21results about "Spectrum generation" patented technology

The utility model provides a kind of spectrum domain OCT structure of enhanced sample arm signal, including the output end of light source emitter is connected with the first end of circulator, the second end of circulator is connected with the input end of coupler, the first output end of coupler is connected with the input end of reference arm, the second output end of coupler is connected with the input end of sample arm;The second end of circulator is connected with the input end of spectrometer.The utility model can prevent the weakening of interference signal.

To effectively address the diversification of hidden camera functions, better protect user privacy, and provide a portable, multi-functional detection device that is easy to carry, easy to use, relatively inexpensive, and advantageous for widespread adoption and use. [Solution] The device includes a housing 1, a handle 11 provided on the housing, a control circuit board 2 provided inside the housing, an infrared detector 3 and a red light generator provided on the housing, both of which are electrically connected to the control circuit board, the infrared detector is used to detect red light emitted from the camera, the red light generator is used to emit red light toward the camera, and a signal detection module 5 is further provided on the control circuit board, which is used to detect whether or not a communication signal is present in the surroundings.

To provide an imaging optical system capable of scanning an object with a simple mechanism without moving the object and an imaging element.SOLUTION: An imaging optical system 10 according to the present disclosure is used for obtaining a spectral image of an object S by guiding light L for imaging the object S into an imaging element 31, the system comprising: a first diaphragm 11 positioned on an objective lens 70 side; a scanning part 12 positioned on an imaging element 31 side relative to an image forming position of the light L having passed through the first diaphragm 11; a light condensing part 13 condensing the light L having passed through the scanning part 12; a second diaphragm 14 positioned on the imaging element 31 side relative to the light condensing part 13; and a slit 15 disposed on a position at which the light L passes through the second diaphragm 14 and is condensed by the light condensing part 13. The slit 15 causes only the light L corresponding to a predetermined region of the object S out of the light L having passed through the scanning part 12 to pass. The scanning part 12 changes the predetermined region to scan the object S while keeping constant an optical path length between the image forming position and the light condensing part 13.SELECTED DRAWING: Figure 1

An optical imaging system which includes multiple optical paths arranged in parallel, and which is athermalized. It is further suitable for preventing image overlap occurring inside useful areas of a matrix image sensor that is common to the optical paths. A thermal compensation device for effecting the athermalization is also used to support a baffle which removes image overlap in the useful areas.

The application discloses an Au-WS2-Au van der Waals Schottky junction type photoelectric sensing unit, preparation and application, and belongs to the technical field of semiconductor devices. The sensing unit is composed of a substrate, a two-dimensional material layer transferred by a dry method and an Au electrode, the two-dimensional material is preferably WS2, the Au electrode forms a van der Waals contact with the two-dimensional material and constitutes a Schottky junction; the structure can effectively inhibit Fermi level pinning effect, realize dynamic modulation of a Schottky barrier, and produce characteristic reverse-bipolar light response and stable spectral modulation varying with wavelength under the regulation of a gate; the occupied area is only about 73 mu m 2 , and the sensing unit can accurately reconstruct monochromatic and broadband spectra in the 380-680 nm visible light band, with an average reconstruction accuracy of 0.746 nm and a spectral resolution better than 10 nm. The sensing unit can be applied to a miniature computing spectrometer, effectively solves the technical defects of complex preparation and difficult regulation of existing devices, and meets the requirements of miniaturization and integration detection.

The application discloses a resolution customizable miniature spectrometer based on a transverse dispersion super surface, which comprises a dispersion super surface array structure and a focal plane pixel array, wherein the dispersion super surface array structure comprises a plurality of array distributed dispersion super surface subarrays for preliminary spectral decoupling and directional convergence; the dispersion super surface subarray comprises a plurality of dispersion super surface units and a whole medium substrate thereof; the dispersion super surface unit is a nano column with four-fold symmetry; the nano columns are periodically arranged; the transmission light phase is dynamically controlled according to the incident light frequency omega, so that the focal point position (x', y') of the transmission light on the focal plane is linearly mapped with the change of omega; and the focal plane pixel array comprises a multi-element plane array composed of a plurality of pixels, which is pixel level registered with the dispersion super surface subarray. The application realizes accurate light condensation at the pixel level, effectively suppresses crosstalk, improves detection accuracy and realizes real snapshot spectral imaging.

The invention relates to an image detection device for viewing a laser spot in a colour image. The device comprises an array of photosites and an array of microfilters, comprising four distinct types of microfilters, three first types of which exhibit transmission in two spectral ranges, and a fourth type of which exhibits transmission in only one of the two spectral ranges. The device further comprises a band-stop optical filter in a sub-range of a second spectral range. The device is configured to construct (301) an image for each type of microfilter; correct (302) each image resulting from a first type of microfilter by subtracting values weighted by a coefficient from pixels in the image resulting from the fourth type of microfilter; obtain (303) a colour image from the corrected images, detect (304) a laser spot in the image resulting from the fourth type of microfilter and insert (305) the laser spot into the colour image.

The invention relates to a filter device comprising: a first filter carrier (10) having x first optical filters (11, 12); and a second filter carrier (20) having y second optical filters (21-23), wherein x and y each independently have a value of at least 2, and wherein the filter carriers (10, 20) are each designed such that one filter (11, 12, 21-23) of each filter carrier (10, 20) can be positioned in an optical path of the filter device. Each first optical filter (11, 12) transmits light in a first wavelength band (71, 72), and each second optical filter (21-23) transmits light in x second wavelength bands (81-86), wherein the first wavelength bands (71, 72) do not overlap, the second wavelength bands (81-86) do not overlap, and each first wavelength band (71, 72) contains a second wavelength band (81-86) from each of the second optical filters (21-23). An optical analysis device comprises a light source (41), a sample carrier (42), and an optical sensor (43). The filter device is arranged in an optical path between the light source (41) and the sample carrier (42) and / or in an optical path between the sample carrier (42) and the optical sensor (43). In a method for operating the optical analysis device, a sample (50) is arranged on the sample carrier (42), is excited to fluoresce by means of the light source (41), and light emitted by the sample (50) is detected by the optical sensor (43), wherein a fluorescence analysis of the sample is carried out in x · y optical channels.

An electromagnetic radiation measurement device is disclosed, including an electromagnetic radiation sensor and a reconfigurable filter assembly. The reconfigurable filter assembly has a series of configurations, each configuration of the series filtering to a different wavelength band for measuring by the sensor. The wavelength bands of adjacent configurations of the series overlap thereby to define differential sub-bands. The device also includes a processor configured to utilise sensor measurements for different configurations of the series to derive measurement values for the sub-bands.

A broadband device (D) for performing spectral analysis on a signal of interest includes: - a source (S) designed to generate the signal of interest (Si); - a beam splitter element (ES) designed to spatially split the signal of interest into a first signal (V1) and a second signal (V2); - a first frequency-shifting optical cavity (DBDF, BDF1) including: a first frequency shifter (AOM1) designed to shift the optical frequency of the first signal by a first frequency f1 per round trip in the first cavity, the first cavity having a first travel time τ1; - a second frequency-shifting optical cavity (DBDF, BDF2) including: a second frequency shifter (AOM2) designed to shift the optical frequency of the second signal by a second frequency f1 per round trip in the second cavity. Rate f2, the second cavity has a second travel time τ2; the first and second optical cavities are designed such that the maximum number of round trips of the signal in the first and second cavities is equal to a predetermined N; - detector (PD) is designed to coherently detect the first signal (W1) transmitted by the first cavity and the second signal (W2) transmitted by the second cavity, and generate a photocurrent (Tr) proportional to the light intensity detected by the detector; - analog low-pass filter (LP) is designed to filter the photocurrent at frequencies below a certain threshold; - processor (UT) is configured to calculate the square modulus of the photocurrent filtered by the low-pass filter, and determine a time representation of the frequency information of the signal of interest based on the square modulus.

The invention relates to an optical analysis device, in particular for point-of-care diagnostics, comprising a light source (11), a sample carrier (12), and an optical sensor (13), wherein a first filter carrier (20) having f first optical multi-bandpass filters (21-23) is arranged in an optical path (51) between the light source (11) and the sample carrier (12), and a second filter carrier (30) having f second optical multi-bandpass filters (31-33) is arranged in an optical path (52) between the sample carrier (12) and the optical sensor (13), wherein f is at least 2, and wherein, in each case, one wavelength band of a first multi-bandpass filter (21-23) and one wavelength band of a second multi-bandpass filter (31-33) form an optical channel. In a method for operating such an optical analysis device, a sample (40) is arranged on the sample carrier (12), is excited to fluoresce by means of the light source (11), and light emitted by the sample (40) is detected by the optical sensor (13).

A portable multi-purpose detector, characterized in that it comprises a housing (1) wherein the housing (1) is provided with a handle (11), a control board (2) is arranged in the housing (1), and an infrared detector (3) and a red light generator (4) are arranged on the housing (1); wherein the infrared detector (3) and the red light generator (4) are both electrically connected to the control board (2); the infrared detector (3) serves to detect red light emitted by a camera; the red light generator (4) serves to emit red light in the direction of the camera; wherein the control board (2) is further provided with a signal detection module (5) which serves to detect whether a communication signal is present in the environment.

The invention relates to a single-photon spectrometer (10) with at least one dispersion element (40) having a first optical dispersion, and a photon detector (30) arranged to detect at least one photon (15) that has passed through the dispersion element (40), and a time-of-flight meter (60) configured to automatically measure the transit time (t) of the at least one photon (15) through the dispersion element (40), wherein the photon detector (30) is configured to automatically determine a wavelength (λ) of the at least one photon (15) from the transit time (t).

A spectrometer device (110) for acquiring spectral information relating to at least one object (112) is disclosed. The spectrometer device (110) is: — with at least one detector (116) for detecting light from an object (112); — comprising at least one optical filter (122) configured to transfer incident light within at least one selected wavelength range to the detector (116); — with at least one light source (126) configured to emit light in at least one optical spectral range; —At least one sample interface (132) configured to allow light emitted from the light source (126) to illuminate an object (112) held by the sample interface (132), and to allow light from the object (112) held by the sample interface (132) to propagate to the detector (116) via the light filter (122), wherein the sample interface (132) comprises at least one module cover window (134) including at least one substrate (136), and the module cover window (134) comprises at least one internal calibration target (138) that partially covers the substrate (136); —At least one first optical path (140), the first optical path (140) is configured to allow light emitted from the light source (126) to propagate to the detector (116) via the optical filter (122) by passing through the sample interface (132) at least once; —At least one second optical path (142), the second optical path (142) is configured to allow light emitted from the light source (126) to propagate to the detector (116) via the optical filter (122) by interacting with the internal calibration target (138) at least once, It is equipped with.

A spectrometer device (110) for obtaining spectroscopic information regarding at least one object (112), the spectrometer device (110) comprising: - at least one detector (116) for detecting detection light (118) from the object (112); - at least one optical filter (120) configured to transfer incident light within at least one selected wavelength range to the detector (116), the transmission profile of the optical filter (120) being dependent on the angle of incidence, the at least one optical filter (120); - at least one light source (124) configured to emit irradiation light (126) within at least one optical spectrum range; - at least one sample interface (130) configured to enable the irradiation light (126) to irradiate the object (112) and to enable light from the object (112) to propagate to the detector (116) via the optical filter (120); - at least one first optical path (132), the first optical path (132) being configured such that the irradiation light (126) passes through the sample interface (130) at least once and thereby propagates to the detector (116) via the optical filter (120), the optical filter (120) having a first transmission profile T 1,NBP for the first optical path (132); - at least one internal calibration target (134) and at least one second optical path (136), the second optical path (136) being configured such that the irradiation light (126) interacts with the internal calibration target (134) at least once and thereby propagates to the detector (116) via the optical filter (120), the optical filter (120) having a second transmission profile T 1,NBP for the second optical path (136); comprising The transmission profiles of the optical filters (120) of the first optical path (132) and the second optical path (136) are relative to each other. 1,NBP (λ) = d·T 2,NBP A spectrometer (110) in which (λ) is proportional and d does not depend on one or more of temperature, wavelength, or angle of incidence.

Provided is a sample stage that can minimize increases in manufacturing costs and that can rotate a sample to various angles or move the sample in various directions. In an optical measurement device having a light source and a light detector (125), a sample stage (100) for arranging a solid sample on an optical axis (501) of measurement light from the light source to the light detector is provided with: a sample holding portion (170, 180) that holds the solid sample; an up-down movement mechanism (160) that supports the sample holding portion and moves the sample holding portion up and down; a horizontal movement mechanism (140, 150) that supports the up-down movement mechanism and moves the up-down movement mechanism in a horizontal plane; a yaw angle changing mechanism (130) that supports the horizontal movement mechanism and rotates the horizontal movement mechanism about a vertical axis; and a detector rotation mechanism (120) that rotates the light detector about the vertical axis.

This application discloses a multispectral imaging module, a mobile terminal, and an image processing method. The multispectral imaging module specifically includes: a lens for receiving and focusing light signals; a filter unit for filtering the light signals focused by the lens to allow light signals of at least two wavelengths to pass through and limit the intensity of light signals of at least a portion of the at least two wavelengths; a multispectral sensor for separating the light signals filtered by the filter unit into light signals of multiple wavelengths and converting the light signals into electrical signals to obtain spectral image data of multiple wavelengths; and an image processor for obtaining spectral information of the current scene based on the spectral image data of multiple wavelengths. Thus, by limiting the intensity of light signals of the allowed wavelengths through the filter unit, interference from these wavelengths to other wavelengths can be reduced while retaining some information of these wavelengths, thereby improving the spectral reconstruction accuracy of the captured scene.

This invention discloses a high-precision radiance calibration device and method with adaptive bandwidth, belonging to the field of radiometric calibration technology. The device includes a light source module, an automatic bandwidth-adjustable monochromator module, a homogenization and depolarization module, and a standard reference module connected in sequence, as well as a control and data processing module electrically connected to each module. The slit of the automatic bandwidth-adjustable monochromator module is driven by a stepper motor. The control and data processing module has a built-in adaptive algorithm unit, which, combined with real-time feedback from a laser wavelength meter, achieves automated and precise bandwidth adjustment. The method includes parameter input, preprocessing, intelligent bandwidth matching, light source output and homogenization, alternating calibration measurement, and data processing and output steps. It matches the optimal bandwidth based on bandwidth matching criteria and simultaneously adjusts the rotation speed of the diffuse reflector to synergistically suppress interference, polarization, and stray light effects. This invention achieves full-process automation of calibration, significantly shortens the calibration cycle across the entire wavelength band, and is compatible with the calibration of various spectrometers.

This invention discloses a high-frame-rate multispectral infrared imaging system and method based on multi-aperture multiplexing, belonging to the field of spectral imaging technology. The system includes a converging imaging optical unit, a collimating or relay optical path, a multi-aperture replication imaging unit, a spectral selection unit, an area array uncooled infrared detector, and an image processing module. The converging imaging optical unit is used to converge and image the target scene to form a primary image plane; the collimating or relay optical path is located after the primary image plane and is used to collimate or relay the imaging beam; the multi-aperture replication imaging unit is used to replicate the same scene to form multiple sub-aperture images arranged in two dimensions; the spectral selection unit is located in the replication imaging optical path and is used to perform spectral grouping of the sub-aperture images; the area array uncooled infrared detector is used to receive the multiple sub-aperture images and perform line-by-line exposure and readout using a rolling shutter method; the image processing module is used to perform spectral grouping and temporal reconstruction processing on the sub-aperture images.

This invention provides a telescope objective for a short-wave infrared imaging spectrometer, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, an aperture stop, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens. The structure is simple, with all lenses being glass spherical mirrors. Each lens uses domestically produced glass, offering advantages such as high production frequency, ample supply, and low cost. The use of the same material for some lenses improves production efficiency and reduces optical cold processing costs. Furthermore, the design of this invention is image-side telecentric, ensuring that the principal rays from each field of view are perpendicularly incident on the image plane. This satisfies the requirement that the principal rays from each field of view are perpendicularly incident on the entrance slit of the short-wave infrared imaging spectrometer, fulfilling the system's requirements for the front telescope objective.

A method for spatially resolved color determination, comprising the steps of projecting (S101) a first structured-light pattern having a first wavelength of light onto a dental object; detecting (S102) a first spatially resolved optical parameter set based on the reflected or remitted first structured-light pattern; projecting (S103) a second structured-light pattern having a second wavelength of light onto the dental object; detecting (S104) a second spatially resolved optical parameter set based on the reflected or remitted second structured-light pattern; and calculating (S105) a third spatially resolved optical parameter set at a third wavelength of light based on the first and second spatially resolved optical parameter sets.