Spectrometer arrangement

A spectrometer assembly ( 10 ), comprising an Echelle grating ( 18; 46 ) for dispersing radiation entering the spectrometer assembly ( 10 ) in a main dispersion direction, and a dispersion assembly ( 16; 40 ) for dispersing a parallel radiation bundle generated from the radiation entering the spectrometer assembly in a lateral dispersion direction, is characterized in that the dispersion assembly ( 16; 40 ) is reflective, and the dispersion assembly ( 16; 40 ) is arranged relative to the Echelle grating ( 18; 46 ) in such a way that the parallel radiation bundle is reflected in the direction of the Echelle grating. The Echelle grating ( 18; 46 ) may be arranged in such a way that the dispersed radiation is reflected back to the dispersion assembly ( 16; 40 ).

SPECTROSCOPIC MAPPING SYSTEM AND METHOD

A system and method for spectroscopic mapping, with configurable spatial resolution, of an object include a fiber optic bundle having a plurality of optical fibers arranged in a first array at an input end with each of the plurality of optical fibers spaced one from another and arranged in at least one linear array at an output end. A first mask defining a plurality of apertures equal to or greater in number than the plurality of optical fibers is positioned between an object to be imaged and the input end of the fiber optic bundle. An imaging spectrometer is positioned to receive light from the output end of the fiber optic bundle and to generate spectra of the object. A sensor associated with the imaging spectrometer converts the spectra to electrical output signals for processing by an associated computer. 1. A system for spectroscopic mapping of an object , the system comprising:a fiber optic bundle having a plurality of optical fibers arranged in a first array at an input end and arranged in at least one linear array at an output end;a first mask defining a plurality of apertures, the plurality of apertures equal to or greater in number than the plurality of optical fibers, the first mask disposed between an object to be imaged and the input end of the fiber optic bundle;an imaging spectrometer positioned to receive light from the output end of the fiber optic bundle and to generate spectra of the object; anda sensor associated with the imaging spectrometer that converts the spectra to electrical output signals.2. The system of wherein each of the plurality of optical fibers includes a core surrounded by a cladding and wherein the plurality of optical fibers are spaced one from another at the input end of the fiber optic bundle such that the cladding of each fiber does not contact the cladding of any other fiber.3. The system of wherein the plurality of fibers is arranged at the output end such that the cladding of each fiber contacts the cladding of at least ...

SPECTROSCOPE

A spectrometer A includes a package having a stem and a cap , an optical unit A disposed on the stem , and a lead pin for securing the optical unit A to the stem . The optical unit A includes a dispersive part for dispersing and reflecting light entering from a light entrance part of the cap , a light detection element having a light detection part for detecting the light dispersed and reflected by the dispersive part , a support for supporting the light detection element such that a space is formed between the dispersive part and the light detection element , and a projection protruding from the support , the lead pin being secured to the projection . The optical unit A is movable with respect to the stem in a contact part of the optical unit A and the stem

Spectrometer and manufacturing method thereof

A spectrometer includes an input unit for receiving an optical signal, a diffraction grating disposed on the transmission path of the optical signal for dispersing the optical signal into a plurality of spectral rays, an image sensor disposed on the transmission path of at least a portion of the spectral rays, and a waveguide device. A waveguide space is formed between the first and second reflective surfaces of the waveguide device. The optical signal is transmitted from the input unit to the diffraction grating via the waveguide space. The portion of the spectral rays is transmitted to the image sensor via the waveguide space. At least one opening is formed on the waveguide device, and is substantially parallel to the first and/or second reflective surface. A portion of the spectral rays and/or the optical signal diffuses from the opening out of the waveguide space without reaching the image sensor.

COLOR DISPERSION APPARATUS AND SPECTROMETER

The present disclosure relates to a dispersion apparatus. The dispersion apparatus may include an optical substrate; a grating layer on a first side of the optical substrate; and a light outlet layer on a second side of the optical substrate, the second side opposite the first side of the optical substrate. The grating layer is configured to perform dispersion of incident light into first-order diffracted beams having target wavelengths and transmit the first-order diffracted beams into the optical substrate, and wherein a diffraction angle of each of the first-order diffracted beams having the target wavelengths is smaller than a total reflection angle between the optical substrate and air. The light outlet layer is configured to extract the first-order diffracted beams having the target wavelengths in the optical substrate. 1. A dispersion apparatus , comprising:an optical substrate;a grating layer on a first side of the optical substrate; anda light outlet layer on a second side of the optical substrate, the second side opposite the first side of the optical substrate;wherein the grating layer is configured to perform dispersion of incident light into first-order diffracted beams having target wavelengths and transmit the first-order diffracted beams into the optical substrate, and wherein a diffraction angle of each of the first-order diffracted beams having the target wavelengths is smaller than a total reflection angle between the optical substrate and air; andwherein the light outlet layer is configured to extract the first-order diffracted beams having the target wavelengths in the optical substrate.2. The dispersion apparatus according to claim 1 , further comprising a collimated light source on a side of the grating layer opposite from the optical substrate claim 1 , wherein the collimated light source emits the incident light onto the grating layer.3. The dispersion apparatus according to claim 2 , wherein the grating layer comprises a plurality of ...

MOBILE GRATING-DETECTOR ARRANGEMENT

A mobile grating-detector arrangement has an X-ray detector and at least one grating. The grating-detector arrangement is configured to record an interferometric X-ray image of at least one body part of a patient in a patient bed in operation. In addition, an X-ray system with such a grating-detector arrangement and its use for X-ray interferometric imaging is described. 1. A mobile grating-detector configuration , comprising:an X-ray detector; andat least one grating configured to record an interferometric X-ray image of at least one body part of a patient in a patient bed in operation.2. The grating-detector configuration according to claim 1 , wherein:the grating-detector configuration is to be positioned between a flat, folded position and an unfolded position; andsaid at least one grating is one of a plurality of gratings and at least some of said gratings are disposed at defined intervals in the unfolded position.3. The grating-detector configuration according to claim 2 , wherein said gratings include a first grating and a second grating claim 2 , said first grating claim 2 , said second grating and said X-ray detector are disposed in parallel at least in the unfolded position.4. The grating-detector configuration according to claim 1 , further comprising a trolley connected to said X-ray detector and said at least one grating claim 1 , with an aid of said trolley claim 1 , said X-ray detector and said at least one grating can be positioned in relation to the patient.5. The grating-detector configuration according to claim 4 , further comprising a supporting plate for the patient.6. The grating-detector configuration according to claim 5 , wherein said supporting plate has markers to position said supporting plate in relation to an X-ray source.7. The grating-detector configuration according to claim 5 , wherein said supporting plate is connected to said trolley.8. An X-ray system claim 5 , comprising:a mobile grating-detector configuration having an X-ray ...

MONOCHROMATOR WITH STRAY LIGHT REDUCTION

A stray light reducing apparatus includes a light source and an entrance slit positioned to pass through light from the light source. A first monochromator mirror is positioned to reflect light passed through the entrance slit. A diffractive surface is positioned to receive and diffract light reflected by the first monochromator mirror. A second monochromator mirror is positioned to reflect light diffracted by the diffractive surface. An exit slit is positioned to pass through light reflected by the second monochromator mirror. A cuvette is positioned to pass through light passed through the exit slit. A long-pass interference filter is positioned to receive light from the light source, reflect light that has a wavelength below a selected value, and pass through light having a wavelength above the selected value. A first sample detector is positioned to receive light reflected by the long-pass interference filter. 1. A monochromator comprising:a light source;an entrance slit positioned to pass through light from the light source;a first monochromator mirror positioned to reflect light passed through the entrance slit;a diffractive surface positioned to receive and diffract light reflected by the first monochromator mirror;a second monochromator mirror positioned to reflect light diffracted by the diffractive surface;an exit slit positioned to pass through light reflected by the second monochromator mirror;a cuvette positioned to pass through light passed through the exit slit;a long-pass interference filter positioned to receive light from the light source, reflect light that has a wavelength below a selected value, and pass through light having a wavelength above the selected value; anda first sample detector positioned to receive light reflected by the long-pass interference filter.2. The monochromator of claim 1 , further comprising a source mirror positioned to reflect light from the light source toward the entrance slit.3. The monochromator of claim 1 , further ...

SOLID INSPECTION APPARATUS AND METHOD OF USE

An inspection apparatus is provided that comprises an optical target including a solid host material and a fluorescing material embedded in the solid host material. The solid host material has a predetermined phonon energy HOST. The fluorescing material exhibits a select ground energy level and a target excitation (TE) energy level separated from the ground energy level by a first energy gap corresponding to a fluorescence emission wavelength of interest. The fluorescing material has a next lower lying (NLL) energy level relative to the TE energy level. The NLL energy level is spaced a second energy gap FMbelow the TE energy level, wherein a ratio of the FM/HOSTis three or more. 1. An optical detection device , comprising:an optical target including a solid body that encloses a fluorescing material and a grating layer;an objective to direct excitation light toward the optical target and to receive fluorescence emission from the optical target;a driver to move the objective to a region of interest proximate to the optical target;memory to store program instructions; anda processor to execute the program instructions for detecting fluorescence emission from the optical target in connection with at least one of optical alignment or calibration of an instrument;{'sub': PE', 'EG2', 'EG2', 'PE, 'wherein the optical target includes a solid host material and the fluorescing material embedded in the solid host material, the solid host material having a predetermined phonon energy HOST, the fluorescing material exhibiting a select ground energy level, a target excitation (TE) energy level, and a next lower lying (NLL) energy level spaced an energy gap FMbelow the TE energy level, wherein a ratio of the FM/HOSTis three or more.'}2. The device of claim 1 , wherein the objective directs excitation light onto the optical target claim 1 , the processor is to derive reference information from the fluorescence emission claim 1 , the processor is to utilize the reference information ...

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 ...

LIGHT WAVELENGTH MEASUREMENT METHOD AND LIGHT WAVELENGTH MEASUREMENT APPARATUS

A light wavelength measurement method of measuring a wavelength of target light includes: receiving target light on a second dispersion device that disperses the target light into a plurality of second beams which reach a plurality of positions corresponding to the wavelength of the target light; and measuring the wavelength of the target light, by using the plurality of the second beams as a vernier scale for measuring the wavelength of the target light within a wavelength range specified by a main scale. 1. A spectrum measurement method of measuring a spectrum of input light , the spectrum measurement method comprising:receiving the input light on a dispersion device that separates the input light into a plurality of beams having a predetermined interval, and disperses each of the plurality of beams;causing the plurality of beams output from the dispersion device to overlap a main-scale device having graduations, wherein an interval of the graduations is different from the predetermined interval; andmeasuring the spectrum of the input light by measuring, using a measurement device arranged separately from the main-scale device, an intensity distribution of light obtained by causing the plurality of beams to overlap the main-scale device.2. A spectrum measurement apparatus that measures a spectrum of input light , the spectrum measurement apparatus comprising:a dispersion device that separates the input light into a plurality of beams having a predetermined interval, and disperses each of the plurality of beams, wherein the plurality of beams output from the dispersion device is caused to overlap a main-scale device having graduations, and an interval of the graduations is different from the predetermined interval; anda measurement device that is arranged separately from the main-scale device, and measures the spectrum of the input light by measuring an intensity distribution of light obtained by causing the plurality of beams to overlap the main-scale device. The ...

Optical Arrangement for a Spectral Analysis System, Method for its Production, and Spectral Analysis System

An optical arrangement for a spectral analysis system, a method for producing an optical arrangement for a spectral analysis system and a spectral analysis system are disclosed. In an embodiment the optical arrangement includes a carrier substrate having a placement area for a frame and a base area, and a diffraction grating movably arranged in the frame, wherein the frame is arranged on the placement area in an inclined placement position with respect to the base area so that the diffraction grating, arranged in a base position, is inclined with respect to the base area. 1. An optical arrangement for a spectral analysis system comprising: a placement area for a frame; and', 'a base area; and, 'a carrier substrate comprisinga diffraction grating movably arranged in the frame, wherein the frame is arranged on the placement area in an inclined placement position with respect to the base area so that the diffraction grating, arranged in a base position, is inclined with respect to the base area.2. The optical arrangement according to claim 1 , wherein the placement area comprises a protrusion in the carrier substrate claim 1 , and wherein a diffraction-grating-facing surface of the carrier substrate outside the protrusion is planar and parallel with respect to the base area.3. The optical arrangement according to claim 2 , wherein the protrusion is prism-shaped.4. The optical arrangement according to claim 1 , wherein the diffraction grating and the frame are integrated in a component substrate that is arranged on the carrier substrate.5. The optical arrangement according to claim 4 , wherein the frame is tiltable with respect to a main plane of the component substrate about a first axis.6. The optical arrangement according to claim 5 , wherein the diffraction grating is tiltable with respect to a main plane of the frame about a second axis.7. The optical arrangement according to claim 6 , wherein the first and the second axis are collinear or identical.8. The optical ...

Light modulating device and spectral detection system

A light modulating device includes a dispersion assembly and a lens assembly, the dispersion assembly is configured to disperse light emitting from a light source into dispersed light which at least includes collimated monochromatic light and non-collimated monochromatic light; the lens assembly includes: at least a first lens component; at least a second lens component disposed in a one-to-one correspondence with the first lens component; a first absorbing layer disposed between the first lens component and the second lens component, the first absorbing layer has an opening, a focus point of the first lens component towards the first absorbing layer coincides with a focus point of the second lens component towards the first absorbing layer, the opening is disposed at the coincident focus point of the first lens component and the second lens component.

CUBESAT INFRARED ATMOSPHERIC SOUNDER (CIRAS)

A CubeSat compatible spectrometer including a slit having a first length and first width; a diffraction grating; and a two dimensional focal plane array electromagnetically coupled to the diffraction grating. The 2D focal plane array includes an array of pixels including a plurality of sets of pixels. Diffraction of electromagnetic radiation transmitted through the slit by the diffraction grating forms a plurality of beams, each of the beams comprising a different one of the bands of the wavelengths in the electromagnetic radiation, and each of the beams transmitted onto a different one of the sets of the pixels. 1. A spectrometer , comprising:a slit having a first length and first width;a diffraction grating;a two dimensional (2D) focal plane array electromagnetically coupled to the diffraction grating, the 2D focal plane array comprising an array of pixels including a plurality of groups of the pixels, each of the groups having a second width in a first direction and a second length in a second direction, wherein the second length of the groups of pixels is aligned with and parallel to the first length of the slit; and the slit transmits electromagnetic radiation received on the slit, the electromagnetic radiation comprising a plurality of bands of wavelengths,', 'the diffraction grating diffracts the electromagnetic radiation transmitted through the slit into a plurality of beams,', 'each of the beams comprise a portion of the electromagnetic radiation comprising a different one of the bands of the wavelengths, and', 'each of the beams are transmitted onto a different one of the groups of the pixels (or channels)., 'wherein2. The spectrometer of claim 1 , wherein the diffracting grating comprises an immersion grating.3. The spectrometer of claim 1 , wherein:the bands of wavelengths include a first band comprising a first range of infrared wavelengths divided into a first plurality of channels and a second band comprising a second range of infrared wavelengths ...

Curved Grating Spectrometer and Wavelength Multiplexer or Demultiplexer with Very High Wavelength Resolution

The present application discloses a system comprising a compact curved grating (CCG) and its associated compact curved grating spectrometer (COGS) or compact curved grating wavelength multiplexer/demultiplexer (WMDM) module and a method for making the same. The system is capable of achieving a very small (resolution vs. size) RS factor. The location of the entrance slit and detector can be adjusted in order to have the best performance for a particular design goal. The initial groove spacing is calculated using a prescribed formula dependent on operation wavelength. The location of the grooves is calculated based on two conditions. The first one being that the path-difference between adjacent grooves should be an integral multiple of the wavelength in the medium to achieve aberration-free grating focusing at the detector or a first anchor output slit even with large beam diffraction angle from the entrance slit or input slit, the second one being specific for a particular design goal of a curved-grating spectrometer. 117.-. (canceled)20. The wavelength multiplexer/demultiplexer/spectrometer as recited in claim 19 , wherein one or both of the two anchor output slits are not physically present claim 19 , and are only used for the purpose of generating the grating teeth.21. A second device wavelength multiplexer/demultiplexer/spectrometer with a grating that is basically the same design as recited in claim 19 , wherein two gratings are the same design if a set of grooves involved in reflecting more than 50% of the total power reflected by the grating towards the same output slit location has each of its groove's δS satisfying δS<λ/(n) claim 19 , where δS=(δx+δy)with δx being the spatial deviation of grating groove position in the second device from the designed position of in the x-coordinate and δy being the spatial deviation of grating groove position in the second device from the designed position of in the y-coordinate.24. The wavelength multiplexer/demultiplexer/ ...

GAS IMAGER EMPLOYING AN ARRAY IMAGER PIXELS WITH ORDER FILTERS

A spectral radiation gas detector has at least one lenslet with a circular blazed grating for diffraction of radiation to a focal plane. A detector is located at the focal plane receiving radiation passing through the at least one lenslet for detection at a predetermined diffraction order. A plurality of order filters are associated with the at least one lenslet to pass radiation at wavelengths corresponding to the predetermined diffraction order, each filter blocking a selected set of higher orders. A controller is adapted to compare intensity at pixels in the detector associated with each of the plurality of order filters and further adapted to determine a change in intensity exceeding a threshold. 1. A method for gas detection comprising:monitoring output of a focal plane array (FPA) receiving radiation from at least one lenslet with a plurality of order filters associated with the at least one lenslet to pass radiation at wavelengths corresponding to the predetermined diffraction order, each filter blocking a selected set of higher orders;measuring intensity at pixels in the FPA associated with each of the plurality of order filters;calculating true intensity for each diffraction order;determining slope between the true intensity of each diffraction order; and,activating an alarm if any slope exceeds a predetermined threshold.2. The method as defined in wherein the plurality of order filters is four order filters claim 1 , each order filter associated with one of four selected higher orders and the step of measuring intensity comprises:{'b': 1', '10', '11', '12', '13, 'measuring intensity at pixels associated with I equals the sum of all four selected higher orders, m, m, m and m;'}{'b': 2', '10', '11', '12, 'measuring intensity at pixels associated with I equals the sum of a first three of the selected higher orders, m, m, m;'}{'b': 2', '10', '11, 'measuring intensity at pixels associated with I equals a sum of a first and second of the selected higher orders, ...

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.

Data knitting tandem dispersive range monochromator

Aspects of a tandem dispersive range monochromator and data knitting for the monochromator are described herein. In one embodiment, the monochromator includes a tandem diffraction grating, a grating drive motor that rotates the tandem diffraction grating to provide, by diffraction of broadband light, first dispersed wavelengths of light and second dispersed wavelengths of light, a detector that detects a first reflection from the first dispersed wavelengths of light and a second reflection from the second dispersed wavelengths of light, and processing circuitry that knits together data values from the first reflection and data values from the second reflection to provide a spectrum of combined data values. By using a tandem diffraction grating having different dispersive surfaces, measurements of relatively high precision and quality may be taken throughout a wider spectral range, and the measurements may be knitted together to provide a spectrum of combined data values.

Bragg grating, and spectroscopy device including the bragg grating

Provided are a Bragg grating and a spectroscopy device including the same. The Bragg grating is disposed at each of opposite ends of a resonator for reflecting light of a certain wavelength band and includes a core member extending from a waveguide of the resonator in a lengthwise direction of the waveguide; a plurality of first refractive members protruding from the core member and spaced apart from each other along the lengthwise direction; and a second refractive member filling spaces between the first refractive members and having a refractive index different from a refractive index of the first refractive members.

Spectroscope

A spectrometer 1 A includes a package 2 having a stem 4 and a cap 5 , an optical unit 10 A disposed on the stem 4 , and a lead pin 3 for securing the optical unit 10 A to the stem 4 . The optical unit 10 A includes a dispersive part 21 for dispersing and reflecting light entering from a light entrance part 6 of the cap 5 , a light detection element 30 having a light detection part 31 for detecting the light dispersed and reflected by the dispersive part 21 , a support 40 for supporting the light detection element 30 such that a space is formed between the dispersive part 21 and the light detection element 30 , and a projection 11 protruding from the support 40 , the lead pin 3 being secured to the projection 11 . The optical unit 10 A is movable with respect to the stem 4 in a contact part of the optical unit 10 A and the stem 4.

MONOCHROMATOR

A monochromator includes: a diffraction grating placed within a housing so as to receive light from an entrance and disperse the light into a spectrum from which a component of light having a set wavelength is to be extracted through an exit ; an optical filter to be removably inserted between the grating and the exit to remove light within a specific wavelength band which is out of the set wavelength; a rotary drive for rotating the grating using a stepping motor; a wavelength-movement information setter which sets wavelength-movement information to be used for rotating the grating from an original position to a rotational position corresponding to the set wavelength; and a wavelength-movement controller which controls the rotary drive to initially rotate the grating to the original position and subsequently rotate it to the aforementioned rotational position based on the wavelength-movement information. 1. A monochromator , comprising:a housing with an entrance and an exit;a diffraction grating placed within the housing so as to receive incident light from the entrance and disperse the incident light into a spectrum of light from which a component of light having a set wavelength is to be extracted through the exit;an optical filter configured to be removably inserted into an optical path extending from the diffraction grating to the exit, and remove light within a specific wavelength band which is out of the set wavelength;a rotary drive mechanism configured to rotate the diffraction grating, using a stepping motor as a drive source;a wavelength-movement information setter configured to set wavelength-movement information which is a kind of information to be used for rotating the diffraction grating from a predetermined original position to a rotational position corresponding to the set wavelength; anda wavelength-movement controller configured to control the rotary drive mechanism so as to perform a wavelength-movement operation which includes rotating the ...

OPTICAL EMISSION SPECTROMETER WITH CASCADED CHARGE STORAGE DEVICES

An optical emission spectrometer has an excitation device for a sample to be examined, a dispersive element for spectrally decomposing light emitted by an excited sample, a multiplicity of photodiodes, which are arranged such that different spectral components of the emitted, decomposed light are detectable with different photodiodes, and a multiplicity of electronic readout systems for the photodiodes. A respective electronic readout system has a charge storage assembly comprising a plurality of individual charge storage devices, wherein the charge storage devices are interconnectable in cascading fashion, with the result that charges flowing in from an associated photodiode successively fill the charge storage devices. The respective electronic readout system can be used to read the charges of the individual charge storage devices of the charge storage assembly and/or the charges of subsets of the charge storage devices of the charge storage assembly. 1. An optical emission spectrometer comprising:an excitation device for a sample to be examined;a dispersive element for spectrally decomposing light emitted by an excited sample;{'b': 1', '1', '1', '1', '1, 'sub': i', 'i', 'i', 'i, 'a multiplicity of photodiodes (P-Pn, P-Pn), which are arranged such that different spectral components (S-Sn) of the emitted, decomposed light are detectable with different photodiodes (P-Pn, P-Pn); and'}{'b': 1', '1, 'sub': i', 'i, 'a multiplicity of electronic readout systems for the photodiodes (P-Pn, P-Pn),'}{'b': 1', '1, 'sub': i', 'i, 'wherein a respective electronic readout system has a charge storage assembly comprising a plurality of individual charge storage devices that are interconnectable in cascading fashion, with the result that charges flowing in from an associated photodiode (P-Pn, P-Pn) successively fill the charge storage devices, and wherein the respective electronic readout system can be used to read the charges of the individual charge storage devices of the charge ...

TANDEM DISPERSIVE RANGE MONOCHROMATOR

Aspects of a tandem dispersive range monochromator are described herein. In one embodiment, the monochromator includes a light source that provides broadband light, a tandem diffraction grating including a first diffraction grating and a second diffraction grating, a grating drive motor that rotates the tandem diffraction grating to provide dispersed wavelengths of light, a detector that detects a portion of the dispersed wavelengths of light, and processing circuitry that controls a grating drive motor to regulate an angular velocity of the tandem grating based on an angular orientation of the tandem diffraction grating. By using a tandem diffraction grating having different dispersive surfaces, measurements of relatively high precision and quality may be taken throughout a wider spectral range. In another aspect, the processing circuitry controls a sample drive motor to vary an angle of incidence of the dispersed wavelengths of light onto a sample for evaluation. 1. A monochromator , comprising:a light source that provides broadband light;a tandem diffraction grating including a first diffraction grating, a second diffraction grating, and a mounting assembly having a rotatable shaft to rotate the tandem diffraction grating;a grating drive motor that rotates the tandem diffraction grating about a pivot point of the rotatable shaft to provide dispersed wavelengths of light by diffraction of the broadband light;an exit slit that passes at least a portion of the dispersed wavelengths of light onto a sample tray that holds a sample for evaluation;a detector that detects a reflection of the portion of the dispersed wavelengths of light off the sample; andprocessing circuitry that controls the grating drive motor to regulate an angular velocity of the tandem diffraction grating based on an angular orientation of the tandem diffraction grating.2. The monochromator of claim 1 , wherein:the first diffraction grating includes a first periodic surface structure for a first ...

System and method for selective resolution for concave grating spectrometer

An optical system includes a spectrograph having a concave diffraction grating and a detector. An aperture is selectively positioned by an associated actuator or positioning mechanism either into, or out of, an optical path of the input light beam downstream of a sample and prior to entering the spectrograph. A slit plate having a plurality of different size entrance slits is positioned downstream of the aperture and movable by an associated actuator or positioning mechanism to position one of the plurality of entrance slits in the optical path of the input light beam. A controller coupled to the detector and the actuators is configured to control the actuators to selectively position the aperture and the slit plate to provide a selectable resolution of the spectrograph. The aperture setting and slit plate setting may be determined from a lookup table in response to a request for finer or coarser spectral resolution.

COMPACT SPECTROSCOPIC OPTICAL INSTRUMENT

An optical instrument for spectroscopy applications includes a compact arrangement having a three-dimensional folded optical path. A plate configured as an optical reference plane is secured to a housing and is configured to secure optical components above or below the plate. A modular light source module may be secured within the housing without fasteners. A monochromator and spectrometer are secured below the plate. Mirrors disposed above the plate are configured to direct light from the monochromator passing through a first opening in the plate through a sample disposed above the plate, and to direct light from the sample through a second opening in the plate to the spectrometer. A controller is configured for communication with the monochromator and the spectrometer. The controller may control an entrance slit actuator for the spectrometer and positioning of an aperture upstream of the spectrometer to adjust resolution and throughput. 1. An optical instrument , comprising:a housing;a plate disposed within the housing and configured to secure optical components to either a top surface or a bottom surface of the plate;a light source;a detector;at least one mirror secured to the plate and configured to direct light passing through at least one opening in the plate from the light source to a sample, and to direct light from the sample through the at least one opening in the plate to the detector; anda controller configured to communicate with the light source and the detector.2. The optical instrument of further comprising a monochromator claim 1 , wherein the at least one mirror comprises:a first mirror secured to the bottom surface of the plate and configured to direct light from the light source to an input of the monochromator; anda second mirror secured to the bottom surface of the plate and configured to direct light from an output of the monochromator through the at least one opening in the plate to one of the at least one mirror, the at least one mirror ...

SOLID INSPECTION APPARATUS AND METHOD OF USE

An inspection apparatus is provided that comprises an optical target including a solid host material and a fluorescing material embedded in the solid host material. The solid host material has a predetermined phonon energy HOST. The fluorescing material exhibits a select ground energy level and a target excitation (TE) energy level separated from the ground energy level by a first energy gap corresponding to a fluorescence emission wavelength of interest. The fluorescing material has a next lower lying (NLL) energy level relative to the TE energy level. The NLL energy level is spaced a second energy gap FMbelow the TE energy level, wherein a ratio of the FM/HOSTis three or more. 1. An optical detection device , comprising:an optical target including a solid body that encloses a fluorescing material;an objective to direct excitation light toward the optical target and to receive fluorescence emission from the optical target;a driver to move the objective to a region of interest proximate to the optical target;memory to store program instructions; anda processor to execute the program instructions for detecting fluorescence emission from the optical target in connection with at least one of optical alignment or calibration of an instrument.2. The device of claim 1 , wherein the objective directs excitation light onto the optical target claim 1 , the processor is to derive reference information from the fluorescence emission claim 1 , the processor is to utilize the reference information in connection with the at least one of optical alignment or calibration of the instrument.3. The device of claim 1 , wherein the optical target is permanently mounted at a calibration location proximate to the objective claim 1 , the calibration location being separate from flow cell channels within the instrument.4. The device of claim 1 , wherein the optical target includes a solid host material and the fluorescing material embedded in the solid host material claim 1 , the solid host ...

Systems and methods using multi-wavelength single-pulse raman spectroscopy

The invention provides methods and apparatus comprising a multi-wavelength laser source that uses a single unfocused pulse of a low intensity but high power laser over a large sample area to collect Raman scattered collimated light, which is then Rayleigh filtered and focused using a singlet lens into a stacked fiber bundle connected to a customized spectrograph, which separates the individual spectra from the scattered wavelengths using a hybrid diffraction grating for collection onto spectra-specific sections of an array photodetector to measure spectral intensity and thereby identify one or more compounds in the sample.

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. 1. An optical filter array comprising:a plurality of optical filters including a first optical filter and a second optical filter,wherein each of the first optical filter and the second optical filter comprises:a first reflector comprising a plurality of first non-metallic gratings and a first material covering the plurality of first non-metallic gratings and having a lower refractive index than a refractive index of the plurality of first non-metallic gratings, the first non-metallic gratings having a first sub-wavelength dimension and being arranged to recur at a first constant interval in a first direction; anda second reflector stacked on and spaced apart from the first reflector, the second reflector comprising a plurality of second non-metallic gratings and a second material covering the plurality of second non-metallic gratings having a lower refractive index than a refractive index of the plurality of second non-metallic gratings, and the plurality of second non-metallic gratings having a second sub-wavelength dimension and being arranged to recur at a second constant interval in a second direction parallel to the first direction,wherein the first reflector and the second reflector have at least one of different materials and different geometric structures ...

OPTICAL SENSOR

Disclosed is an optical sensor, including an external cavity laser configured to output sensing light and reference light; and a photodetector configured to detect a beating signal by an interference of the sensing light and the reference light output from the external cavity laser, in which the external cavity laser includes a reflecting filter including a sensing grating, to which a sensing object is attachable, and a reference grating, which is disposed on the same plane as that of the sensing grating, and outputs sensing light reflected from the sensing grating and reference light reflected from the reference grating. Accordingly, the optical sensor does not require a high-resolution spectroscope and has improved resolution and sensitivity. 1. An optical sensor , comprising:an external cavity laser configured to output sensing light and reference light; anda photodetector configured to detect a beating signal by an interference of the sensing light and the reference light output from the external cavity laser,wherein the external cavity laser includes a reflecting filter including a sensing grating, to which a sensing object is attachable, and a reference grating, which is disposed on the same plane as that of the sensing grating, and outputs sensing light reflected from the sensing grating and reference light reflected from the reference grating.2. The optical sensor of claim 1 , wherein each of the sensing grating and the reference grating reflects light at a resonant wavelength.3. The optical sensor of claim 1 , wherein each of sensing grating and the reference grating includes a core layer claim 1 , and a grating layer laminated on the core layer claim 1 ,the sensing grating and the reference grating have the same grating characteristic, andthe grating characteristic includes at least one of a grating period, a thickness of a grating layer, and a thickness of a core layer.4. The optical sensor of claim 1 , wherein the external cavity laser further includes ...

Interlaced Diffractive Grating

An interlaced diffraction grating system and process are disclosed. The interlaced grating system includes an optical dispersive grating with alternating bands of unique grating densities wherein the number of unique grating densities is greater than or equal to two. The optical dispersive grating may be reflective or transmissive, and it may be fabricated by mechanical ruling, holography, or reactive ion etching of a binary mask. An interlaced grating allows additional utility for both point spectroscopic detection as well as hyperspectral imaging. 1. An interlaced optical grating comprising:alternating bands of at least a first grating band and a second grating band;wherein the at least first and second grating bands have unique grating densities.2. The interlaced optical grating of claim 1 , wherein the interlaced optical grating is reflective.3. The interlaced optical grating of claim 1 , wherein the interlaced optical grating is transmissive.4. A line-scan hyperspectral imaging system comprising:a first lens;a slit;a collimating lens;an interlaced optical grating;a second lens; anda 2-dimensional detector array;wherein the first lens is configured to collect light from a scene and focus onto the slit, the collimating lens is configured to collimate the light from the slit onto the interlaced optical grating, and the second lens is configured to focus the light dispersed by the interlaced optical grating onto the 2-dimensional detector array;wherein the interlaced optical grating comprises alternating bands of at least a first grating band and second grating band, and the at least first and second grating bands have unique grating densities.5. The line-scan hyperspectral imaging system of claim 4 , further comprising a processor configured to:extract optical spectra data from the 2-dimensional detector array corresponding to the bands of the interlaced optical grating; andconcatenate N neighboring spectral bands to form N−1 spectra.6. A point detection ...

SPECTRAL RESOLUTION ENHANCEMENT DEVICE

A spectral resolution enhancement device including a preliminary dispersion unit, a two-grating angular dispersion amplification unit, and a detection unit is provided. The preliminary dispersion unit is configured to receive collimated incident light and emits light of different wavelengths in the incident light at different angles. The two-grating angular dispersion amplification unit is configured to diffract the light of different wavelengths and emitted from the preliminary dispersion unit multiple times, such that angular dispersion the light of different wavelengths is enhanced, and emergent angle deviations between the light of different wavelengths are increased. The detection unit is configured to detect light of different wavelengths and emitted from the two-grating angular dispersion amplification unit. Since the emergent angle deviations of light of different wavelengths are increased, resolution of the detection unit for the light of different wavelengths is increased.

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.

METHOD AND APPARATUS FOR FEMTOSECOND LASER PULSE MEASUREMENT BASED ON TRANSIENT-GRATING EFFECT

Apparatuses and method for real-time measuring ultrashort pulse shape and pulse width. Transient-grating effect on a transparent optical medium is used to generate a reference beam. A black plate with four equal-sized holes divides the incoming laser beam into four beams, one of which is attenuated and introduced an appropriate time delay relative to the other three. The four laser beams pass through a concave mirror and are focused onto a nonlinear transparent optical medium. The three beams without attenuation are used to generate a transient-grating light in the transparent medium. The transient-grating light is collinear and overlapped with the fourth attenuated beam. According to the third-order nonlinear effect, the transient-grating light has a broader spectral bandwidth and more smooth spectrum phase with respect to the incident laser. By measuring the spectral interference, the spectrum and spectral phase may be retrieved by spectral interferometry. 1. An apparatus for measuring femtosecond laser pulse , comprisinga plate having four equal-sized holes and being positioned on an optical pathway to receive incoming laser to be measured,a plane reflective mirror being positioned on the optical pathway behind the plate and having a first, a second, a third, and a fourth quadrants,a delay plate being positioned on the optical pathway behind one of the four equal-sized holes of the plate and between the hole and the fourth quadrant of the plane reflective mirror,a first concave reflective mirror being positioned on an optical pathway of reflected beams by the plane reflective mirror and having a focal point,a third-order nonlinear optical medium being positioned on the focal point of the first concave reflective mirror,an iris being positioned on an optical pathway of beams after passing through the third-order nonlinear optical medium,a second concave reflective mirror being positioned behind the iris on the optical pathway of beams, anda spectrometer being ...

APPARATUSES, SYSTEMS, AND METHODS FOR DETECTING MATERIALS BASED ON RAMAN SPECTROSCOPY

Apparatuses, systems, and methods for Raman spectroscopy are described. In certain implementations, a spectrometer is provided. The spectrometer may include a plurality of optical elements, comprising an entrance aperture, a collimating element, a volume phase holographic grating, a focusing element, and a detector array. The plurality of optical elements are configured to transfer the light beam from the entrance aperture to the detector array with a high transfer efficiency over a preselected spectral band. 1. A spectrometer comprising: the entrance aperture is configured to receive a light beam;', 'the collimating element is configured to direct the light beam to the volume phase holographic grating;', 'the volume phase holographic grating is configured to disperse the light beam over a preselected spectral band of at least 50 nm;', 'the focusing element is configured to focus the dispersed light beam to the detector array; and', 'the plurality of optical elements are configured to transfer the light beam from the entrance aperture to the detector array with an average transfer efficiency from 60% to 98% for first order diffraction over the preselected spectral band of at least 50 nm., 'a plurality of optical elements, comprising an entrance aperture, a collimating element, a volume phase holographic grating, a focusing element, and a detector array; wherein'}2. The spectrometer of claim 1 , wherein the plurality of optical elements are further configured to detect the dispersed light beam at the detector array with a spectral resolution from 0.1 cmto 2.5 cmover the preselected spectral band of at least 50 nm.3. The spectrometer of claim 1 , wherein the plurality of optical elements are configured to provide a performance ratio from 3%·cmto 12.3%·cmin the preselected spectral band claim 1 , the performance ratio being a ratio between a transfer efficiency and a path length of the light beam traveled from the focusing element to the detector array.4. The ...

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.

BRAGG GRATING, AND SPECTROSCOPY DEVICE INCLUDING THE BRAGG GRATING

Provided are a Bragg grating and a spectroscopy device including the same. The Bragg grating is disposed at each of opposite ends of a resonator for reflecting light of a certain wavelength band and includes a core member extending from a waveguide of the resonator in a lengthwise direction of the waveguide; a plurality of first refractive members protruding from the core member and spaced apart from each other along the lengthwise direction; and a second refractive member filling spaces between the first refractive members and having a refractive index different from a refractive index of the first refractive members. 1. A Bragg grating disposed at each of opposite ends of a resonator for reflecting light of a certain wavelength band , the Bragg grating comprising:a core member extending from a waveguide of the resonator in a lengthwise direction of the waveguide;a plurality of first refractive members protruding from the core member; anda second refractive member filling spaces between the first refractive members,wherein pitches between the plurality of first refractive members vary along the lengthwise direction, andwherein at least one of a width of the core member and protruding lengths of the first refractive members varies along the lengthwise direction.2. The Bragg grating of claim 1 , wherein the plurality of first refractive members protrude from opposite sides of the core member in a width direction of the core member.3. The Bragg grating of claim 2 , wherein a width of the core member gradually reduces along the lengthwise direction of the core member toward a center portion of the core member claim 2 , and protruding lengths of the plurality of first refractive members gradually increase along the lengthwise direction toward the center portion of the core member. This is a divisional application of U.S. application Ser. No. 15/208,953 filed on Jul. 13, 2016, which claims priority from Korean Patent Application No. 10-2015-0166416, filed on Nov. 26, ...

DATA KNITTING TANDEM DISPERSIVE RANGE MONOCHROMATOR

Aspects of a tandem dispersive range monochromator and data knitting for the monochromator are described herein. In one embodiment, the monochromator includes a tandem diffraction grating, a grating drive motor that rotates the tandem diffraction grating to provide, by diffraction of broadband light, first dispersed wavelengths of light and second dispersed wavelengths of light, a detector that detects a first reflection from the first dispersed wavelengths of light and a second reflection from the second dispersed wavelengths of light, and processing circuitry that knits together data values from the first reflection and data values from the second reflection to provide a spectrum of combined data values. By using a tandem diffraction grating having different dispersive surfaces, measurements of relatively high precision and quality may be taken throughout a wider spectral range, and the measurements may be knitted together to provide a spectrum of combined data values. 1. A monochromator , comprising:a diffraction grating;a grating drive motor that rotates the diffraction grating to provide, by diffraction of light, first dispersed wavelengths of light and second dispersed wavelengths of light from the diffraction grating;a detector configured to detect first data values for a first reflection of the first dispersed wavelengths of light and second data values for a second reflection of the second dispersed wavelengths of light, wherein at least a portion of the first data values overlap in an overlapping area of wavelength with at least a portion of the second data values; andprocessing circuitry configured to identify at least one of a difference in absorbance or a difference in wavelength between the first data values for the first reflection and the second data values for the second reflection.2. The monochromator of claim 1 , wherein the processing circuitry is further configured to reduce at least one of the difference in absorbance or the difference in ...

MANUFACTURING METHOD OF CONCAVE DIFFRACTION GRATING, CONCAVE DIFFRACTION GRATING, AND ANALYZER USING THE SAME

Easy and accurate mating of a groove interval of a groove pattern of a diffraction grating with a position on a convex fixing substrate is enabled. For this purpose, a concave diffraction grating is fabricated by: transferring a groove pattern formed on a plane diffraction grating and having unequal groove intervals onto a metal thin film; forming a first alignment mark on a convex surface of a fixing substrate having the convex surface to fix the metal thin film; mating a second alignment mark formed on an adhesive surface of the metal thin film with the first alignment mark to perform alignment; bonding the adhesive surface of the metal thin film and the convex surface of the fixing substrate to each other to fabricate a master; and transferring a groove pattern of a metal thin film of the master. 15. A manufacturing method of a concave diffraction grating , comprising the steps of:transferring a groove pattern formed on a plane diffraction grating and having an unequal groove interval onto a metal thin film;forming a first alignment mark on a convex surface of a fixing substrate having the convex surface to fix the metal thin film;mating a second alignment mark formed on an adhesive surface of the metal thin film with the first alignment mark to perform alignment and bonding the adhesive surface of the metal thin film and the convex surface of the fixing substrate to each other to fabricate a master; andtransferring a groove pattern of the metal thin film of the master to fabricate a concave diffraction grating.16. The manufacturing method of the concave diffraction grating according to claim 15 , comprising the steps of:transferring a groove pattern of the concave diffraction grating to fabricate a convex diffraction grating; andtransferring a groove pattern of the convex diffraction grating to further fabricate a concave diffraction grating.17. The manufacturing method of the concave diffraction grating according to claim 15 , comprising a step of:forming a ...

Measuring apparatus

According to one embodiment, there is provided a measuring apparatus including a measurement section and a control section. The measurement section is configured to acquire a response from a sample. The control section is configured to compare a loading obtained by performing principal component analysis in advance with a first evaluation-use loading obtained by performing principal component analysis onto the response acquired from the sample, and to generate a first reliability index for measurement using principal component analysis, in accordance with a comparison result.

METHOD OF SPECTROMETER AND SPECTROMETER

A design method of a spectrometer and a spectrometer are disclosed, including the following steps: 1) determining an incident angle of a second incident slit and a groove-shaped cycle of a concave grating; 2) estimating a blaze angle of the concave grating, determining a surface material and a groove-shaped structure of the concave grating; 3) acquiring wavelength-diffraction efficiency curves; 4) determining values of incident angles θand θand values of wavelengths λ and λ, and setting λ to equal λ; 5) acquiring a record structural parameter and a use structural parameter; 6) determining a manufacture parameter of the concave grating; 7) determining locations of the three incident slits and the three photodetectors relative to the concave grating. The spectrometer acquired by using this method has relatively high diffraction efficiency in most spectrum regions and effectively alleviates the problem of relatively low diffraction efficiency in a broad spectrum region. 1. A design method of a spectrometer , wherein a concave grating , three incident slits , and three photodetectors are used to construct a spectrometer by design , and a spectrum detection range of the spectrometer is λto λ; and the design method comprises the following steps:{'sub': 'A2', '1) according to a fixed structural parameter of the spectrometer, performing calculation based on an eikonal function series expansion method to acquire an incident angle value when there is a single incident slit and a groove-shaped cycle of the concave grating under the incident angle value, and using the acquired incident angle value as a value of an incident angle θof a second incident slit;'}2) estimating a blaze angle of the concave grating and determining a surface material and a groove-shaped structure of the concave grating;{'sub': 'A2', '3) according to a parameter of the concave grating in step 2), acquiring a wavelength-diffraction efficiency curve of the concave grating when the incident angle is the ...

SPECTROMETER AND MANUFACTURING METHOD THEREOF

A spectrometer includes an input unit for receiving an optical signal, a diffraction grating disposed on the transmission path of the optical signal for dispersing the optical signal into a plurality of spectral rays, an image sensor disposed on the transmission path of at least a portion of the spectral rays, and a waveguide device. A waveguide space is formed between the first and second reflective surfaces of the waveguide device. The optical signal is transmitted from the input unit to the diffraction grating via the waveguide space. The portion of the spectral rays is transmitted to the image sensor via the waveguide space. At least one opening is formed on the waveguide device, and is substantially parallel to the first and/or second reflective surface. A portion of the spectral rays and/or the optical signal diffuses from the opening out of the waveguide space without reaching the image sensor. 1. A spectrometer , comprising:a light input for receiving an optical signal;a diffraction grating disposed on a transmission path of the optical signal from the light input for dispersing the optical signal into a plurality of spectral rays;an image sensor disposed on a transmission path of at least a portion of the spectral rays; and a first reflective surface; and', 'a second reflective surface, wherein a waveguide space is formed between the first reflective surface and the second reflective surface, at least a portion of the optical signal is transmitted from the light input to the diffraction grating via the waveguide space, the at least a portion of the spectral rays is transmitted to the image sensor via the waveguide space;, 'a waveguide having an end thereof to face one of the light input and the image sensor, comprisingwherein at least one opening is formed on the waveguide, the at least one opening is located on at least one of the first reflective surface and the second reflective surface to be spatially communicable with the waveguide space, and a first ...

Spectrometer and Spectral Detection and Analysis Method Using the Same

A spectrometer and a spectral detection and analysis method implemented by the spectrometer. The spectrometer includes an optical device and a detection device. The optical device includes at least one light filter, each of which including at least two light filtering units, so that the optical device can emit at least two kinds of monochromatic light. The detection device includes at least one detector, each of which comprising at least two detection units facing at least two light filtering units in the corresponding light filter in a one-to-one relationship. The monochromatic light emitted from the light filtering unit is emitted along the direction perpendicular to the direction of the light emitting surface. 1. A spectrometer , comprising:an optical device configured to receive a polychromatic incident light and emit at least two kinds of monochromatic light, the optical device comprising:a first substrate comprising a transparent material and comprising a light incident surface and a light emitting surface parallel to each other, the light incident surface and the light emitting surface being provided with a light blocking layer, the light blocking layer on the light incident surface comprising at least one light incident opening, the light blocking layer on the light emitting surface comprising at least one light emitting opening, the at least one light incident opening being aligned with the at least one light emitting opening;at least one light filter, the at least one light filter corresponding to the at least one light emitting opening, wherein each light filter is in a corresponding light emitting opening, wherein each light filter comprises at least two light filtering units, and wherein a light filtering unit of the at least two light filtering units is configured to transmit light having a wavelength within a wavelength range;a detection device configured to receive the at least two kinds of monochromatic light emitted from the optical device and ...

SPECTROMETER ARRANGEMENT

The present disclosure resides in a spectrometer arrangement including a first dispersing element for spectral separation of radiation in a main dispersion direction, and a second dispersing element for spectral separation of radiation in a cross-dispersion direction, which is at an angle to the main dispersion direction, so that a two-dimensional spectrum is producible. The spectrometer arrangement also includes a collimating optics, which directs collimated radiation to the first and/or second dispersing element, a camera optics, which images a two-dimensional spectrum in an image plane, a two-dimensional detector for detecting the two-dimensional spectrum in the image plane, and an off-axis section of a rotationally symmetric, refractive element, which is arranged between the camera optics and the detector. The present disclosure resides likewise in an optical module comprising such a spectrometer arrangement. 114-. (canceled)15. A spectrometer arrangement , including:a first dispersing element for spectral separation of radiation in a main dispersion direction;a second dispersing element for spectral separation of radiation in a cross-dispersion direction, which is at an angle to the main dispersion direction, so that a two-dimensional spectrum is producible;a collimating optics, which directs collimated radiation to the first and/or second dispersing element;a camera optics, which images a two-dimensional spectrum in an image plane;a two-dimensional detector for detecting the two-dimensional spectrum in the image plane; andan off-axis section of a rotationally symmetric, refractive element, which is arranged between the camera optics and the two-dimensional detector.16. The spectrometer arrangement of claim 15 , wherein the refractive element is embodied as a biconvex lens.17. The spectrometer arrangement of claim 15 , wherein the refractive element is embodied as a spherical lens.18. The spectrometer arrangement of claim 15 , wherein at least one lens area is ...

Optical sensor

본 발명은 센싱 광 및 기준 광을 각각 출력하는 외부공진 레이저 및 상기 외부공진 레이저에서 출력된 상기 센싱 광과 상기 기준 광의 간섭에 의한 비팅 신호를 검출하는 광 검출기를 포함하고, 상기 외부공진 레이저는 센싱 대상물이 부착될 수 있는 센싱 격자 및 상기 센싱 격자와 동일 평면상에 배치되는 기준 격자를 구비한 반사 필터를 포함하여 상기 센싱 격자에서 반사된 센싱 광 및 상기 기준 격자에서 반사된 기준 광을 각각 출력하는 것을 특징으로 하는 광센서를 구현하여 고분해능의 분광기가 필요 없고 분해능 및 감도가 향상된다. The present invention includes an external resonant laser that outputs sensing light and a reference light, respectively, and a photodetector that detects a beating signal due to interference between the sensing light output from the external resonance laser and the reference light, wherein the external resonance laser is sensed A sensing grating to which an object can be attached and a reflective filter having a reference grating disposed on the same plane as the sensing grating to output the sensing light reflected from the sensing grating and the reference light reflected from the reference grating, respectively By implementing an optical sensor characterized in that, there is no need for a high-resolution spectrometer, and the resolution and sensitivity are improved.

Spectrophotometre portatif pour l'etude in situ du spectre d'absorption d'une substance.

Le spectrophotomètre portatif selon l'invention utilise en tant qu'élément dispersif un doublet (D) comportant un réseau transmissif (R) accolé à une lentille focalisatrice (L3 ) et comprend un système de détection statique optoélectronique (M, 2, p1 , ... pn ) comportant une multiplicité de plages de détection (f1 , ... fn ) située dans la zone focale image du doublet (D). Ce spectrophotomètre peut être utilisé in situ et est insensible à une atmosphère agressive ou corrosive.

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.

Optical system for simultaneous detecting calibration system and test signal in optical spectrum analyser

一种光学系统,通过光隔离的光路将光信号耦合到分立的光检测器上,以对光谱分析仪中的校准信号和测试信号一起进行检测。成对的光纤对称设在光轴任一边,供与一边的输入光纤和另一边的输出光纤准直的光学元件之用。输入光纤分别接收校准信号和测试信号,输出光纤与各检测器连接。光校准源产生处在光学系统第一级光谱范围内的第二级或以上的谱线。衍射光栅将测试信号的第一级光谱分量传送给一个检测器,将校准信号的第二级或以上的谱线从准直光学元件传送给另一检测器。对来自检测器的电信号数字化并进行处理,获得校正误差,以用于校正由光谱分析仪显示的测试信号。

Wavelength detector and optical coherence topography having the same

파장 검출기는 제1 콜리메이터, 제1 회절 격자, 제1 초점 렌즈, 파장 가변 필터 및 출사부를 포함한다. 상기 제1 회절 격자는 상기 제1 콜리메이터로부터 평행하게 출사된 제1 광을 입사각에 따른 복수의 파장들에 따라 회절시킨다. 상기 제1 초점 렌즈는 상기 제1 회절 격자로부터 출사된 상기 제1 광을 포커싱한다. 상기 파장 가변 필터는 상기 제1 초점 렌즈로부터 출사된 상기 제1 광이 포커싱되는 위치에 배치되어 제1 방향으로 이동된다. 파장 가변 필터에는 단일 슬릿이 위치하고 이를 이동함으로써 파장을 선택적으로 반사시킨다. 상기 출사부는 상기 파장 가변 필터로부터 제공된 제2 광을 출사하는 출사부를 포함한다. The wavelength detector includes a first collimator, a first diffraction grating, a first focus lens, a tunable filter, and an emitter. The first diffraction grating diffracts the first light emitted in parallel from the first collimator according to a plurality of wavelengths according to the incident angle. The first focus lens focuses the first light emitted from the first diffraction grating. The tunable filter is disposed at a position where the first light emitted from the first focus lens is focused and moved in a first direction. A single slit is located in the tunable filter to selectively reflect the wavelength by moving it. The emission unit includes an emission unit for emitting the second light provided from the wavelength variable filter.

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.

Improved multiplicative signal correction method and apparatus

Optical system for simultaneous detecting calibration system and test signal in optical spectrum analyser

一种光学系统，通过光隔离的光路将光信号耦合到分立的光检测器上，以对光谱分析仪中的校准信号和测试信号一起进行检测。成对的光纤对称设在光轴任一边，供与一边的输入光纤和另一边的输出光纤准直的光学元件之用。输入光纤分别接收校准信号和测试信号，输出光纤与各检测器连接。光校准源产生处在光学系统第一级光谱范围内的第二级或以上的谱线。衍射光栅将测试信号的第一级光谱分量传送给一个检测器，将校准信号的第二级或以上的谱线从准直光学元件传送给另一检测器。对来自检测器的电信号数字化并进行处理，获得校正误差，以用于校正由光谱分析仪显示的测试信号。

Solid Inspection Apparatus And Method Of Use

고체 호스트 물질 및 고체 호스트 물질 내에 매립된 형광성 물질을 포함하는 광학 표적을 포함하는 검사 장치가 제공된다. 고체 호스트 물질은 미리 결정된 포논 에너지 HOST PE 를 갖는다. 형광성 물질은 선택 기저 에너지 준위 및 관심 대상 형광 방출 파장에 상응하는 제1 에너지 갭만큼 기저 에너지 준위로부터 분리된 표적 여기(TE) 에너지 준위를 나타낸다. 형광성 물질은 TE 에너지 준위에 대하여 다음으로 낮게 위치한(NLL) 에너지 준위를 갖는다. NLL 에너지 준위는 TE 에너지 준위 아래에 제2 에너지 갭 FM EG2 만큼 간격을 두고, 여기서 FM EG2 /HOST PE 의 비는 3 이상이다. An inspection device is provided that includes an optical target comprising a solid host material and a fluorescent material embedded within the solid host material. The solid host material has a predetermined phonon energy HOST PE . The fluorescent material exhibits a selective base energy level and a target excitation (TE) energy level separated from the base energy level by a first energy gap corresponding to the fluorescence emission wavelength of interest. A fluorescent material has an energy level that is next lowest to the TE energy level (NLL). The NLL energy level is spaced below the TE energy level by a second energy gap FM EG2 , wherein the ratio of FM EG2 /HOST PE is 3 or greater.

Testing device and method of its use

FIELD: equipment for testing. SUBSTANCE: invention relates to testing devices. Disclosed testing device comprises optical to the world of solid base material, in which fluorescent material is introduced and which has a given phonon energy HOST PE. Fluorescent material is characterized by a certain basic energy level and a target radiative (TR) energy level separated from the main energy level by the first energy gap corresponding to the spectral range of fluorescence of interest. Fluorescent material also has an energy level, which is the next underlying level relative to the TR energy level, separated from it by the second energy gap FM EG2 , wherein ratio FM EG2 /HOST PE is three or more. EFFECT: technical result is higher accuracy of calibration, adjustment and validation of optical detector system. 9 cl, 2 tbl, 10 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 701 875 C1 (51) МПК G01N 21/64 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК G01N 21/64 (2019.05) (21)(22) Заявка: 2018145068, 11.12.2017 (24) Дата начала отсчета срока действия патента: Дата регистрации: 02.10.2019 07.01.2017 US 62/443,675 (73) Патентообладатель(и): ИЛЛЮМИНА, ИНК. (US) (45) Опубликовано: 02.10.2019 Бюл. № 28 (56) Список документов, цитированных в отчете о поиске: US 20160160276 A1, 09.06.2016. US 20110063592 A1, 17.03.2011. US 20150015893 A1, 15.01.2015. KR 1020120124227 A, 13.11.2012. EP 746865 B1, 26.03.2003. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 19.12.2018 (86) Заявка PCT: 2 7 0 1 8 7 5 R U (87) Публикация заявки PCT: WO 2018/128753 (12.07.2018) C 1 C 1 US 2017/065606 (11.12.2017) 2 7 0 1 8 7 5 Приоритет(ы): (30) Конвенционный приоритет: R U 11.12.2017 (72) Автор(ы): ЭРНИ Джон Герхардт (US), ПИНТО Джозеф Френсис (US), БОУЭН М. Шейн (US), ГРЕЙДЖ Майкл С. (US), ПИТЕРА Артур (US), ВЕНКАТЕСАН Бала Мурали К. (US), ЮАНЬ Дацзюнь А. (US) Адрес для переписки: 197101, Санкт-Петербург, а/я 128, "АРСПАТЕНТ" (54) ...

Transient spectroscopic method and apparatus for in-process analysis of molten metal

요약없음. No summary.

Optical Spectrometer of using Fiber Bragg Grating

본 발명은, 특정 파장의 광을 반사하거나 투과시키는 광섬유 브래그 격자를 광 커플러 및 광 검출기 사이에 순차적으로 배치하여, 특정 파장의 광을 순차적으로 검출하여 분석하는 광섬유 브래그 격자를 이용한 분광기에 관한 것으로, 충분한 분해능을 확보하면서도 광의 도파 경로 겹침과 무관하게 구성하고, 도파 거리를 최소화할 수 있어서, 크기를 최소화한 분광기를 제작할 수 있고, 광원 또는 간섭으로 인한 잡음을 효과적으로 제거할 수 있어서, 분해능 및 정밀도를 향상시킬 수 있다. The present invention relates to a spectroscope using an optical fiber Bragg grating that sequentially arranges an optical fiber Bragg grating for reflecting or transmitting light of a specific wavelength between an optical coupler and a photodetector and successively detects and analyzes light of a specific wavelength, It is possible to construct a spectroscope that minimizes the size and can effectively remove the noise caused by the light source or the interference, so that the resolution and the accuracy can be improved. Can be improved.

System for spectral analysis

Dazaja spectrometer

Provided is a multi-element spectrophotometer, which is characterized in that light incident on an inlet slit (300) for measurement is parallelized by a parallel light reflector (310) and moves to a reflection diffraction foot (320). The moved light is transmitted to a photo multiplier tube (PMT) sensor through an outlet slit (340) when the light moves to a PMT condensing reflector (330) depending on a rotation angle of the reflection diffraction foot (320), or the moved like is collected by a charge-coupled device (CCD) condensing reflector (410) to be transmitted to a CCD by passing through a cylinder lens (420) when the light moves to a transmission diffraction foot (400) in accordance with the rotation angle of the reflective diffraction foot (320).

PORTABLE SPECTRAL PHOTOMETER FOR SITU EXAMINATION OF THE ABSORPTION SPECTRUM OF A SUBSTANCE

System and method for spectrum tuning of broadband light sources

튜너블 스펙트럼 필터는 제1 튜너블 분산 요소, 제1 광학 요소, 초점 평면에 위치된 공간 필터링 요소, 제2 광학 요소, 및 제2 분산 요소를 포함한다. 제1 튜너블 분산 요소는 조정가능한 분산을 이용하여 스펙트럼 분산을 조명 빔에 도입한다. 제1 광학 요소는 조명 빔을 초점 평면에서 초점조정하는데, 여기서 초점 평면에서의 스펙트럼적으로 분산된 조명 빔의 스펙트럼의 분포는 제1 튜너블 분산 요소의 분산을 조정하는 것에 의해 제어가능하다. 공간 필터링 요소는 초점 평면에서의 조명 빔의 스펙트럼의 분포에 기초하여 조명 빔의 스펙트럼을 필터링한다. 제2 광학 요소는 공간 필터링 요소로부터 투과된 스펙트럼적으로 분산된 조명 빔을 수집한다. 제2 튜너블 분산 요소는 조명 빔으로부터 제1 튜너블 분산 요소에 의해 도입된 분산을 제거한다. The tunable spectral filter includes a first tunable dispersion element, a first optical element, a spatial filtering element located in a focal plane, a second optical element, and a second dispersion element. The first tunable dispersion element introduces spectral dispersion into the illumination beam using tunable dispersion. The first optical element focuses the illumination beam in a focal plane, wherein the spectral distribution of the spectrally dispersed illumination beam in the focal plane is controllable by adjusting the dispersion of the first tunable dispersion element. The spatial filtering element filters the spectrum of the illumination beam based on the distribution of the spectrum of the illumination beam in the focal plane. The second optical element collects a spectrally dispersed illumination beam transmitted from the spatial filtering element. The second tunable dispersion element removes the dispersion introduced by the first tunable dispersion element from the illumination beam.

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.

Micro spectrometer for parallel light and method of use

A spectrometer system includes an optical assembly for collimating light, a micro-ring grating assembly having a plurality of coaxially-aligned ring gratings, an aperture device defining an aperture circumscribing a target focal point, and a photon detector. An electro-optical layer of the grating assembly may be electrically connected to an energy supply to change the refractive index of the electro-optical layer. Alternately, the gratings may be electrically connected to the energy supply and energized to change the refractive index. A data recorder may record the predetermined spectral characteristic. A method of detecting a spectral characteristic of a predetermined wavelength of source light includes generating collimated light using an optical assembly, directing the collimated light onto the micro-ring grating assembly, and selectively energizing the micro-ring grating assembly to diffract the predetermined wavelength onto the target focal point, and detecting the spectral characteristic using a photon detector.

MULTISPECTRAL IMAGING DEVICE BASED ON QUANTUM MULTI-WELLS

L'invention concerne un dispositif d'imagerie multispectrale comprenant une structure à multi-puits quantiques fonctionnant sur des transitions intersousbandes par absorption d'un rayonnement à une longueur d'onde lambda comprise dans un ensemble de longueurs d'ondes auxquelles est sensible ladite structure, ladite structure comportant une matrice de pixels élémentaires de détection caractérisé en ce que la matrice est organisée en sous-ensembles de quatre pixels élémentaires de détection (Eij), un premier pixel élémentaire de détection (P ) comportant un premier réseau diffractif (R ) sensible à un premier sous-ensemble de longueurs d'onde, un second pixel élémentaire de détection (P ) comportant un second réseau diffractif (R ) sensible à un second sous-ensemble de longueurs d'onde, un troisième pixel élémentaire de détection (P ) comportant un troisième réseau diffractif (R ) sensible à un troisième sous-ensemble de longueur d'ondes, un quatrième pixel élémentaire de détection (P ) ne comportant pas de réseau diffractif sélectif en longueur d'onde, les premier, second et troisième sous-ensemble de longueurs d'onde appartenant à l'ensemble de longueurs d'onde auquel est sensible ladite structure. The invention relates to a multispectral imaging device comprising a multi-quantum well structure operating on intersubband transitions by absorption of radiation at a wavelength lambda included in a set of wavelengths to which said structure is sensitive. , said structure comprising a matrix of elementary detection pixels characterized in that the matrix is organized into subsets of four elementary detection pixels (Eij), a first elementary detection pixel (P) comprising a first diffractive grating (R) sensitive to a first subset of wavelengths, a second elementary detection pixel (P) comprising a second diffractive grating (R) sensitive to a second subset of wavelengths, a third elementary detection pixel ( P) comprising a ...

Optical device for spectrographs, spectrometers or colorimeters

The subject of the invention is composite optical collimators for spectrography, spectrometry or colorimetry. A composite optical collimator according to the invention includes, downstream of a conventional collimator, a spectrograph of the Czerny-Turner or other type, consisting of an entry slot, two juxtaposed concave mirrors of the same focal length, and a grating in the focal plane common to the two mirrors, which grating is used in conical dispersion, the said Czerny-Turner provides the object focus of the conventional collimator with a complete intermediate spectrum, the said conventional collimator reforms at its image focus a pupil which is location of superposition of the parallel monochromatic beams, which pupil is the image of the grating itself.

Patent FR2176888B1

Transient spectroscopic method and apparatus for in-process analysis of molten metal

A method and apparatus for in-process transient spectroscopic analysis of a molten metal, wherein a probe (10) containing a pulsed high-power laser (14) producing a pulsed laser beam having a substantially triangular pulse waveshape is immersed in the molten metal and irradiates a representative quantity of the molten metal. The pulsed laser beam vaporizes a portion of the molten metal to produce a plasma plume having an elemental composition representative of the elemental composition of the molten metal. Before the plasma plume reaches thermal equilibrium shortly after termination of the laser pulse, a spectroscopic detector (241) in the probe (10) detects spectral line reversals, during a short first time window. Thereafter, when the afterglow plasma is in thermal equilibrium, a second spectroscopic detector (242) also in the probe (10) performs a second short time duration spectroscopic measurement. A rangefinder (22) measures and controls the distance between the molten metal surface and the pulsed laser (14).

Reflective relay spectrometer

A reflective relay spectrometer design based on reflective optical relay systems, which is more compact in physical size and superior in spectral imaging quality than previous designs, is disclosed.

Calibration method for optical metrology

A zoned order sorting filter for a spectrometer in a semiconductor metrology system is disclosed with reduced light dispersion at the zone joints. The order sorting filter comprises optically-transparent layers deposited underneath, or on top of thin-film filter stacks of the order sorting filter zones, wherein the thicknesses of the optically-transparent layers are adjusted such that the total optical lengths traversed by light at a zone joint are substantially equal in zones adjacent the zone joint. A method for wavelength to detector array pixel location calibration of spectrometers is also disclosed, capable of accurately representing the highly localized nonlinearities of the calibration curve in the vicinity of zone joints of an order sorting filter.

Optical modulation device and spectrum detection system

本发明提供一种光调制装置以及光谱检测系统，属于光学技术领域，其可至少部分解决现有的光调制装置尺寸大的问题。本发明的一种光调制装置，包括色散单元以及透镜组件，色散单元，用于将光源发出的光分散为特定光，特定光中至少包括准直单色光和非准直单色光；透镜组件包括：至少一个第一透镜；至少一个第二透镜，第二透镜与第一透镜一一对应；位于第一透镜和第二透镜之间的吸收层，吸收层具有开口，第一透镜朝向吸收层的焦点与第二透镜朝向吸收层的焦点重合，开口位于第一透镜与第二透镜的重合的焦点处；当特定光线透射至第一透镜后，准直单色光经由开口照射至第二透镜而射出。

Optical absorption spectroscopy system including dichroic beam combiner and splitter

Optical system for high resolution spectrometer/monochromator

An optical system for use in a spectrometer or monochromator employing a mirror which reflects electromagnetic radiation from a source to converge with same in a plane. A straight grooved, varied-spaced diffraction grating receives the converging electromagnetic radiation from the mirror and produces a spectral image for capture by a detector, target or like receiver.

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.

Light-source optical system for a spectrometer for multi element analysis

A light-source optical system for a spectrometer for multi element analysis contains a plurality of monochromatic or line-emitting light sources and optical means with the aid of which it is possible to deflect light bundles from these light sources into a common beam path. Examples are described in which these optical means are formed by rotating mirror arrangements. In another example, the "optical means" are a diffraction grating. In this case, the various light sources are arranged such that the wavelength of the light emitted by each light source is directed by the diffraction grating into the common beam path.

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.

Optical filter, optical filter system, spectrometer and fabrication method of optical filter

【課題】従来技術の光透過フィルタの限界を解決する光透過フィルタを提供する。【解決手段】本発明の実施形態によれば、ナノ構造光波長透過フィルタが提供される。光学フィルタは、パターン化基板を備え、その上に高屈折率誘電体導波路が配置されてある。低屈折率誘電体層が高屈折率誘電体導波路上に配置され、その上に金属ナノ構造のアレイが配置される。光学フィルタの層は、基板のパターン化された表面によって画定された共形形状を有する。本発明はまた、光学透過フィルタと基板に固定された検出器アレイとを備える光学フィルタシステムに関する。本発明はまた、少なくとも１つの光学透過フィルタ及び／又は少なくとも１つの光学透過フィルタシステムを備える分光器であって、３００ｎｍから７９０ｎｍの間の波長を有する入射光に対して３０ｎｍ未満のスペクトル分解能を有する分光器に関する。本発明はまた、光学フィルタの製造方法、光学フィルタシステム及び分光器に関する。【選択図】図１

OPTICAL SPECTROMETER

Chambre (10) de spectromètre optique, comprenant un plateau rotatif (18) comprenant plusieurs logements pour recevoir plusieurs éléments réfléchissants (13A, 13B, 13C, 13D), le plateau rotatif (18) étant mobile afin de pouvoir déplacer en position opérationnelle l'un quelconque des éléments réfléchissants qui occuperaient lesdits logements, caractérisée en ce que le plateau rotatif (18) est équipé d'au moins un support (20) pour un élément réfléchissant comprenant des dispositifs de déplacement dudit élément réfléchissant adaptés pour le réglage de la position d'un élément réfléchissant d'une part selon au moins une rotation et d'autre part selon une translation, afin de positionner un élément réfléchissant (13) dans une configuration adaptée pour former une image sur un détecteur (47) positionné à un endroit prédéterminé par rapport à la chambre (10). An optical spectrometer chamber (10), comprising a turntable (18) comprising a plurality of housings for receiving a plurality of reflective elements (13A, 13B, 13C, 13D), the turntable (18) being movable to be operatively movable any of the reflective elements which would occupy said housings, characterized in that the turntable (18) is equipped with at least one support (20) for a reflecting element comprising displacement devices of said reflective element adapted for the adjustment of the position a reflective element on the one hand in at least one rotation and on the other hand in a translation, for positioning a reflecting element (13) in a configuration adapted to form an image on a detector (47) positioned at a location predetermined with respect to the chamber (10).

Optical system and reflective diffraction grating thereof

一种光学系统(10)包括输入部(12)、预设输出面(162)及反射型绕射光栅(14)。输入部(12)用以接收光学信号。反射型绕射光栅(14)包括数个绕射结构(144)及光栅轮廓曲面(142)。绕射结构(144)用以将光学信号分离为数个光谱分量。绕射结构(144)分别以多个光栅间距设置于光栅轮廓曲面上。至少部份的光栅间距互为不同，使得光谱分量以实质上垂直于预设输出面(162)的方式射向预设输出面(162)。通过光栅轮廓曲面(142)将光谱分量聚焦于该预设输出面(162)上。

Near infrared blood glucose monitoring system

An individualized modeling equation for predicting a patient's blood glucose values is generated as a function of non-invasive spectral scans of a body part and an analysis of blood samples from the patient, and is stored on a central computer. The central computer predicts a blood glucose value for the patient as a function of the individualized modeling equation and a non-invasive spectral scan generated by a remote spectral device. If the spectral scan falls within the range of the modeling equation, the predicted blood glucose level is output to the patient. If the spectral scan falls outside the range of the modeling equation, regeneration of the model is required, and the patient takes a number of noninvasive scans and an invasive blood glucose level determination. The computer regenerates the individualized modeling equation as a function of the set of spectral scans and corresponding blood glucose values.

Hyperspectral imaging method and apparatus

The Hyperspectral Imaging Method and Apparatus provides the means of locating materials of economic and military value and accurately determining their spatial location and extent. The identification of a material is made by comparing its surface spectral reflectance properties in a scene with a set of reference template spectra. If there is enough spectral difference between materials of interest such as, for example, camouflage and vegetation or healthy and blighted corn, a detection will be made. The determination of spatial location and extent is may by the rapid collection of spectral measurements (nominally tens of thousands per second) in the form of an image and the reference of this image with GPS position to very high accuracy. Target identification and geolocation is computed in near realtime or realtime.

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

Spectrum radiometer and spectrum photometer

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Thin-film spectroscopic sensor

There is disclosed an integrated spectrometer for chemical analysis by evanescent electromagnetic radiation absorption in a reaction volume. The spectrometer comprises a noninteractive waveguide, a substrate, an entrance grating and an exit grating, an electromagnetic radiation source, and an electromagnetic radiation sensing device. There is further disclosed a chemical sensor to determine the pressure and concentration of a chemical species in a mixture comprising an interactive waveguide, a substrate, an entrance grating and an exit grating, an electromagnetic radiation source, and an electromagnetic radiation sensing device.

Hyperspectral camera

A camera includes a first lens configured to focus incoming light onto a reflective slit assembly. The reflective slit assembly comprises an elongated strip of reflective material configured to reflect some but not all of the incoming light as return light. The first lens is configured to at least partially collimate the return light from the elongated strip of reflective material. A first mirror is configured to reflect the return light from the first lens. A second mirror is configured to reflect the return light from the first mirror. An optical element is configured to separate the return light from the first mirror as a function of wavelength. A second lens is configured to focus the return light from the optical element onto a first detector. The first detector is configured to measure intensities of the return light as a function of two dimensional position on the first detector.

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

Spectrometer

Spectral instrument using multiple non-interfering optical beam paths and elements for use therewith

A spectrometer, or a spectral instrument using multiple non-interfering optical beam paths and special optical elements. The special optical elements for use with the instrument are used for directing the optical beam and/or altering the form of the beam. The instrument has the potential, depending upon the totality of the optical components incorporated into the instrument, to be a monochromator, a spectroradiometer, a spectrophotometer and a spectral source. The spectral instrument may further be a part of the spectral system. The system may include the spectral instrument, a power module and means for remote control of the instrument. Such remote control may be by use of a personal computer or a control system dedicated to the control, measurement and analysis of the collected information. The multiple non-interfering beam paths are created using specially designed optical elements such as a diffraction grating, a splitter box, a zero back-lash drive system for movement of the grating element. The orientation of and a physical/spatial relationship between the field lenses, slits, return mirror, reflecting prism, turning lenses all define the multiple, preferably two paths. Particularly, there is a double pass through the grating to increase dispersion, reduce scatter while maintaining a perfect temperature independent spectral match for the second pass. Using the same grating twice reduces scatter by about a factor of 1000, increases the dispersion by a factor of two, and eliminates any temperature-related mechanical spectral drift which often is present with two separate monochromators. Because of the specially designed grating structure, the grating can cause the concurrent diffraction of a plurality of incident optical beams, each of which beams have different angles of incidence and different angles of reflection. The path of the incident and the reflected beam to and from the grating is “off-axis”. That is, the beams going to and from the grating do not use ...

Spectrometer arrangement

A spectrometer assembly ( 10 ), comprising an Echelle grating ( 18; 46 ) for dispersing radiation entering the spectrometer assembly ( 10 ) in a main dispersion direction, and a dispersion assembly ( 16; 40 ) for dispersing a parallel radiation bundle generated from the radiation entering the spectrometer assembly in a lateral dispersion direction, is characterized in that the dispersion assembly ( 16; 40 ) is reflective, and the dispersion assembly ( 16; 40 ) is arranged relative to the Echelle grating ( 18; 46 ) in such a way that the parallel radiation bundle is reflected in the direction of the Echelle grating. The Echelle grating ( 18; 46 ) may be arranged in such a way that the dispersed radiation is reflected back to the dispersion assembly ( 16; 40 ).

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.

Manufacturing method of concave diffraction grating, concave diffraction grating, and analyzer using the same

Easy and accurate mating of a groove interval of a groove pattern of a diffraction grating with a position on a convex fixing substrate is enabled. For this purpose, a concave diffraction grating is fabricated by: transferring a groove pattern formed on a plane diffraction grating and having unequal groove intervals onto a metal thin film; forming a first alignment mark on a convex surface of a fixing substrate having the convex surface to fix the metal thin film; mating a second alignment mark formed on an adhesive surface of the metal thin film with the first alignment mark to perform alignment; bonding the adhesive surface of the metal thin film and the convex surface of the fixing substrate to each other to fabricate a master; and transferring a groove pattern of a metal thin film of the master.

System and method for spectral tuning of broadband light sources

Near infrared blood glucose monitoring system

An individualized modeling equation for predicting a patient's blood glucose values is generated as a function of non-invasive spectral scans of a body part and an analysis of blood samples from the patient, and is stored on a central computer. The central computer predicts a blood glucose value for the patient as a function of the individualized modeling equation and a non-invasive spectral scan generated by a remote spectral device. If the spectral scan falls within the range of the modeling equation, the predicted blood glucose level is output to the patient. If the spectral scan falls outside the range of the modeling equation, regeneration of the model is required, and the patient takes a number of noninvasive scans and an invasive blood glucose level determination. The computer regenerates the individualized modeling equation as a function of the set of spectral scans and corresponding blood glucose values.

Spectroradiometer and spectrophotometer

SPECTRORADIOMETER AND SPECTROPHOTOMETER ABSTRACT OF THE DISCLOSURE To provide sufficient sensitivity, spectral resolution and speed of measurement for field environmental measurements in a por-table spectroradiometer, a silicon photodiode receives light: (1) having a bandwidth in the range of between 2 and 15 nm (nanometers) from a pivotable concave holographic diffraction grating within the wavelength range of between 250 and 1150 nm at a scanning rate in the range of 20 to 100 nm per second; (2) having stray light of high intensity and undesired frequencies and the shorter wavelength harmonics of the selected frequency range blocked by filters; and (3) having flux of at least 10 microwatts per square meter of diffuser plate for each nanometer of bandwidth. Automatic electrical zeroing is obtained by blocking all light once at the beginning of each scan, obtaining an electri-cal drift-related signal and using the drift signal to adjust the measured signal during the scan. Several dif-ferent sensing interfaces can be used, including a quartz, light fiber probe having at least a 50% packing density and a cone angle of at least 24 degrees. The data and the pro-gramming storage is at least 30K bytes but the instrument uses no more than two watts of power when the instrument is not scanning.

Echelle polychromator

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

High-resolution double grating monochromator light path device

本发明属于光谱测量仪器领域，为提出结构简单、体积小，又满足高分辨率要求的单色仪或光谱仪器，本发明采用的技术方案是高分辨率的双光栅单色仪光路装置，结构是由光环形器，光纤信号输入端口，入射光纤端口，准直与聚焦镜，光栅1，光栅2，光栅旋转机构和出射光纤端口组成；光纤信号输入端口连接光环行器的第一端口,光信号经过光环行器的第二端口从入射光纤端口进入自由空间，经过双胶合透镜准直以后照射到光栅1上发生第一次衍射，光栅1将光信号衍射到光栅2上进行第二次衍射，紧接着光栅2又将光信号按原路衍射回光栅1进行第三次衍射，第三次衍射光按第一次衍射的入射角返回双胶合透镜。本发明主要应用于光谱测量仪器设计制造。

Spectroscopy device, apparatus and method for estimating bio-information

일 실시예에 따른 분광 장치는 입사광을 분광하는 분산 요소, 분광된 광을 수신하는 복수의 픽셀을 포함하는 디텍터, 복수의 투광부와 불투광부가 교대로 형성되고, 상기 디텍터의 일면에 배치되는 광학 마스크, 및 상기 광학 마스크의 위치를 제어하여, 상기 각 픽셀에서 상기 투광부를 통해 입사된 광을 수신할 유효 픽셀영역을 변경하는 제 1구동부를 포함할 수 있다.

Double monochromator

Cinespectrograph spectrum order separation

Spectroscope

A spectrometer 1A includes a package 2 having a stem 4 and a cap 5, an optical unit 10A disposed on the stem 4, and a lead pin 3 for securing the optical unit 10A to the stem 4. The optical unit 10A includes a dispersive part 21 for dispersing and reflecting light entering from a light entrance part 6 of the cap 5, a light detection element 30 having a light detection part 31 for detecting the light dispersed and reflected by the dispersive part 21, a support 40 for supporting the light detection element 30 such that a space is formed between the dispersive part 21 and the light detection element 30, and a projection 11 protruding from the support 40, the lead pin 3 being secured to the projection 11. The optical unit 10A is movable with respect to the stem 4 in a contact part of the optical unit 10A and the stem 4.

Measuring polarisation