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 ...

Spectrometer with Monochromator and Order Sorting Filter

A spectrometer () comprises a light source (), a monochromator () with at least one diffraction grating (), a monochromator housing (), an order sorting filter (), a microplate receptacle () and a controller (). The order sorting filter () of the spectrometer () comprises a substrate (), a first optical thin film () and a second optical thin film (), wherein, in a spatially partly overlapping and interference-free manner, the first optical thin film () is arranged on a first surface () and the second optical thin film () is arranged on a second surface () of the substrate (). A spectrometer () equipped with a respective order sorting filter is used in a scanning method for detecting the absorption spectrum of samples examined in wells () of microplates (). 11. A spectrometer () , comprising{'b': '2', '(a) a light source ();'}{'b': 3', '4, '(b) a monochromator () with at least one diffraction grating ();'}{'b': '5', '(c) a monochromator housing ();'}{'b': 7', '4', '3, '(d) an order sorting filter (), which is provided upstream or downstream of the diffraction grating () of the monochromator ();'}{'b': 12', '13', '14, '(e) a microplate receptacle () which is formed for accommodating at least one microplate (), which at least approximately has a format of microplates according to the ANSI standard and comprises a number of wells (), and'}{'b': '6', '(f) a controller (),'}{'b': 7', '1', '23', '24', '25', '24', '26', '23', '25', '27', '23, 'characterized in that the order sorting filter () of said spectrometer () comprises a substrate (), a first optical thin film () and a second optical thin film (), wherein, in a spatially partly overlapping and interference-free manner, the first optical thin film () is arranged on a first surface () of the substrate () and the second optical thin film () is arranged on a second surface () of the substrate ().'}21743476743. The spectrometer () according to claim 1 , characterized in that the order sorting filter () and the diffraction ...

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 ...

HIGH RESOLUTION BROADBAND MONOLITHIC SPECTROMETER AND METHOD

A monolithic spectrometer () for spectrally resolving light (L), comprises a body () of solid material having optical surfaces (-) configured to guide the light (L) along an optical path (EEEE) inside the body (). The optical surfaces of the body () comprise a segmented focusing surface (,) comprising first and second continuously functional optical shapes (Ca,Cb) to focus received parts of respective beams (La,Lb) onto respective focal position (fa,fb) in an imaging plane (P) outside the body (). The second continuously functional optical shape (Cb) is separated from the first continuously functional optical shape (Ca) by an optical discontinuity (Dab) there between. 1. A monolithic spectrometer for spectrally resolving light , the monolithic spectrometer comprising a body of solid material having optical surfaces configured to guide the light along an optical path inside the body , the optical surfaces comprising:an entry surface configured to receive the light to enter into the body as an entry beam;a collimating surface configured to receive the entry beam and to reflect the entry beam as a collimated beam;a grating surface configured to receive the collimated beam and to reflect diffracted beams in different directions according to a wavelength dependent diffraction angle;a first focusing section configured to receive at least part of a first diffracted beam of the diffracted beams, the received at least part of the first diffracted beam having a first wavelength, the first focusing section having a first continuously functional optical shape to focus all received parts of the first diffracted beam onto a first focal position in an imaging plane outside the body;a second focusing section configured to receive at least part of a second diffracted beam of the diffracted beams, the received at least part of the second diffracted beam having a second wavelength, that is distinct from the first wavelength, the second focusing section having a second continuously ...

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 ...

VISIBLE-INFRARED PLANE GRATING IMAGING SPECTROMETER

An imaging spectrometer, covering the visible through infrared wavelengths, which disperses the light by a plane diffraction grating behind a wedged optical element. This design uses an achromatic doublet lens with a reflective coating on its convex back surface to produce the spectra on a flat detector. Spatial keystone distortion and spectral smile are controlled to less than one tenth of a pixel over the full wavelength range, facilitating the use of simple retrieval algorithms. 1. A visible-infrared plane grating imaging spectrometer , comprising:an entrance slit for transmitting light,an achromatic lens with a reflective back surface,a plane reflective diffraction grating immersed in a wedged optical element,an order sorting filter,a visible-infrared detector;said entrance slit, said achromatic lens with a reflective back surface, said plane reflective diffraction grating immersed in a wedged optical element, said order sorting filter, and said detector for visible and infrared radiation positioned wherein,said entrance slit transmits light to said achromatic lens with reflective back surface, which refracts light and then reflects the light from the back surface, passing back through the lens and is directed to said plane reflective diffraction grating immersed in a wedged optical element, said wedged optical element refracts the light then the reflective diffraction grating spectrally disperses and directs the light back through wedged optical element, which refracts light to said achromatic lens with a reflective back surface, said achromatic lens with a reflective back surface refracts light and then reflects the light from the back surface, passing hack through the lens and focuses it to said order sorting filter, said order sorting filter transmits the selected spectral orders to the said visible-infrared detector.2. The visible-infrared plane grating imaging spectrometer of wherein the optical powers of the said achromatic lens element with and the power ...

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 ...

TECHNIQUE AND APPARATUS FOR SPECTROPHOTOMETRY USING BROADBAND FILTERS

A spectrophotometer is provided, which comprises a receiving part diffusing an incident light, a first broadband filter group, and a detector detecting the light having passed through the first broadband filter group, in order to easily select and detect a plurality of lights having specific wavelengths, wherein the first broadband filter group comprises a first broadband filter arranged to have a first angle with respect to an incident direction of light to enable the incident light to pass through a first wavelength band, a second broadband filter arranged to have a second angle, which is different from the first angle, with respect to an incident direction of light to enable the light having passed through the first broadband filter to pass through a second wavelength band, and a first path compensation means for adjusting a path of the light having passed through the second broadband filter to be identical to a path of the light having passed through the first broadband filter, wherein the first broadband filter, the second broadband filter and the first path compensation means are arranged in series with respect to the incident direction of light. Accordingly, it is possible to increase the efficiency of the outputted light compared to the incident light, and to detect a plurality of lights having the desired specific wavelengths at the same time. 1. A spectrophotometer for analyzing a light having a specific wavelength band from an incident light , the spectrophotometer comprising:a receiving part diffusing an incident light from one side at the other side, wherein the receiving part is configured of one of an optical fiber, a rod and a concave lens, which can diffuse an incident light;a first broadband filter group; anda detector detecting the light having passed through the first broadband filter group,wherein the first broadband filter group comprises a first broadband filter arranged to have a first angle with respect to an incident direction of light to ...

TEMPERATURE INSENSITIVE FILTER

An integrated wavelength-selective filter device comprises a first optical element, for directing received radiation into a direction defined by a first angle, and a second optical element being a diffractive element configured for diffracting the directed radiation under a second angle. The second angle is such that for a single reference wavelength the diffracted radiation is directed into a propagation medium for advancing therein towards a predetermined position on the first optical element or on a further optical element for filtering radiation having a wavelength substantially matching the reference wavelength from radiation having a substantially different wavelength. The propagation medium is formed from a material that is different from any material of the substrate of the first and the second optical element. 117.-. (canceled)18. An integrated wavelength-selective filter device comprising:a first optical element patterned in or on a substrate, the first optical element being configured for receiving radiation incident thereon and for directing at least partially said received radiation into a direction defined by a first angle,a second optical element patterned in or on a substrate, the second optical element being a diffractive element and extending longitudinally and arranged distantly to the first optical element, the second optical element being configured for receiving said directed radiation under an angle of incidence and adapted for diffracting said directed radiation under a second angle, said second angle depending on wavelength,wherein the first optical element is directing said received radiation into a propagation medium, said directed radiation propagating through the propagation medium until being received at the second optical element, the propagation medium being formed from a material being different from any material of said substrate of said first and said second optical element, andwherein the second optical element is configured such ...

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 ...

Spectroscope

A spectroscope includes a first substrate and a second substrate opposite to each other; a light introducing assembly on a side of the first substrate facing away from the second substrate; a temperature adjusting assembly between the first substrate and the second substrate; a liquid crystal dimming assembly between the first substrate and the second substrate, wherein the temperature adjusting assembly is configured to adjust a temperature of the liquid crystal dimming assembly, so as to adjust spectrum of light passing through the liquid crystal dimming assembly; a spectroscopic grating on the first substrate; a reflector on the second substrate and configured to reflect incident light introduced by the light introducing assembly to the spectroscopic grating; and a plurality of sensors configured to receive the incident light after being subjected a light splitting by the spectroscopic grating. A wavelength of the incident light received by each sensor is different.

Simultaneous overlapping order spectral imager and method

An imaging spectrometer and method are provided. In one example, the imaging spectrometer includes foreoptics positioned to receive electromagnetic radiation from a scene, a diffraction grating positioned to receive the electromagnetic radiation from the foreoptics and configured to disperse the electromagnetic radiation into a plurality of spectral bands, each spectral band corresponding to a diffraction grating order of the diffraction grating, and a single-band focal plane array configured to simultaneously receive from the diffraction grating overlapping spectra corresponding to at least two diffraction grating orders.

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 ...

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 ...

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.

THERMAL IMAGING WITH AN INTEGRATED PHOTONICS CHIP

An integrated photonics chip for thermal imaging comprises a photonics substrate including a plurality of receiver elements. Each receiver element comprises a first grating coupler optically coupled to a first waveguide filter and configured to receive a first wavelength of light at a given angle, with the first waveguide filter configured to pass the first wavelength of light; and a second grating coupler optically coupled to a second waveguide filter and configured to receive a second wavelength of light at the given angle, with second waveguide filter configured to pass the second wavelength of light. Each receiver element receives the wavelengths of light from an object of interest that emits the light due to blackbody radiation, and receives the wavelengths of light at respectively different angles. Each grating coupler receives a unique wavelength of light with respect to the other wavelengths of light received by the other grating couplers. 1. An integrated photonics chip for thermal imaging , the integrated photonics chip comprising: a first grating coupler optically coupled to a first waveguide filter, wherein the first grating coupler is configured to receive a first wavelength of light at a given angle, and the first waveguide filter is configured to pass the first wavelength of light; and', 'a second grating coupler optically coupled to a second waveguide filter, wherein the second grating coupler is configured to receive a second wavelength of light at the given angle, and the second waveguide filter is configured to pass the second wavelength of light;, 'a photonics substrate including a plurality of receiver elements, each of the receiver elements comprisingwherein each of the receiver elements is configured to receive the wavelengths of light from an object of interest that emits the light due to blackbody radiation;wherein each of the receiver elements is configured to receive the wavelengths of light at respectively different angles from the object ...

LAMELLAR GRATING INTERFEROMETER HAVING STRESS-DISPERSIBLE SUPPORT STRUCTURE

The present invention relates to a lamella grating interferometer capable of being employed in a Fourier transform infrared (FTIR) spectrometer, the interferometer including a reflective surface in a circular shape and provided with a fixed portion including fixed mirrors and a movable portion including movable mirrors that are arranged with the fixed mirrors in a crossing manner to form a lamella structure with the fixed mirrors, a plurality of driving units disposed at outside the reflective surface and configured to apply driving forces for moving the movable portion, and a plurality of driving arms connecting the driving units to the movable portion of the reflective surface, respectively, and configured to move the movable portion in response to the driving forces applied by the driving units, wherein each of the plurality of driving arms is formed in a structure of repeating a preset bent shape plural times. 1. A lamella grating interferometer employed in a Fourier transform infrared (FTIR) spectrometer , the interferometer comprising:a reflective surface in a circular shape and provided with a fixed portion including fixed mirrors and a movable portion including movable mirrors that are arranged with the fixed mirrors in a crossing manner to form a lamella structure with the fixed mirrors;a plurality of driving units disposed at outside the reflective surface and configured to apply driving forces for moving the movable portion; anda plurality of driving arms connecting the driving units to the movable portion of the reflective surface, respectively, and configured to move the movable portion in response to the driving forces applied by the driving units,wherein each of the plurality of driving arms is formed in a structure of repeating a preset bent shape plural times.2. The interferometer of claim 1 , wherein the preset shape is a spring shape capable of absorbing impact or pressure.3. The interferometer of claim 2 , wherein the preset shape is a shape like ...

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 ...

RECONSTRUCTING LIGHT WAVELENGTH SPECTRUM WITH THIN-FILM DEVICE

A spectrometer device includes: a substrate including multiple light detector elements; a first filter layer on the substrate, in which the first filter layer includes multiple groups of filter stacks, each filter stack in the first filter layer including multiple dielectric films of alternating refractive index; and a second filter layer on the first filter layer, in which the second filter layer includes multiple groups of filter stacks, each filter stack in the second filter layer including multiple dielectric films of alternating refractive index, in which each filter stack in the second filter layer is aligned with both a corresponding filter stack in the first filter layer and a corresponding light detector element to define a respective photodetector channel, and in which each photodetector channel includes a different optical transmission spectrum. 1. A spectrometer device comprising:a substrate comprising a plurality of light detector elements;a first filter layer on the substrate, wherein the first filter layer comprises multiple groups of filter stacks, each filter stack in the first filter layer comprising multiple dielectric films of alternating refractive index; anda second filter layer on the first filter layer, wherein the second filter layer comprises multiple groups of filter stacks, each filter stack in the second filter layer comprising multiple dielectric films of alternating refractive index,wherein each filter stack in the second filter layer is aligned with both a corresponding filter stack in the first filter layer and a corresponding light detector element to define a respective photodetector channel, andwherein each photodetector channel comprises a different optical transmission spectrum.2. The spectrometer device of claim 1 , wherein each group of filter stacks in the first filter layer comprises a same first plurality of different filter stacks claim 1 ,wherein each group of filter stacks in the second filter layer comprises a same ...

IMAGE SENSOR

The present invention provides an image sensor, including: a sensor array layer formed of a plurality of normal sensor units and a plurality of spectrometer sensor units; a first guided mode resonance (GMR) structure having a first grating pitch and disposed on the sensor array layer to cover N (where N is an integer) of the spectrometer sensor units; a second GMR structure having a second grating pitch and disposed on the sensor array layer to cover N of the spectrometer sensor units; and a plurality of color filter units disposed on the sensor array layer to cover the normal sensor units. 1. An image sensor , comprisinga sensor array layer formed of a plurality of normal sensor units and a plurality of spectrometer sensor units;a first guided mode resonance (GMR) structure having a first grating pitch and disposed on the sensor array layer to cover N (where N is a positive integer) of the spectrometer sensor units;a second GMR structure having a second grating pitch and disposed on the sensor array layer to cover N of the spectrometer sensor units; anda plurality of color filter units disposed on the sensor array layer to cover the normal sensor units.2. The image sensor as claimed in claim 1 , further comprising:a clear structure having no gratings and disposed on the sensor array layer to cover N of the spectrometer sensor units.3. The image sensor as claimed in claim 1 , wherein the first GMR structure is divided into a first grating area with the first grating pitch and a first clear area without gratings claim 1 , and the second GMR structure is divided into a second grating area with the second grating pitch and a second clear area without gratings.4. The image sensor as claimed in claim 3 , wherein the first clear area is arranged at a side of the first grating area claim 3 , and the second clear area is arranged at a side of the second grating area.5. The image sensor as claimed in claim 3 , wherein the first clear area surrounds the first grating area ...

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 ...

An imaging system and a light encoding device therefor

A spectral imaging system comprises: a spatial encoder comprising a first light encoding device comprising a first mask for spatial encoding, the first mask being configured with one or more encoding patterns; a spectral encoder comprising: a dispersion arrangement for splitting spatially encoded light from the first light encoding device into a plurality of components; and a second light encoding device comprising a second mask for spectral encoding of the plurality of components, the second mask having one or more encoding patterns; and at least one single-pixel photodetector positioned to measure light that is encoded by the masks. The spatial encoder is operable to spatially encode light by generating a sequence of different patterns or partial patterns of the one or more encoding patterns of the first mask. The spectral encoder is operable to spectrally encode light by relative movement between the dispersion arrangement and the second mask.

SUBJECT IDENTIFICATION DEVICE AND SUBJECT IDENTIFICATION METHOD

A subject identification device includes: an illuminator configured to generate illumination light including components at a plurality of wavelength bands, each of the components having a characteristic in accordance with a respective one of settings; an imager configured to generate an image signal by capturing light from a subject under the illumination light having the illumination characteristic; and a processor including hardware. The processor is configured to: define an illumination characteristic of the illumination light; analyze the image signal to acquire spectral information of the subject; and cross check the spectral information of the subject with subject identification information in order to identify the subject. When the subject is not identified, the processor is configured to define another illumination characteristic that causes spectral information of potentials for the subject to be identified, and subsequently each of the imager and the processor performs a process. 1. A subject identification device comprising:an illuminator configured to generate illumination light including components at a plurality of wavelength bands, each of the components having a characteristic in accordance with a respective one of settings;an imager configured to generate an image signal by capturing light from a subject under the illumination light having the illumination characteristic; and define an illumination characteristic of the illumination light;', 'analyze the image signal to acquire spectral information of the subject; and', 'cross check the spectral information of the subject with subject identification information in order to identify the subject, wherein, 'a processor comprising hardware, the processor being configured towhen the subject is not identified, the processor is configured to define another illumination characteristic that causes spectral information of potentials for the subject to be identified, and subsequently each of the imager and the ...

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': ...

Dielectric mirror based multispectral filter array

An optical sensor device may include a set of optical sensors. The optical sensor device may include a substrate. The optical sensor device may include a multispectral filter array disposed on the substrate. The multispectral filter array may include a first dielectric mirror disposed on the substrate. The multispectral filter array may include a spacer disposed on the first dielectric mirror. The spacer may include a set of layers. The multispectral filter array may include a second dielectric mirror disposed on the spacer. The second dielectric mirror may be aligned with two or more sensor elements of a set of sensor elements.

MULTI-STAGE PARALLEL SPECTROSCOPY SYSTEMS AND METHODS

A multi-stage parallel spectroscopy system has a plurality of dispersion stages, with the output of one dispersion stage serving as input to the next dispersion stage. Each dispersion stage separates input radiation into respective spectral components along a respective dispersion axis. In embodiments, the dispersion axes for the dispersion stages are substantially parallel to each other. Thus, the disclosed systems may be considered single-axis parallel spectroscopy configurations, in contrast to cross-axis parallel spectroscopy configurations. An optical system disposed in an optical path between dispersion stages can spatially filter a set of wavelengths from the input to the next dispersion stage to increase spectral extinction without sacrificing throughput or parallel operation. In some embodiments, the same dispersive element provides the spectral separation for multiple dispersion stages, by way of a recirculating optical system that redirects the spectral output from the dispersive element back to its input. 1. A parallel spectroscopy system comprising:a first dispersion stage constructed to spatially separate radiation input to the first dispersion stage into respective spectral components along a first dispersion axis;a second dispersion stage constructed to spatially separate radiation input to the second dispersion stage into respective spectral components along a second dispersion axis; andan optical system disposed in an optical path between an output of the first dispersion stage and an input of the second dispersion stage, the optical system being constructed to direct a first set of wavelengths in the spectral components output from the first dispersion stage to the input of the second dispersion stage,wherein the first dispersion axis is substantially parallel to the second dispersion axis, andthe optical system is constructed to attenuate a second set of wavelengths in the spectral components output from the first dispersion stage from input to ...

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 ...

Optical filter and spectrometer including sub-wavelength double grating structure, and optical apparatus including the optical filter and spectrometer

An optical filter may include a first reflector and a second reflector. The first reflector may include a plurality of first gratings having a first sub-wavelength dimension and being arranged to recur at a first interval in a first direction. The second reflector may be spaced apart from the first reflector and include a plurality of second gratings having a second sub-wavelength dimension and arranged to recur at a second interval in a direction parallel to the first direction. The first reflector and the second reflector may include different materials or different geometric structures from each other. Accordingly, it is easy to adjust the transmission wavelength characteristics of the optical filter.

METHOD, APPARATUS AND COMPUTER PROGRAM FOR MEASURING AND PROCESSING A SPECTRUM OF AN XUV LIGHT SOURCE FROM SOFT X-RAYS TO INFRARED WAVELENGTH

Method for measuring and processing by means of a broadband spectrometer () a spectrum of light () generated by an XUV source for generating light in a wavelength range from soft x-rays to infrared wavelengths, wherein the processing is based on the assessment of a wavelength range in the measured spectrum which has a negligible higher order contribution to longer-wavelengths than said range. 1. Method for measuring and processing by means of a broadband spectrometer a spectrum of light in a wavelength range from soft x-rays to infrared wavelengths , comprising the steps of:a) assessing in a measured spectrum a longest wavelength λ0, such that the contribution of higher diffraction orders of wavelengths shorter than the longest wavelength λ0 to the part of the spectrum for wavelengths longer than λ0 is below a previously defined value.2. The method as claimed in claim 1 , wherein the broadband spectrometer includes a shutter claim 1 , one of a pinhole and a slit claim 1 , at least one transmission grating and a camera claim 1 , wherein the processing further comprises the steps of:(b) removing for wavelengths λ, in the range given by λ0<λ<2λ0 a broadening in the intensity of the light as recorded by the camera, due to the pinhole or slit, and dividing the intensity in the resulting wavelength range by the efficiencies of the grating and the camera, thus obtaining a recovered spectrum in a first spectral range,(c) calculating contributions of all higher order diffractions in the range given by λ0<λ<2λ0 to the range given by 2λ0<λ<4λ0 and subtracting these contributions from the intensity of the light as recorded by the camera, thus obtaining a recovered spectral range for wavelengths λ in the range given by 2λ0<λ<4λ0, and(d) repeating the calculation according to steps (b) and (c) for the next adjacent wavelength range, thus obtaining a next adjacent recovered spectral range for wavelengths λ in a next adjacent range, until the complete spectrum as recorded by the ...

Metal mirror based multispectral filter array

A device may include a multispectral filter array disposed on the substrate. The multispectral filter array may include a first metal mirror disposed on the substrate. The multispectral filter may include a spacer disposed on the first metal mirror. The spacer may include a set of layers. The spacer may include a second metal mirror disposed on the spacer. The second metal mirror may be aligned with two or more sensor elements of a set of sensor elements.

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.

APPARATUS AND METHOD FOR CALIBRATING MEASURING INSTRUMENTS

A method and apparatus is provided for implementing a parametric down-conversion (PDC)-based calibration comprising calibrating a measuring instrument; disposing a pinhole at a position of a light-emitting sample for which the measuring instrument needs to be calibrated; irradiating a nonlinear crystal with a light source; setting the nonlinear crystal by ensuring a phase-matching wavelength of the nonlinear crystal is set at one boundary of a desired bandwidth; acquiring one or more PDC spectrums by the measuring instrument; obtaining peak values and their corresponding wavelengths from each acquired spectrum; and obtaining a response function based on the peak values and corresponding wavelengths. 1. An apparatus for implementing a parametric down-conversion (PDC)-based calibration comprising:a light source;a nonlinear crystal irradiated by the light source;an optical component in line with the nonlinear crystal for suppressing the light source and collecting down-converted light from the nonlinear crystal;a collimating optical component for receiving the down-converted light from the nonlinear crystal;a polarizing beam splitter (PBS) for adjusting the polarization of the down-converted light; anda regulator for adjusting an angular width of the radiation of the down-converted light.2. The apparatus of claim 1 , wherein the nonlinear crystal is adjustable to alter a phase-matching condition of the nonlinear crystal.3. The apparatus of claim 2 , wherein the adjustment is made by rotating the nonlinear crystal.4. The apparatus of claim 2 , wherein the adjustment is made by changing the temperature of the nonlinear crystal.5. The apparatus of claim 1 , wherein the optical component is a dichroic mirror.6. The apparatus of claim 1 , wherein the collimating optical component is a concave mirror or an achromatic lens.7. The apparatus of claim 1 , wherein the light source is a laser.8. The apparatus of claim 1 , wherein the parametric down-conversion (PDC)-based ...

Plasma emission monitoring system with cross-dispersion grating

Embodiments disclosed herein include an optical sensor system. In an embodiment, the optical sensor system comprises a processing chamber and a sensor. In an embodiment, the sensor comprises a first diffraction grating oriented in a first direction, a second diffraction grating oriented in a second direction, and a detector for detecting electromagnetic radiation diffracted from the first grating and the second grating. In an embodiment, the optical sensor system further comprises an optical coupling element, where the optical coupling element optically couples an interior of the processing chamber to the sensor.

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. 1. A light splitting device , comprising: an optical waveguide body and a dispersion grating; whereinthe 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.2. The light splitting device according to claim 1 , further comprising: a first light-transparent layer and a second light-transparent layer that are opposite to each other; whereinthe optical waveguide body and the dispersion grating are disposed between the first light-transparent layer and the second light-transparent layer anda refractive index of a material for the optical waveguide body and a refractive index of a material for the dispersion grating are both greater than a refractive index of a material for the first light-transparent layer and are both greater than a refractive index of a material for the second light-transparent layer.3. The light splitting device according to claim 2 , wherein the optical waveguide body includes: an input waveguide and an array of output waveguides; whereinthe input waveguide is configured to supply the received incident light to the dispersion grating, and the array of output waveguides is configured to guide 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 ...

MULTICHANNEL BROADBAND HIGH-RESOLUTION SPECTROGRAPH

The present invention discloses a multichannel broadband high-resolution spectrograph, comprising a plurality of light source incident slits, a multichannel integrated grating, a multichannel shared two-dimensional focus imaging mirror and a two-dimensional area array detector which are sequentially disposed along a light source incident or reflection line, wherein the multichannel integrated grating consists of a plurality of sub-gratings, incident light enters the corresponding integrated gratings along the light source incident slits and then is focused by the shared two-dimensional focus imaging mirror after diffraction of the integrated grating, and diffraction light in a full-spectrum region is incident onto a focal plane of the two-dimensional area array detector for detection. No any mechanical displacement part is disposed, multichannel, full-spectrum and high-speed detection and analysis is achieved, and the present disclosure has high spectrum resolution and working reliability. 1. A multichannel broadband high-resolution spectrograph , characterized by comprising a plurality of light source incident slits , a multichannel integrated grating , a multichannel shared two-dimensional focus imaging mirror and a two-dimensional area array detector which are sequentially disposed along a light source incident or reflection line , wherein the multichannel integrated grating consists of a plurality of sub-gratings;each light source incident slit is used as a spectrum channel incident port, the sub-gratings are combined to form an independent integrated grating according to the number of spectrum channels, a light source enters a collimating mirror through the slits, a direction perpendicular to an incident surface is a y direction, each sub-grating is disposed along the y direction, and each sub-grating has the same diffraction angle range along an x direction in which diffraction wavelengths are distributed in the incident surface; andincident light enters the ...

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 ...

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 ...

Spectroscopic instrument and process for spectral analysis

一种基于偏振特性的分布式反射消除的装置及方法

本发明公开了一种基于偏振特性的分布式反射消除技术能够解决因光源偏振态引起的反射光影响成像质量问题的基于偏振特性的分布式反射消除的装置及方法。该基于偏振特性的分布式反射消除的装置包括射向被识别透明物体的光源以及拍摄被识别透明物体的摄像机；所述光源上设置有工控机以及光源前端安装有光源偏振片；所述摄像机上连接有PC控制器，所述摄像机的镜头前端安装有镜头偏振片。该基于偏振特性的分布式反射消除方法通过光源偏振片首先消除S偏振态的光，再通过镜头偏振片隔离掉反射来的S偏振态的光；从而实现反射消除。采用该基于偏振特性的分布式反射消除的装置及方法可减少反射光影响，提高成像对比度优化成像质量。

Optical filter and spectrometer including sub-wavelength double grating

광학 필터는 서브 파장의 제1 형상 치수를 가지며, 일방향을 따라 제1주기로 주기적 배열된 복수의 제1 그레이팅을 포함하는, 제1 리플렉터; 상기 제1 리플렉터와 이격 배치된 것으로, 서브 파장의 제2 형상 치수를 가지며 상기 일방향과 나란한 방향을 따라 제2주기로 주기적 배열된 복수의 제2 그레이팅을 포함하는, 제2 리플렉터;를 포함한다. 상기 제1 리플렉터와 상기 제2 리플렉터는 재질 또는 기하학적 구조가 서로 다르며, 이에 따라 투과 파장 특성을 조절하기 용이하다.

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。

Automatic monochromator-testing system

An automated chemistry-testing system for analyzing serum samples in which a controlled intensity, monochromatic light beam of substantially any desired wavelength can be selectively directed through any one of a plurality of test solutions in a spectrophotometer. The system operates at very high speed, permitting serum test solutions to be scanned with a multiplicity of wavelengths of light to provide extensive data on the characteristics of the serum. The invention also provides substantial flexibility and permits a wide variety of test to be more reliably performed.

System for spectral analysis

Optical coherence tomography phase unwrapping method and device

本发明公开了一种光学相干层析相位解卷绕的装置，包括，宽带光源，用于发出光线；耦合器，用于将光线进行耦合；第一透镜，用于将发散光线变为准直光线；第二透镜，用于将发散光线变为准直光线；第三透镜，用于将准直光线进行汇集；光学玻璃，用于实现部分光线的透射和部分光线的反射；样品台，用于盛放样品；透射光栅，用于产生衍射光谱；第四透镜，用于将光线进行汇集；CCD线阵相机，用于采集光谱信息，并将光谱信息传输到处理器；处理器，用于对光谱信息进行分析。本发明能够改进现有技术的不足，解决SDOCT中相位卷绕的问题。

Temperature insensitive filter

一种集成波长选择滤波器设备(10；20；30；40)，包括：第一光学元件(14)，其用于将接收到的辐射定向到由第一角(α)定义的方向上，以及第二光学元件(15)，其是被配置成以第二角对所述定向辐射进行衍射的衍射元件。第二角如下：对于单个参考波长，衍射辐射被定向到传播介质中以在其中向第一光学元件或另一光学元件上的预定位置行进以便从具有显著不同的波长的辐射中过滤具有与所述参考波长基本匹配的波长的辐射。传播介质由不同于第一和第二光学元件的基板的任何材料的材料形成。

Spectrometer and imaging apparatus

본 실시예에 의한 분광기는, 제공된 광을 분광하는 제1 회절 격자와, 제1 회절 격자가 분광한 광을 집광하여 상응하는 전기적 신호로 출력하는 제1 검출부와, 제1 회절 격자로부터 출력된 0차(0th order) 광을 분광하는 제2 회절 격자 및 제2 회절 격자가 분광한 광을 집광하여 상응하는 전기적 신호로 출력하는 제2 검출부를 포함한다. The spectrometer according to this embodiment includes a first diffraction grating for diffusing the provided light, a first detector for condensing the light split by the first diffraction grating and outputting a corresponding electrical signal, and zero output from the first diffraction grating. It includes a second diffraction grating for splitting 0th order light and a second detector for condensing the light split by the second diffraction grating and outputting a corresponding electric signal.

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。

Electron Beam Instrument comprising Monochromator

The present invention relates to an electron beam apparatus including a monochromator, capable of selecting an electron beam of a central energy range by symmetrically arranging a cylindrical electrostatic lens for deflecting the path of the electron beam in the monochromator and arranging an aperture including a plurality of selectable slits between the lenses. Spatial resolution and energy resolution can be improved by including the monochromator with high resolution and high maintenance and repair performance by arranging the slit and a circular opening part in one aperture parts in parallel.

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.

SPECTROGRAPHY DEVICE.

Patent FR2176888B1

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。

Spectrometer with monochromator and order selection optical filter

一种光谱仪(1)，包括光源(2)、具有至少一个衍射光栅(4)的单色器(3)、单色器壳体(5)、阶数选择滤光器(7)、微孔板容器(12)和控制器(6)。所述光谱仪(1)的阶数选择滤光器(7)包括基板(23)、第一光学薄膜(24)和第二光学薄膜(25)，其中，以在空间上部分重叠且无干扰的方式，将第一光学薄膜(24)设置在基板(23)的第一表面(26)上，并且将第二光学薄膜(25)设置在基板(23)的第二表面(27)上。装备有相应的阶数选择滤光器的光谱仪(1)在用于检测在微孔板(13)的孔(14)中检查到的样品的吸收光谱的扫描方法中使用。

Spectroscopy device, spectroscopy method and biological signal measuring apparatus

분광 장치와, 분광 방법, 및 생체신호 측정장치가 개시된다. 일 실시예에 따른 분광 장치는 입사광을 1차 분광하는 분산 요소(dispersive element)와, 분산 요소에 의해 분광된 광을 2차 분광하되 분산 요소보다 높은 분광 분해능으로 2차 분광하여 디텍터로 제공하는 필터 어레이(filter array)를 포함할 수 있다.

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

Automatic monochromator-testing system

An automated chemistry-testing system for analyzing serum samples in which a controlled, constant intensity, monochromatic light beam of substantially any desired wavelength can be selectively directed through any one of a plurality of test solutions in a spectrophotometer. The system comprises a monosource (11) to provide substantially monochromatic light of different wavelengths, an intensity monitor (12) to monitor the light intensity at each wavelength, a variable aperture system (82) that is adjusted in real-time to control the intensity of monochromatic light exiting the monosource (11), a wavelength calibrator (13) to insure that the selected wavelength of light will be produced when it is desired and fiber-optical pathways (21-24) to direct the light beam from the monosource (11) to each of a plurality of flow cells (97) containing test solutions to be evaluated. The system operates at very high speed, permitting serum tests solutions to be scanned with a multiplicity of wavelengths of light to provide extensive data on the characteristics of the serum. The invention also provides substantial flexibility and permits a wide variety of tests to be more reliably performed.

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.

Optical system for a multidetector array spectrograph

An optical system for a multidetector array spectrophotometer which includes multiple light sources for emitting light of selected wavelength ranges and means for selectively transmitting the selected wavelength ranges of light to respective slits of a multi-slit spectrogrpah for multiple wavelength range detection. The spectrograph has two or more slits which direct the selected wavelength ranges of the light spectra to fall upon a dispersive and focusing system which collects light from each slit, disperses the light by wavelength and refocuses the light at the positions of a single set of detectors.

Method associated with the performance of spectral analysis with separation of the spectral orders and a spectral apparatus for putting the method into effect

1424091 Spectrometric apparatus N A DANIELSSON and K P C LINDBLOM 15 March 1973 [17 March 1972] 12628/73 Heading G1A [Also in Divisions G2 and G3] To reduce the differences in the separations of spectral orders on a focal surface in a spectral apparatus, light is first dispersed by a prismgrating combination 26, 28 and then by a grating having its dispersion crossed with that of the prismgrating combination after which the rays are focused on to the focal surface. As shown, a combination of a plane grating 26 and a prism 28 is used to seperate the diffraction orders of an echelle grating 37. Light enters casing 31 via slit 33, is reflected at 35 and is dispersed by normally to the plane of the Fig. the prism 28 and the grating 26 in the plane of the Fig by the echelon 37. A concave mirror 38 focuses the spectrum in a plane 39 where it may be viewed or recorded e.g. by a photo-electric image tube. The prism-grating combination may comprise a transmission grating mounted ahead of a Littrow prism. The grating may be concave. Several combinations of grating and prisms may be used.

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.

Object-specifying device and object-specifying method

被写体特定装置は、複数の波長帯域の成分からなり、各成分が設定に応じた特性を有する照明光を生成する照明部と、照明光の照明特性を決定する照明特性決定部と、照明特性を有する照明光のもとで被写体からの光を撮像することによって画像信号を生成する撮像部と、画像信号を解析して被写体の分光情報を取得する画像解析部と、被写体の分光情報を被写体特定情報と照合することによって被写体を特定する照合部と、を備え、照合部が被写体を特定できない場合、照明特性決定部が被写体の候補の分光情報を識別可能な別の照明特性を決定した後、撮像部、画像解析部および照合部がそれぞれ処理を行う。

Spectrometer based upon tunable on-chip laser and spectrum measurement method

웨어러블 폼 팩터에 부합하는 소형화된 구성으로 낮은 수준의 에너지 소비를 유지하면서 높은 스펙트럼 해상도 및 연속 파장 조정으로 분광 측정을 제공하는 분광기는 대상체에 레이저 방사선을 조사하는, 반도체 이득 칩을 포함하는 조정 가능한 온 칩 레이저; 상기 대상체로부터 반사된 방사선을 수신하는 광검출기; 및 상기 광검출기로부터의 신호를 제어하고 데이터를 처리하는 프로세서를 포함한다.

Device for controlling the rotation of the dispersive device of a monochromator

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.

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。

Atomic emission spectrometer with background compensation

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. .

Optical system of signal detection for near-infrared and tera hertz wave band using beam splitter

본 발명은 빔 스플리터를 이용하여 근적외선 신호 및 테라헤르츠 대역의 신호를 검출하는 광학 시스템에 관한 것으로 이러한 본 발명의 한 실시예는 광통부를 가지는 제1 주반사경과 상기 제1 주반사경의 둘레에 위치하는 복수개의 제2 주반사경을 구비한 주반사경부, 상기 주반사경부와 마주보게 위치하며, 상기 제1 및 제2 주반사경에서 반사된 빛을 상기 광통부로 반사시키는 부반사경부, 상기 광통부 하단에 위치하며 상기 광통부를 통과한 빛 중 테라헤르츠(tera hertz) 대역의 신호를 통과시키고 나머지 빛을 반사시키는 빔 스플리터(beam splitter), 상기 빔 스플리터로부터 반사된 빛에서 적외선을 필터링하여 상을 맺어주는 제1 결상광학계, 상기 제1 결상광학계에 의해 얻어진 상기 상을 촬상하여 전기적인 신호로 출력하는 이미지 센서(image sensor), 상기 빔 스플리터를 통과한 상기 테라헤르츠 대역의 신호를 필터링(filtering)하는 제2 결상광학계, 그리고 상기 제2 결상광학계에 의해 필터링된 상기 테라헤르츠 대역의 신호를 검출하는 테라헤르츠 검출기를 포함한다.

AWG spectrum sensor

본 발명은 AWG 분광센서에 관한 것으로, AWG 분광센서는 광을 다수의 경로로 분리하는 빔스프리터; 상기 빔스프리터의 다수의 경로에서 분리된 광을 입력받아 투과시키고, 서로 상이한 투과 스펙트럼을 출력하는 멀티 AWG(Arrayed waveguide grating)소자; 및 상기 멀티 AWG소자에서 출력된 투과 스펙트럼의 세기를 측정하는 세기 측정부;를 포함한다.

Echelle polychromator

Device for controlling the rotation of the dispersive device of a monochromator

Bandgap measurements of patterned film stacks using spectrometry

Cinespectrograph spectrum order separation

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 comprising light filter

대역 통과 필터를 이용하여, 입사되는 광을 파장별로 분광하는 소형 광 분광기가 개시된다. 개시된 광 분광기는 투광성 물질로 형성된 기판, 상기 기판의 일 면에 마련되는 것으로, 복수개의 광 필터를 포함하는 필터 어레이(filter array) 및 상기 필터 어레이에 의해 반사된 광이 입사되는 제1 광 디텍터를 포함한다. Disclosed is a compact optical spectrometer that uses a band-pass filter to separate incident light for each wavelength. The disclosed light spectrometer includes a substrate formed of a translucent material, a filter array provided on one surface of the substrate, and a filter array including a plurality of optical filters, and a first optical detector to which light reflected by the filter array is incident. include

Raman Spectroscopy Based Assay For Both Low and High Abundant Biomolecules in a Biological Fluid Sample

A system and method for assaying high and low abundant biomolecules within a biological fluid sample is provided. The method includes: a) placing a biological fluid sample in contact with a first nanostructure surface; b) interrogating the sample with a light source, the sample in contact with the first nanostructure surface, the interrogation using a SERS technique; c) detecting an enhanced Raman scattering from at least one high abundant biomolecule type and producing first signals representative thereof; d) placing the sample in contact with a second nanostructure surface having a targeting agent that targets a low abundant biomolecule; e) interrogating the sample with the light source using the SERS technique; f) detecting the enhanced Raman scattering from the low abundant biomolecules and producing second signals representative thereof; and g) assaying the biological fluid sample using the first signals and the second signals.

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.

Technique and apparatus for spectrophotometry using broadband filters

A spectrophotometer is provided, which comprises a receiving part diffusing an incident light, a first broadband filter group, and a detector detecting the light having passed through the first broadband filter group, in order to easily select and detect a plurality of lights having specific wavelengths, wherein the first broadband filter group comprises a first broadband filter arranged to have a first angle with respect to an incident direction of light to enable the incident light to pass through a first wavelength band, a second broadband filter arranged to have a second angle, which is different from the first angle, with respect to an incident direction of light to enable the light having passed through the first broadband filter to pass through a second wavelength band, and a first path compensation means for adjusting a path of the light having passed through the second broadband filter to be identical to a path of the light having passed through the first broadband filter, wherein the first broadband filter, the second broadband filter and the first path compensation means are arranged in series with respect to the incident direction of light. Accordingly, it is possible to increase the efficiency of the outputted light compared to the incident light, and to detect a plurality of lights having the desired specific wavelengths at the same time.

Spectrometer system containing an interchangeable encoding cassette

An interchangeable encoding cassette and a spectrometer system employing such cassette, which cassette device encodes the spectral energy of radiation at the exit focal plane of a spectrometer, the spectral energy represented by horizontal and vertical components. The cassette device comprises a rotating encoding disc, a stationary aperture plate, a frame element, and a shaft secured to the encoding disc for rotation therewith. The frame includes bearings on which the shaft is mounted and includes a reference pin. The spectrometer includes a pair of locater mounts, each of which has a precision V groove adapted to receive the shoulders of the bearing element of the cassette, one of such locators having an adjustable track adapted to receive the pin element, whereby the shaft serves as a primary reference and the cassette device is adjusted into the desired precision position by the position of the reference pin in the restraining track.

Transmission filter for calibrating a wavelength selecting selector

Optikvorrichtung (100), aufweisend eine polychromatische elektromagnetische Strahlungsquelle (102) zum Emittieren polychromatischer elektromagnetischer Strahlung, eine Auswähleinrichtung (104) zum Auswählen eines Wellenlängenteilbereichs der polychromatischen elektromagnetischen Strahlung, und eine Kalibriereinrichtung (106) mit einem Transmissionsfilter (108) zum Kalibrieren der Auswähleinrichtung (104). Optical device (100) comprising a polychromatic electromagnetic radiation source (102) for emitting polychromatic electromagnetic radiation, selection means (104) for selecting a wavelength subset of said polychromatic electromagnetic radiation, and calibration means (106) having a transmission filter (108) for calibrating said selection means (10) 104).

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