807results about "Spectrum generation using diffraction elements" patented technology

Disclosed herein are spectrometer support systems, as well as related methods, computing devices, and computer-readable media. For example, in some embodiments, a spectrometer support apparatus may: receive, for each of a plurality of calibration samples of an analyte at different known concentrations, an array of spectrometer output intensities of the calibration sample, wherein different ones of the spectrometer output intensities in the array are associated with data representative of different deflection amounts; train a machine-learning computational model, using the plurality of known concentrations of the analyte in the calibration samples and the associated plurality of arrays of spectrometer output intensities, to output a concentration of the analyte in a target sample based on an input array of spectrometer output intensities of the target sample; and use the trained machine-learning computational model as a calibration model for the analyte for subsequent spectrometer operation.

One embodiment provides a compressive hyperspectral imaging system. The compressive hyperspectral imaging system can include a coded aperture configured to spatially encode an optical signal associated with a scene, an integrated photonic device configured to disperse the spatially encoded optical signal, and an array of photo detectors configured to detect the dispersed and spatially encoded optical signal. The output of the array of photo detectors is used for reconstruction of a hyperspectral image corresponding to the scene.

The invention belongs to the technical field of optical instruments, and particularly discloses a C-T light path structure suitable for a near-infrared band Raman spectrometer and application, and the C-T light path structure comprises an entrance slit unit, a self-adaptive aperture unit, a collimation unit, a diffraction unit, a focusing unit and a detection unit; the adaptive aperture unit is located behind the entrance slit unit and coincides with an object space focal plane of the collimation unit, the diffraction unit is located on a reflection light path of the collimation unit, and the detection unit is located on an image space focal plane of the focusing unit; the entrance slit unit comprises an entrance slit which is connected with an SMA905 optical fiber; the self-adaptive aperture unit comprises a diaphragm, the collimation unit comprises a collimating mirror, the diffraction unit comprises a plane scribed line diffraction grating, and the focusing unit comprises a focusing mirror and a cylindrical mirror. The optical path system provided by the invention not only realizes a compact structure, but also ensures the stability, high resolution and detection precision of the system.

A compact structure for snapshot hyperspectral imaging may include an image splitter, an integral field-of-view unit, an integral field-of-view spectrometer, and a multiplexed integral field-of-view spectrometer. The image splitter includes: a first section having a first plurality of mirrors, each of the first plurality of mirrors having a predetermined inclination in a longitudinal direction; a second section having a second plurality of mirrors, each of the second plurality of mirrors having a predetermined inclination in the longitudinal direction; and a ridge extending laterally between the first section and the second section, the first section being at a first angle relative to the ridge, and the second section being at a second angle relative to the ridge opposite the first angle. The integral field-of-view unit light source includes a four-mirror design that includes an image splitter. The integral field-of-view spectrometer includes a spectrometer array and an image splitter.

A substrate processing apparatus that can radiate light on a composition in an optimum radiation amount based on acquired spectral sensitivity characteristics can be provided.A substrate processing apparatus configured to perform pattern formation processing on a composition on a substrate includes a first radiation unit configured to radiate first light onto the substrate, a dispenser configured to apply the composition to a first position inside the substrate processing apparatus, a template holding unit configured to hold a template to be brought in contact with the composition on the substrate, and a controller configured to control a radiation amount of the first light to be radiated by the first radiation unit based on spectral sensitivity characteristics of the composition that are measured in advance.

The invention relates to a method for calibrating a light source and a spectrometer. A calibration light source includes: a broadband light source that emits light in a broad spectral range; and a filter receiving the light emitted by the broadband light source and providing structured light by applying an attenuation pattern on the received light exhibiting pattern characteristics at a plurality of spectral reference lines, the calibration light source is configured such that the emission spectrum of the structured light emitted by the calibration light source exhibits unique identifiable emission spectrum characteristics corresponding to the mode characteristics at a plurality of spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is also disclosed.

The invention discloses a MHz frame frequency high-speed spectral measurement system and method, and mainly solves the technical problems that a traditional spectrometer is low in frame frequency, cannot capture spectral change in a high-speed dynamic process in real time, is limited in application scene and the like. The spectral measurement system comprises a slit, a first collimating mirror, a spectral dispersion element, a spectral signal amplification module, a spectral coupling module, a spectral acquisition module and a data processing module, the slit is used for limiting an incident space of a light beam and changing a divergence angle of the light beam; the first collimating mirror is located on the side, away from the to-be-measured object, of the slit. The spectral dispersion element is located on a reflection light path of the first collimating mirror; the spectral signal amplification module is located on a diffraction light path of the spectral dispersion element; the spectrum coupling module, the spectrum acquisition module and the data processing module are sequentially arranged, the spectrum coupling module is used for focusing the spectrum band captured by the spectrum signal amplification module to form a spectrum image, and the spectrum image is acquired by the spectrum acquisition module and then transmitted to the data processing module.

The invention belongs to the technical field of ICP spectral analysis, and particularly relates to an angle-adjustable monochromator type concave holographic grating, a spectrometer and a method. A servo motor in the holographic grating is connected with a lead screw mechanism and can drive a lead screw of the lead screw mechanism to rotate, a polished rod bearing is connected to a connecting block, the connecting block is fixed to the movable end of the lead screw mechanism, a monochromator type concave holographic grating body is connected to a movable base, one end of a polished rod makes contact with the monochromator type concave holographic grating body, and the other end of the polished rod makes contact with the movable base. The other end is matched in the polish rod bearing; according to the invention, two DMDs and a monochromator type concave holographic grating are adopted to realize spatial imaging spectral analysis, the first DMD realizes spatial position selection of an ICP plasma torch, the monochromator type holographic grating realizes high-efficiency and simple-structure rotating grating type light splitting, and the second DMD is selected as an exit slit with adjustable width to carry out fine light splitting on a selected wave band, so that the light splitting efficiency of the ICP plasma torch is improved. Therefore, the spatial imaging spectrum analysis of the ICP plasma torch by the system is realized.

The invention relates to a spectrum device and a spectrum calibration and detection method. The spectrum device comprises a monochromator module which is used for carrying out light splitting on a broadband optical signal and outputting narrowband monochromatic light; the first detection light path module is used for carrying out light signal detection on the narrowband monochromatic light to obtain a first detection signal; the data acquisition and processing module is used for acquiring photon number information of the first detection signal, acquiring broadband tunable monochromatic light according to the photon number information, and performing spectrum calibration according to the broadband tunable monochromatic light; the monochromator module is also used for splitting the spectral signal of the to-be-measured target and outputting a spectral distribution signal; the second detection light path module is used for carrying out light signal detection on the spectral distribution signal to obtain a second detection signal; and the data acquisition and processing module is also used for acquiring arrival photon information of the spectrum distribution signal and performing spectrum detection on the to-be-detected target according to the arrival photon information. By adopting the device, high-precision broadband tunable monochromatic light output and spectrum detection can be realized.

According to an embodiment, a method for determining via an iterative training procedure, a phase modulation function, a spectral transmission function and a post-processing procedure that are useable in a hyperspectral imaging, HSI, apparatus (100) is provided, wherein the HSI apparatus (100) comprises a lens assembly (110) comprising a diffractive optical element, DOE, (112) arranged to implement said phase modulation function that results in a phase delay that varies with the spatial position of an aperture of the DOE (112), an image sensor assembly (120) arranged to receive light through the lens assembly (110), the image sensor assembly (120) comprising a two-dimensional,2D, color filter array, CFA, (124) arranged on an image sensor (122) such that the light received through the lens assembly (110) enters the image sensor (122) through the CFA (124), wherein the CFA (124) is arranged to implement said spectral transmission function that results in a spectral transmission that varies with a wavelength and with a spatial position of the CFA (124); and a controller (130) comprising an image reconstruction portion arranged to derive the HS image based on light received on the image sensor (124) via application of said post-processing procedure that comprises an artificial neural network, ANN, the method comprising processing a plurality of training items through a training network (300) that represents an arrangement of the lens assembly (110), the CFA (124) and the post-processing procedure in the HSI apparatus (100) and that comprises respective training models (302, 304, 306) for determining the phase modulation function, the spectral transmission function and weights of the ANN, and wherein the training model (304) for determining the spectral transmission function accounts for one or more predefined implementation constraints of the CFA (124).

The invention provides a high-frequency monochromator and a light splitting method thereof, and is characterized in that the high-frequency monochromator comprises a spectrograph and a scanning emitting mechanism, and the scanning emitting mechanism is loaded after the spectrograph emits a light beam; an entrance slit, a spectrograph, a field diaphragm, a collimation optical assembly, a rotary reflector or a rotary reflector with a grating light splitting function, a convergence imaging assembly and an exit slit are sequentially arranged along a light path, and light is emitted through the field diaphragm and the exit slit to form an L-shaped light path; the entrance slit, the spectrograph, the field diaphragm, the collimation optical assembly, the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function, the convergence imaging assembly and the exit slit are all vertically fixed to the horizontal plane, and the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function is arranged at the switching position of the L-shaped light path; the monochromator is simple in light splitting structure and efficient in light splitting.

A calibration light source includes: a broad band light source emitting light in a broad spectral range; and a filter receiving light emitted by the broad band light source and providing structured light by imposing an attenuation pattern exhibiting pattern features at multiple spectral reference lines on the received light such that an emission spectrum of the structured light emitted by the calibration light source exhibits distinct, identifiable emission spectrum features corresponding to the pattern features at the multiple spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is further disclosed.

The utility model discloses an echelle grating spectrometer based on a digital micromirror device, which belongs to the technical field of spectrometers and comprises an echelle grating spectrometer, a digital micromirror, a reflection focusing mirror, a photomultiplier, a data acquisition card and an upper computer. The light is spatially modulated through a digital micromirror, the light is focused on a photomultiplier, and information is received by a data acquisition card; time sequence synchronization of the digital micromirror and the data acquisition card is completed by transmitting a synchronizing signal of the digital micromirror to the data acquisition card, and meanwhile, an overturning mode of the digital micromirror is designed, so that rapid scanning imaging is realized. According to the echelle grating spectrometer based on the digital micromirror device, the cost is reduced, and the time for acquiring spectral information is shortened.

This invention relates to the field of optical imaging and detection technology, specifically providing a broadband snapshot-type polarization interferometry imaging detection system and method for breast tumors. A broadband light source illuminates a breast tumor tissue sample. The reflected signal light is collected and collimated by a pre-optical system, then sequentially passes through a first and a second ray shaping unit for two shearing and two polarization state transformations, resulting in two beams of linearly polarized light and two beams of circularly polarized light. These beams are imaged by an imaging lens to an area array detector to obtain a polarization interferogram, which is then demodulated to obtain all Stokes parameters of the breast tumor tissue sample. This invention achieves broadband snapshot imaging of breast tumors with all Stokes parameters without using an analyzer, doubling the light throughput compared to traditional polarization imaging instruments using analyzers. Furthermore, this invention has advantages such as compact structure, no moving parts, easy assembly and adjustment, and no need for image registration.

A monitoring device (31) serves to monitor an EUV collector (24) of a projection exposure system. The monitoring device (31) has at least one stray light detector (32) for detecting stray light (20) with a wavelength that differs from the wavelength of the EUV useful light (3). A detection component (33) of the stray light detection device (32) is arranged adjacent to a collection area (26) of the EUV collector (24), into which the EUV useful light (3) emanating from a source area (19) is transferred by the EUV collector (24). This results in a monitoring device in which stray light monitoring allows conclusions to be drawn about the state of at least one component of the projection exposure system, in particular the EUV collector.

The present disclosure provides an auto-focus spectrometer, including: a grating element configured to split light; an imaging element configured to converge a light beam; a controller configured to move the imaging element to realize autofocus, and connected to the imaging element; and a detector; and an incident light is diffracted through the grating to the imaging element, and then converged to the detector through the imaging element to obtain spectrogram information. The present disclosure automatically adjusts the imaging element position according to the configuration and operation state of the spectrometer, so that the spectrometer can be automatically kept at an optimal imaging position and exert the best performance thereof.

A spectrometer for detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, a method of detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, and a method of constructing the spectrometer. The method comprises the steps of creating dispersed images of an entrance aperture on a plane of an exit aperture, such that respective images at the different wavelength components are offset by different amounts of displacements along a direction of dispersion; gathering a first EM wave energy incident on the entrance aperture to an EM detector; gathering a second EM wave energy that exits the exit aperture to the at least one single-pixel detector; and measuring the output of the EM detector and the output of the at least one single pixel detector for reconstructing the EM wave spectrum taking into account an intensity distribution of an incident EM wave on the entrance aperture.

Provided is an image display apparatus capable of detecting the amount of light of each wavelength of the ambient light transmitted through the image display panel with high accuracy in an image display apparatus including an image display panel and an ambient light sensor system. An image display apparatus includes an image display panel and an ambient light sensor system, in which the image display panel includes a transmission unit that allows ambient light to pass through in a display region. The ambient light sensor system includes a diffraction grating that diffracts light of each wavelength component at different angles according to a wavelength of the ambient light that has passed through the transmission unit, and a light detection unit that receives the light diffracted by the diffraction grating.

The invention discloses a high-resolution scanning spectrometer based on a linear array detector and a use method, and belongs to the technical field of spectrum instruments and spectral analysis. The first aspherical mirror is used for reducing the diameter of a light beam emitted by the light source, and the second aspherical mirror is used for collimating effective wave band light passing through the slit into parallel light beams; the plane scribed grating is used for diffracting the light beam; the reflection system is used for reflecting the light beam to enable the light beam to enter the plane scribed grating again for secondary diffraction; the first spherical mirror is used for collimating light beams passing through the first aspherical mirror, the second spherical mirror is used for converging the light beams diffracted for the first time at the slit, and the third spherical mirror is used for converging the light beams diffracted for the second time into the linear array photoelectric detector. The advantages of a light splitting type spectrograph and a scanning type spectrograph are combined, a reflection type light path structure is adopted, extra aberration introduced by a transmission type light path is avoided, the data acquisition efficiency is improved, and high-quality imaging is guaranteed.

The technology provides a method and apparatus for standardizing spectral resolution across multiple spectrometers using custom input slit dimensions. A plate with a slit may be replaced to provide various slit widths to obtain desired spectrometer resolution. Alternatively, the plate may include an adjustable slit width that is mechanically adjusted over a desired range of values. The slit width may be adjusted by discrete increment amounts determined based on an end application. A resolution of a tunable spectrometer may be calibrated to match a reference spectrometer by customizing a slit width value. The technology enhances the accuracy of spectral classification algorithms by minimizing variability of Raman spectra introduced by spectrometer component differences in lenses, gratings, and detectors, for example.

A hyperspectral imaging device includes an optical channel arranged to focus light at a first image plane. A spectrometer includes a slit formed at the first image plane to allow a slit-shaped portion of the light pass through. A dispersive element receives light from the slit and spectrally disperses it along a direction perpendicular to a width of the slit. A focusing lens focuses the spectrally dispersed light at a second image plane such that the spectral dispersion is imaged along a first axis thereof, and a spatial image of the slit width is imaged along a second axis for detection by a sensor. A sliding lens group between the optical channel and the first image plane moves to direct the incident light, scanning the entire image over the slit such that multiple frames acquired by the sensor each correspond to a horizontal line of the image.

Disclosed are a hyperspectral imaging method and an apparatus thereof. A method of reconstructing a hyperspectral image includes receiving an image photographed through a diffractive optical element and reconstructing a hyperspectral image of the received image based on the received image and information about a point spread function for each wavelength of the diffractive optical element. The diffractive optical element may generate an anisotropic shape of the point spread function that varies with a spectrum.

Processes and systems for monitoring one or more gases dissolved in a liquid. In some embodiments, the process can include introducing a fluid into an inlet of a sample cell, where the fluid includes at least one gas dissolved in a liquid. The fluid can flow through the sample cell such that at least a portion of the fluid flows past an optical window such that the fluid is viewable within the sample cell through the optical window. The fluid can be recovered from an outlet of the sample cell. An electromagnetic radiation signal can be emitted into the sample cell through the optical window for at least a portion of the time the fluid is viewable through the optical window. The fluid can be contacted with the electromagnetic radiation signal within the sample cell. A scattered electromagnetic radiation signal that can include elastic scattered radiation and inelastic scattered radiation emitted from the sample cell through the optical window can be directed into a filter to remove at least a portion of the elastic scattered radiation to produce a primarily inelastic scattered radiation signal. The primarily inelastic scatted radiation signal can be directed to a detector to detect a Raman signal indicating the presence of the at least one dissolved gas in the liquid.

The invention belongs to the field of spectral measurement and imaging, and particularly discloses a single-photon detection device and a rapid spectrum and imaging system based on the single-photon detection device. According to the invention, the transmission-type optical fiber spectrometer separates polychromatic light of each wave band in space according to the wavelength, couples photons of different wavelengths into the optical fiber array for time delay, delays different wavelengths to different moments, and outputs the time to the single-photon detection device; the single-photon detection device converts photons of different wavelengths which arrive in time in sequence into electric signals, the number of photons at different moments is obtained after amplification and signal processing, and the photons are converted into spectrums. As the transmission-type spectrometer can provide higher diffraction efficiency, higher spectral resolution and higher signal intensity, and the single-photon detection device can provide a faster and more accurate photon discrimination and photon counting method, compared with the prior art, the spectrum can be measured more quickly on the whole, and higher spectral resolution and higher signal intensity are achieved.

Disclosed herein are scientific instrument support systems, related methods, computing devices and computer-readable media. A method of mitigating distortion of an optical emission spectrum obtained from an optical emission spectrometer is provided. The method may comprise a step of obtaining a spectrum recorded with the spectrometer and a respective one or more condition parameters indicative of an operating condition at a time of recording the spectrum. The method may further comprise a step of providing a model configured to output, in response to the one or more condition parameters, one or more transform parameters of a transformation to be applied to the obtained spectrum. A transformation may be applied in accordance with the obtained one or more transform parameters to the obtained spectrum to mitigate distortion of the spectrum due to a discrepancy between the operating condition and a baseline operating condition.

Example embodiments provide a biomedical illumination device enabling multiwavelength laser line generation with automated beam alignment. The biomedical illumination device may include a plurality of laser light sources configured to provide beams of one or more wavelengths, wherein one or more of the beams are directed towards one or more actuator-controlled mirrors; the one or more actuator-controlled mirrors configured to steer the one or more beams for passing through a beam shaping element, wherein for each of the one or more beams at least one actuator-controlled mirror is configured for steering the respective beam automatically according to instructions received from a control device; the beam shaping element configured to output a beam pattern having a certain geometry for illumination of a microscopic sample based on the steered beams; and the control device configured to monitor the beams output from the beam shaping element to determine a position of the output beam pattern in relation to a target beam pattern position at the sample; determine instructions for one or more of the actuator-controlled mirrors to tilt in at least one axis based on a difference between the monitored position of the output beam pattern and the target beam pattern position at the microscopic sample; and transmit the instructions to the one or more actuator-controlled mirrors.

The invention is suitable for the field of electrochemical luminescence detection equipment, and provides a dispersion device suitable for electrochemical luminescence detection, which comprises a monochromator body, the monochromator body is composed of a monochromator housing, a reflector assembly, a grating assembly, a collimating mirror assembly, a focus lens assembly, a slit, a flange snap ring and a flange; an M-shaped light path is arranged in the monochromator body, and a slit, a reflector assembly, a collimating mirror M1 in the collimating mirror assembly, a customized blazed grating G1 in the grating assembly and a focusing mirror M2 in the focusing mirror assembly are sequentially arranged in the light propagation direction. The customized blazed grating G1 is designed by adopting specific parameters including the scribed line density, the blazed wavelength, the notch groove depth and the groove width ratio, and primary light energy enhancement and secondary light intensity suppression can be realized; according to the invention, an optical filter is not needed, the diffraction efficiency of a monochromator is improved to 60-86%, the intensity ratio of luminol secondary light to primary light is less than or equal to 1.6%, the detection limit of ruthenium bipyridine is reduced from 100pmol / L to 50pmol / L, and the electrochemical luminescence detection device is suitable for various electrochemical luminescence detection scenes.

A camera system and a corresponding encoder mask are presented. The camera system comprises: a detector array comprising a plurality of light sensitive pixels, an encoder mask comprising an array of a plurality of similar unit cells having selected encoder pattern, and a lens arrangement comprising one or more optical lenses positioned for imaging input light onto said encoder mask. Each of the plurality of similar unit cells carries an encoding pattern having at least first and second axes of symmetry. Alternatively, or additionally, the unit cells of said encoder mask are larger than a diffraction limited spot defined by the lens arrangement and the encoder mask is displaced from image plane defined by the lens arrangement thereby allowing for optical spot to cover a unit cell of said encoder mask.

To provide an autoanalyzer in which it is made possible to start sample analysis with high accuracy in a short time by stabilizing temperatures of an optical detection element and a diffraction grating early.SOLUTION: The present disclosure proposes an autoanalyzer comprising: a light source for irradiating a reaction container in which a sample and a reagent are mixed and reacted; a spectroscopic element for separating light having passed through the reaction container into spectral rays; a light detection element for detecting light having been separated by the spectroscopic element; a fixing member for fixing the light detection element and the spectroscopic element into position; a measurement chamber for accommodating the spectroscopic element and the light detection element; a heating device installed to the fixing member; a control device for controlling the heating device; a temperature sensor support member installed to the fixing member on the inner side of the measurement chamber near the light detection element; and a measurement chamber internal temperature sensor installed to the temperature sensor support member. A thermal time constant from the heating device to the light detection element lies in the range from 80% to 120% of a thermal time constant from the heating device to the measurement chamber internal temperature sensor, and the control device controls the heating device so that the temperature detected by the measurement chamber internal temperature sensor equals a prescribed temperature.SELECTED DRAWING: Figure 2

An optical module includes: a diffraction grating configured to rotate and focus a beam, which is incident thereon from an incident path, onto a Fourier plane, a digital micromirror array (DMD) configured to assign a frequency for each wavelength of the focused beam received at the Fourier plane, and perform a Fourier transform for each frequency, and a first optical fiber configured to receive a beam that is reflected back from the DMD back and the diffraction grating, and along the incident path.