) and a processor, and configured to measure absorption of hemoglobin in the near-infrared wavelength between 700-1300 nanometers, differentiate between regions in the skin with and without distinct veins, and implement pattern matching and a threshold function to correlate detected blood concentrations with a library of known concentrations to determine overlap.

Spectral feature control apparatus

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element.

Spectrometer

Obtaining spectral information from a moving object

본 광학 장치는 제1 및 제2 편광자들 간에 개재되는 파장판을 포함하며 또한 광학 장치에 상대하여 이동 중인 물체 또는 물체 이미지로부터 방사하는 광을 수용하도록 배치된다. 검출기 어레이는 하나 이상의 검출기 요소들을 포함하며 또한 제2 편광자로부터 광을 수용하도록 광학적으로 결합된다. 검출기 어레이의 검출기 요소 각각은 제2 편광자로부터 수용되는 광의 강도에 따라 변화하는 전기 출력 신호를 제공한다. 광의 강도는 물체 또는 물체 이미지와 광학 장치의 상대 이동의 함수이며 또한 물체의 물체 지점에 관한 스펙트럼 정보를 포함한다.

Spectroscopic analysis device

本发明具有：光源，其将包含多个波长成分的光射出；偏振片，其将从光源射出的光变换为向样品照射的直线偏振光的光；偏振衍射元件，其使经过了样品的光所包含的第1偏振成分向第1方向衍射而进行波长分散，使第2偏振成分向与所述第1方向不同的第2方向衍射而进行波长分散；棱镜，其配置于偏振衍射元件的出射侧，具有与第1方向相交叉的第1出射面和与第2方向相交叉的第2出射面，第1出射面及第2出射面相对于包含第1方向及第2方向在内的基准面的角度彼此不同；拍摄元件，其对从棱镜的第1出射面射出的第1偏振成分的像和从第2出射面射出的第2偏振成分的像进行拍摄；以及处理装置，其基于拍摄元件的拍摄结果对样品进行分析。

Apparatus to perform intrinsic hyper-spectral flow cytometry

The Intrinsic Hyper-Spectral Flow Cytometer (IHSFC) and its associated methodology, improves current flow cytometry by eliminating the need of associated hardware-based elements currently used for spectral data detection. The (IHSFC), rather than using narrow band lasers to excite or interrogate the analytes, the flow stream is excited by a wide wavelength range beam. The raw data generated by the (IHSFC) are as follows; forward light scatter, right angle light scatter, coherent spectral data and non-coherent spectral data. The intrinsic fluorescent spectral components are extracted from the coherent and non-coherent spectral data.

Echelle polychromator

An Echelle polychromator 50 has disposed upstream thereof a pre-monochromator 14 comprising a prism 20. The linear dispersion of the pre-monochromator 14 is variable by varying the angular dispersion of the prism 20. A particular spectral position and the close vicinity thereof are analyzed by an Echelle grating 54 with high resolution. Care must be taken that, on the one hand, the detector array 66 of the Echelle polychromator 50 is fully exploited in response to the central wavelength respectively observed and that, on the other hand, interfering orders are kept away from the Echelle polychromator 50. The linear dispersion of the pre-monochromator is variable for this purpose.

Inspection apparatus, PTP packaging machine, and PTP sheet manufacturing method

Spectrometer with light reflecting surface and related apparatus

本文所述的光谱仪架构和成像仪是指紧凑且高通量的光谱仪。所述光谱仪包括孔口(101)、反射表面(102)、色散元件(103)、中阶梯光栅(104)和单个检测器(105)。所述光谱仪重新使用光学表面以分离光的波长。例如，所述反射表面(102)可包括同时充当准直仪和成像仪的反射三重态望远镜。通过重新使用光学组件，可减小所述光谱仪的相对尺寸。根据本公开的光谱仪可用于光发射光谱法(OES)。

Systems and methods for high-speed, spectroscopic, gas-phase thermometry

Systems and methods for measuring temperature in an environment by creating a first beam having an energy of about 50 mJ/pulse, and a pulse duration of about 100 ps. A second beam is also created, having an energy of about 2.3 mJ/pulse, and a pulse duration of about 58 ps. The first beam and the second beam are directed into a probe region, thereby expressing an optical output. Properties of the optical output are measured at a sampling rate of at least about 100 kHz, and temperature measurements are derived from the measured properties of the optical output. Such systems and methods can be used to measure temperature in environments exhibiting highly turbulent and transient flow dynamics.

Testing device, ptp packaging machine, and method for manufacturing ptp sheets

Provided are: a testing device that can improve testing precision for testing of contamination with products of a different type using spectroscopic analysis; a PTP (press-though pack) packaging machine; and a method for manufacturing a PTP sheet. A testing device 22 is provided with: an illumination device 52 that can radiate near-infrared light onto tablets 5 which are filled into pocket sections 2 of a conveyed container film 3; an imaging device 53 that can disperse reflected near-infrared light reflected from the tablets 5 and capture a spectroscopic image of the reflected light; and a control processing device that acquires spectrum data on the basis of the spectroscopic image captured by the imaging device 53 and that performs prescribed analysis processing on the basis of the spectrum data. The testing device tests for contamination with products of a different type.

Spectrometers and related instruments with retroreflective surfaces

hyperspectral camera

【課題】 プッシュ・ブルームハイパースペクトル撮像のための小型光学系を提供する。【解決手段】 カメラは、入射光を反射スリットアセンブリの上に集束させるように構成された第１レンズを含む。反射スリットアセンブリは、入射光の全てではなく一部を戻り光として反射するように構成された反射材料の細長ストリップを備える。第１レンズは、反射材料の細長ストリップからの戻り光を少なくとも部分的に平行化するように構成される。第１ミラーは、第１レンズからの戻り光を反射するように構成される。第２ミラーは、第１ミラーからの戻り光を反射するように構成される。光学要素は、第１ミラーからの戻り光を波長の関数として分離するように構成される。第２レンズは、光学要素からの戻り光を第１検出器の上に集束させるように構成される。第１検出器は、戻り光の強度を第１検出器上の２次元位置の関数として測定するように構成される。【選択図】 図１０

Liquid fuel property detection system

A liquid fuel property detection apparatus includes a fuel passage, a light emitting device for emitting a light including a plurality of predetermined wavelengths toward the fuel in the passage, a light receiving device for receiving the light passing through the fuel, and a calculation unit for calculating the concentration of at least one of aroma, paraffin and olefin, which are hydrocarbon component components contained in the fuel. The calculation unit calculates the concentration of a specific component, which is one of aroma, paraffin and olefin, based on the reference transmittance of light in the specific component and the actual transmittance calculated from the amount of light emitted by the light emitting device and the amount of light received by the light receiving device with respect to each wavelength of the light.

Spectrometer and spectrum detection analysis method using same

A spectrometer (10) and a spectrum detection analysis method executed using the spectrometer (10). The spectrometer (10) comprises an optical device (100) and a detection device (200), wherein the optical device (100) comprises at least one filter (130), each filter (130) comprises at least two filter units (130a, 130b, 130c), so that the optical device (100) can emit at least two kinds of monochromatic light. The detection device (200) comprises at least one detector (220), and each detector (220) comprises at least two detection units (220a, 220b, 220c), at least two detection units (220a, 220b, 220c) and at least two filter units (130a, 130b, 130c) in a corresponding filter (130) face each other one to one. The monochromatic light emitted from the filter units (130a, 130b, 130c) exits in a direction perpendicular to a light exiting surface (110b).

Semiconductor diodes-based physiological measurement device with improved signal-to-noise ratio

A wearable device includes a measurement device to measure a physiological parameter adapted to be placed on a wrist or an ear of a user. A plurality of semiconductor light sources such as light emitting diodes generate corresponding output light having an initial light intensity. A receiver includes spatially separated detectors receiving reflected light from the output lights and coupled to analog to digital converters. The receiver is configured to synchronize to the semiconductor source(s). The measurement device improves signal-to-noise ratio of the output signal by increasing light intensity relative to the initial light intensity and by increasing a pulse rate. Further improvement in signal-to-noise ratio is achieved by using change detection, where the receiver compares the signals with light on and with light off.

エシェル分光器

分光器は、光源から光を受け取り、光を光路に沿ってマルチエレメント検出器に向けるように配置された複数の光学素子を備える光学アセンブリであって、互いに異なる波長の光をマルチエレメント検出器上の互いに異なる空間位置に分散させる光学アセンブリを備える。光学アセンブリは、（ｉ）光源からの光を受け取るように光路に配置されたコリメータであって、自由曲面を有するミラーを備えるコリメータと、（２）エシェル格子を備える分散サブアセンブリであって、コリメータからの光を受け取るように光路に配置される分散サブアセンブリと、（３）分散サブアセンブリから光を受け取り、光を視野に集束させるように光路に配置されたシュミットテレスコープであって、マルチエレメント検出器が視野に配置されているシュミットテレスコープと、を含む。

Optical system for efficiently dispersing a beam based on diffraction and total internal reflection in a grating prism

An optical system (100) and a corresponding method for efficiently wavelength dispersing an incoming beam (201) with a grism (101), and spatially separating the dispersed beam from the incoming beam (201) by total internal reflection in the grism (101). The grism (101) comprises a first prism surface (102), a second prism surface (103) with a grating (105), and a third prism surface (104), and is arranged in the optical system (100) to receive the incoming beam (201) with the first prism surface (102). The second prism surface (103) is configured to receive the incoming beam (201) from the first prism surface (102), and to diffract the incoming beam (201) to form a diffracted beam (202). The first prism surface (102) is configured to receive the diffracted beam (202) from the second prism surface (103) and to reflect the diffracted beam (202) by total internal reflection towards and/or out of the third prism surface (104).

一种静态傅里叶光谱装置

本发明实施例公开一种静态傅里叶光谱装置，包括前置光学结构，所述前置光学结构包括三角平面镜、位于所述三角平面镜上方的第一球面镜、以及狭缝；双直角分束器，所述双直角分束器包括第一梯形棱镜和第二梯形棱镜，所述第一梯形棱镜的下底面和第二梯形棱镜的下底面错开预定距离相粘合而构成分束面；后置光学结构，所述后置光学结构包括第二球面镜和柱面反射镜。本发明实施例基于双直角分束器，除分束器全部采用反射式结构，有效地折叠光路，从而减小整个系统的体积、有效地扩宽光谱范围。

基于彩虹光片的快照式三维成像方法及系统

本发明公开基于彩虹光片的快照式三维成像方法及系统，采用光谱范围较宽的灯作为照明光源，采用光栅单色仪结构产生波长连续变化的光片为照射的彩虹光片，在彩虹光片侧向照明下，色差中继光路将三维的空间图像转化为高光谱图像，继而由压缩成像光谱仪将三维的高光谱信息压缩在二维的光电探测器上。最后，通过压缩感知重建算法，仅需一次曝光即可重构出物体的三维空间信息。通过将光片照明技术与压缩成像技术相结合，该方法有效解决了现有三维光学成像技术速度慢、深度分辨率差、空间‑带宽积低等问题，将在动态显微成像领域得到广泛应用。

Short-wave infrared sensor for identifying based on water content

An optical system operating in the near or short-wave infrared wavelength range identifies an object based on water absorption. The system comprises a light source with modulated light emitting diodes operating at wavelengths near 1090 and 1440 nanometers, corresponding to lower and higher water absorption. The system further comprises one or more wavelength selective filters and a housing that is further coupled to an electrical circuit and a processor. The detection system comprises photodetectors that are synchronized to the light source, and the detection system receives at least a portion of light reflected from the object. The system is configured to identify the object by comparing the reflected light at the first and second wavelength to generate an output value, and then comparing the output value to a threshold. The optical system may be further coupled to a wearable device or a remote sensing system with a time-of-flight sensor.

Echelle Spectrometer

Spectrometers include an optical assembly with optical elements arranged to receive light from a light source and direct the light along a light path to a multi-element detector, dispersing light of different wavelengths to different spatial locations on the multi-element detector. The optical assembly includes: (i) a collimator arranged in the light path to receive the light from the light source, the collimator including a mirror having a freeform surface; (2) a dispersive sub-assembly including an echelle grating, the dispersive sub-assembly being arranged in the light path to receive light from the collimator; and (3) a Schmidt telescope arranged in the light path to receive light from the dispersive sub-assembly and focus the light to a field, the multi-element detector being arranged at the field.

Kompaktes optisches Spektrometer

Ein optisches Spektrometer weist eine Anordnung aus wenigstens einem Transmissionsgitter und wenigstens einem Prisma oder Prisma-ähnlichen Körper sowie einen optischen Detektor mit einer oder mehreren Zeilen von Detektorelementen auf. Das Transmissionsgitter und das Prisma oder der Prisma-ähnliche Körper sind dabei so ausgebildet und relativ zum Detektor angeordnet, dass ein aus einer Einfallsrichtung auf die Anordnung auftreffender optischer Strahl beim Durchgang durch die Anordnung in spektrale Komponenten zerlegt und in dem Prisma oder Prisma-ähnlichen Körper an mindestens einer Fläche des Prismas oder Prisma-ähnlichen Körpers reflektiert wird, und in einer Austrittsrichtung aus der Anordnung auf den Detektor auftrifft. Das optische Spektrometer lässt sich ohne weitere Umlenkspiegel in sehr kompakter Bauweise realisieren.

Ellipsometer and inspection device for inspecting semiconductor device having the same

An ellipsometer is provided. The ellipsometer includes: a polarizing optical element, comprising a prism, that is configured to split reflected light into two linearly polarized components of light having polarization directions orthogonal to each other, the reflected light generated by reflecting illuminated light, including linearly polarized light that is polarized in one direction, from a measurement surface of a sample; an interference member, comprising at least one body, that is configured to form at least one interference fringe in which the two linearly polarized components of light interfere with each other in directions different from the polarization directions; an image detector configured to detect the at least one interference fringe; and an analysis device including at least one processor, the analysis device configured to calculate ellipsometry coefficients Ψ and Δ based on the at least one interference fringe that is detected.

Time-of-flight imaging and physiological measurements

A measurement system is provided with an array of laser diodes with one or more Bragg reflectors. At least a portion of the light generated by the array is configured to penetrate tissue comprising skin. A detection system configured to: measure a phase shift, and a time-of-flight, of at least a portion of the light from the array of laser diodes reflected from the tissue relative to the portion of the light generated by the array; generate one or more images of the tissue; detect oxy- or deoxy-hemoglobin in the tissue; non-invasively measure blood in blood vessels within or below a dermis layer within the skin; measure one or more physiological parameters based at least in part on the non-invasively measured blood; and measure a variation in the blood or physiological parameter over a period of time.

System for non-invasive measurement using cameras and time of flight detection

A measurement system comprises a pulsed laser diode array that includes one or more Bragg reflectors, and wherein the light generated by the array penetrates tissue comprising skin. At least some of the wavelengths of light are in the near infrared. The detection system is synchronized to the laser diode array and comprises an infrared camera and a first receiver comprising a plurality of detectors. The first receiver comprises one or more detector arrays and performs a time-of-flight measurement. The measurement system generates an image, the detection system non-invasively measures blood in blood vessels within or below a dermis layer within the skin based at least in part on near-infrared diffuse reflection from the skin, and the detection system measures absorption of hemoglobin between 700 and 1300 nanometers wavelength range. A processor compares the absorption of hemoglobin between different tissue spatial locations, and the measurement system processes the time-of-flight measurement.

Time-of-flight imaging and physiological measurements

A measurement system is provided with an array of laser diodes with one or more Bragg reflectors. At least a portion of the light generated by the array is configured to penetrate tissue comprising skin. A detection system configured to: measure a phase shift, and a time-of-flight, of at least a portion of the light from the array of laser diodes reflected from the tissue relative to the portion of the light generated by the array; generate one or more images of the tissue; detect oxy- or deoxy-hemoglobin in the tissue; non-invasively measure blood in blood vessels within or below a dermis layer within the skin; measure one or more physiological parameters based at least in part on the non-invasively measured blood; and measure a variation in the blood or physiological parameter over a period of time.

Active remote sensing system using time-of-flight sensor with applications to cameras and vehicle or airborne platforms

An active remote sensing system is provided with an array of laser diodes that generate light directed to an object having one or more optical wavelengths that include at least one near-infrared wavelength between 600 nanometers and 1000 nanometers. One of the laser diodes pulses at a modulation frequency between 10 Megahertz and 1 Gigahertz and has a phase associated with the modulation frequency. A detection system includes a photo-detector, a lens, a spectral filter at an input to the photo-detector, and a processor that processes digitized signals received from the photo-detector to generate an output signal. The detection system uses a lock-in technique that synchronizes pulsing the one laser diode. The active remote sensing system is configured to be mounted on a vehicle or an airborne platform to provide distance information based on a time-of-flight measurement.

Identifying objects using near-infrared sensors, cameras or time-of-flight detectors

A sensing system includes laser diodes with Bragg reflectors generating light having an initial light intensity and one or more near-infrared optical wavelengths. The laser diodes are modulated with a pulsed output with 0.5 to 2 nanosecond pulse duration. A beam splitter receives light from the laser diodes, splits the light into a received sample arm light directed to an object and a received reference arm light. A detection system includes a second lens and spectral filters in front of a photodiode array. The photodiode array is coupled to CMOS transistors and receives at least a portion of the received reference arm light and generates a reference detector signal. The detection system is synchronized with the laser diodes. A time-of-flight measurement is based on a comparison of the sample detector signal and the reference detector signal and measures a temporal distribution of photons in the received reflected sample arm light.