95 results about "Polarized spectroscopy" patented technology

The invention relates to the technical field of polaroid performance optimization, and discloses a performance optimization design method and system for a multi-layer composite polaroid, and the method comprises the steps: carrying out the polarization spectrum analysis of a use environment of a display screen, obtaining incident polarization spectrum data, and calculating the initial stretch ratio data of each polarization layer; measuring to obtain molecular orientation degree data and polarization performance data of each polarization layer; performing feature extraction and fusion to obtain a fusion feature vector of each polarization layer; calculating the influence of the molecular orientation degree change of each polarized light layer on the optical performance of different polarization states to obtain the importance weight of the polarization state of each polarized light layer; reinforcement learning optimization is carried out, and a stretch ratio adjustment strategy of each polarization layer is generated; according to the technical scheme, multi-objective optimization and sequential quadratic programming are carried out on the processing parameters of each polarizing layer, and the stretching temperature and speed control sequence of each polarizing layer is generated, so that the precise control of the stretching temperature and speed is realized, and the performance index and the production efficiency of the polaroid are improved.

The invention relates to a polarization spectrum imaging device and a polarization spectrum reconstruction method, in particular to a miniature high-energy-efficiency diffraction polarization spectrum imaging device and a polarization spectrum reconstruction method thereof, and solves the technical problems that an existing polarization spectrum imaging device is low in energy utilization rate and regulation and control precision and large in size. According to the miniature high-energy-efficiency diffraction polarization spectrum imaging device provided by the invention, the diffraction spectrum lens module, the electronic control rheological lens module and the polarization module are directly and compactly integrated by utilizing the macro imaging module, so that the space coupling distance can be reduced, and the imaging quality can be effectively improved; the diffraction spectrum lens module realizes time-sharing spectrum regulation and control through the electronic control rheological lens module, and the polarization module performs area array space division polarization regulation and control, so that 0-degree, 45-degree, 90-degree and 135-degree polarization information under different spectrum channels can be directly obtained, the absorption effect of traditional light filtering on spectrums is avoided, the energy utilization rate is improved, and the energy consumption is reduced. And the number of polarization regions can be reduced, and the regulation and control precision is improved.

The invention discloses a lunar resource in-situ exploration-while-drilling device and method. The lunar resource in-situ exploration-while-drilling device is composed of a spiral drilling tool, an illumination light source module, a polarization spectrum detection module and a dual-channel spectrum measurement module. The drilling tool drill rod is of a hollow structure. Light emitted by the illumination light source module is collimated and depolarized to form unpolarized parallel light to irradiate lunar soil on the side wall of the drill hole, and the polarization spectrum measurement probe collects reflected light of the lunar soil; the reflected light is collimated by a front collimator objective of the probe and then sequentially passes through a spectrum modulation unit consisting of an achromatic 1 / 4 wave plate, a multi-stage wave plate, a beam splitter prism and two polaroids of which the light transmission directions are vertical to each other, and two orthogonal light beams are formed, so that polarization information of the reflected light is modulated in a spectrum dimension; demodulating the modulated spectrum to obtain the spectrum and polarization information of the lunar soil reflected light; and the resource distribution and content and the physical characteristics of the original lunar soil are inversed by using the polarization spectrum characteristics of the lunar soil. According to the invention, in-situ exploration of lunar subsurface depth profile mineral resources can be realized.

The invention relates to the technical field of rubber performance evaluation, in particular to a performance data analysis and evaluation method for a rubber material. The method comprises the following steps: acquiring X-ray scanning data of a rubber sample; performing phase contrast imaging on the X-ray scanning data of the rubber sample to obtain projection data of the rubber sample; performing back projection reconstruction on the projection data of the rubber sample to obtain three-dimensional structural data of the rubber material; carrying out multi-parameter environmental simulation loading on the rubber sample to obtain environmental response data of the rubber material; dynamically collecting the environmental response data of the rubber material to obtain deformation process data of the rubber material; synchronously recording and analyzing the deformation process data of the rubber material to obtain a stress-strain characteristic pattern of the rubber material; and performing polarization spectrum excitation on the rubber sample based on the rubber material stress-strain characteristic pattern to obtain rubber molecular chain fluorescence data. According to the invention, the reliability and accuracy of rubber material performance evaluation are improved.

The invention discloses a polarization spectrum modulation type multispectral stereo imaging method which solves the problem that in the prior art, an existing polarization spectrum imaging scheme does not achieve three-dimensional reconstruction of a target and achieves the purpose that the three-dimensional reconstruction of the target is not achieved under the condition that active illumination or special marks are not needed. Synchronous high-precision reconstruction of physical attributes and three-dimensional geometry of the surface of the target is realized; the method comprises the following steps: uniformly modulating polarization information and spectral information of incident light of a target through a three-way optical filter and a polaroid to obtain modulated incident light information; performing aliasing acquisition of a plurality of polarization spectrum components on the modulated incident light information through a multi-color detector combination to obtain aliasing light intensity; performing linear solution on the aliasing light intensity to obtain each polarization spectrum component vector, calculating the polarization degree and the polarization angle of each channel, and further deriving a surface zenith angle and an azimuth angle; reconstructing the three-dimensional morphology of each spectrum channel through normal gradient field frequency domain integration; and finally, fusing the multi-spectral three-dimensional data to obtain a multi-spectral three-dimensional imaging result.

The invention discloses an intermediate infrared polarization spectrum imaging method and device. The method comprises the following steps: carrying out joint coding on an intermediate infrared light beam carrying to-be-measured target space, spectrum and polarization information by adopting an intermediate infrared polarization spectrum modulator consisting of metasurface units which are arranged in an array and have non-correlation response characteristics; projecting the coding light field to a two-dimensional detector array to generate a two-dimensional coding image under single exposure; and decoding the two-dimensional coding image through a reconstruction unit so as to reconstruct and obtain a space-spectrum-polarization four-dimensional data cube of the target to be measured. The problem that polarization information cannot be rapidly obtained in the prior art is solved, target full information can be obtained under single exposure, and the system has the advantages of being high in imaging speed, simple in structure, easy to miniaturize and the like.

The invention relates to a polarization spectrometer, in particular to a pitch-adjustable polarization spectrometer based on cholesteric cellulose chiral liquid crystal. The polarization spectrometer is prepared by adopting the following method: step 1, regulating and controlling the screw pitch of cholesteric cellulose chiral liquid crystal; step 2, preparing a flexible PDMS film; step 3, preparing a patterned PDMS through hole film; 4, treating the surface of the glass sheet; step 5, filling cholesteric cellulose chiral liquid crystals; and step 6, orienting the cholesteric cellulose chiral liquid crystal to obtain the pitch-adjustable polarization spectrometer with the film-shaped patterned cholesteric cellulose chiral liquid crystal. The problems that a traditional small-molecule liquid crystal chiral agent is difficult to regulate and control the screw pitch of the cholesteric phase cellulose chiral liquid crystal and easy to agglomerate can be solved, and simple preparation of the screw pitch-adjustable cholesteric phase cellulose chiral liquid crystal is achieved; and meanwhile, transmission of right-handed circularly polarized light and selective reflection of left-handed circularly polarized light are realized by utilizing the patterned cholesteric cellulose chiral liquid crystal.

The invention provides a video-level polarization spectrum imaging system and method. The system comprises an imaging unit, a polarization spectrum coupling unit, a data processing unit and an output unit, the imaging unit is used for imaging a target object on an imaging plane; the polarization spectrum coupling unit comprises a multi-channel spectrum modulation diaphragm and a micro-polarization focal plane array; the multi-channel spectrum modulation diaphragm is used for dividing incident light into a plurality of different spectrum channels; the micro-polarization focal plane array is used for converting the spectrum modulation light into polarized light of a plurality of different angles; the data processing unit is used for fusing the spectral information, the polarization information and the pixel information into multi-dimensional polarization spectral data; and the output unit is used for transmitting the polarization spectrum data to a computer. The system obtains spectrum information through a spectrum modulation diaphragm so as to distinguish the material composition and the chemical property of a target object; according to the system, polarization imaging is carried out through the micro-polarization focal plane array, and the detectability and the recognition rate of a target object can be improved.

The invention discloses a high-robustness demosaicing bilinear interpolation method for polarization hyperspectral imaging, relates to the field of polarization spectral imaging, and solves the problems that in the prior art, when an optical system is located on a platform, vibration occurs, frames of collected images are lost, and spectrum aliasing exists in the optical system. The method comprises the following steps: collecting a group of polarized hyperspectral images, and carrying out high-robustness demosaicing reconstruction on the collected group of polarized hyperspectral images; the image I is recorded as the image of the obtained Kth spectral band, and the mosaic image II is an empty matrix and is used as an interpolation space of the image I; performing assignment on the mosaic image II in the horizontal direction; filling by using boundary conditions to complete interpolation in the horizontal direction; extracting polarization channel intensity images in four different directions in the mosaic image II, and performing vertical direction interpolation on the polarization channel intensity images; and polarization demosaicing reconstruction of the Kth spectral band image is completed. The method is suitable for the field of suppressing image artifacts generated in reconstruction.

The invention discloses a seed vigor detection device based on a polarization spectrum technology, which comprises a large-stroke electric control mobile platform, a black paperboard, a seed sample, a halogen light source, a polarizer, a lens, a hyperspectral sorter, an analyzer and a computer, and all the parts are arranged in a camera obscura; the light emitted by the halogen light source is reflected by the polarizer and the seed sample, reaches the lens and is captured by the hyperspectral sorter; the invention also provides a detection method which comprises the following steps: firstly, collecting spectral data; carrying out image analysis; preprocessing the polarization spectrum data, performing competitive adaptive reweighting algorithm dimension reduction, and selecting a characteristic wavelength; finally, establishing a seed vigor detection model, fusing ideal modeling methods by adopting Blending ensemble learning, and carrying out hybrid modeling on the grain seeds; the polarization hyperspectral technology is introduced into the field of seed vigor detection, the seed vigor detection precision is improved, and rapid and nondestructive detection of the soybean seed vigor is achieved.

The invention provides an all-day water body circular polarization hyperspectral measurement method and device. The method provided by the invention comprises the following steps: respectively transmitting circularly polarized white light and linearly polarized white light to a first spectrograph and a second spectrograph, constructing a first equation based on the received circularly polarized white light information, and constructing a second equation based on the received linearly polarized white light information; solving a first correction coefficient and a second correction coefficient by combining the first equation and the second equation; emitting a circular polarization white light source above the horizontal plane of the water area to be detected, receiving scattered light information of substances in the water area to be detected, and correcting the received scattered light information based on a first correction coefficient and a second correction coefficient; and searching and determining target substance attributes corresponding to the actually measured circularly polarized light spectrum curve based on the actually measured circularly polarized light spectrum curve and the circularly polarized light spectrum curve standard library. The all-day water body circular polarization hyperspectral measurement method and device provided by the invention are used for realizing all-day water body circular polarization hyperspectral accurate detection.

An apparatus and method of determining the concentration of first and second substances within a sample by exposing the sample to radiation and filtering the radiation transmitted from the sample using a first filter having a number of pass bands at wavelengths corresponding to absorption peaks in a desired quasi-periodic absorption spectrum of the first substance to be detected, and modulating the wavelengths of the pass bands of the first filter. Additionally, filtering the radiation transmitted from the sample using a second filter having a number of pass bands at wavelengths corresponding to absorption peaks in a desired quasi-periodic absorption spectrum of the second substance to be detected, and modulating the wavelengths of the pass bands of the second filter. The concentration of the first and second substances is determined by determining the difference in the maximum and the minimum intensities of the radiation transmitted by the sample.

The invention relates to the technical field of optics, in particular to a low-crosstalk channel modulation interference polarization spectrum detection method and system, and the system comprises a half-field telescopic module, a phase modulation module, an interference modulation module and a detection module. The half-view-field telescope module is used for performing lower half-view-field beam collimation on an input target beam, the target beam is propagated to the phase modulation module in parallel according to a set range, a composite polarization splitting prism group in the phase modulation module performs light splitting operation based on the target beam output by the half-view-field telescope module, and two parallel polarized lights are emitted, independent phase modulation of the two paths of light is ensured; and the interference modulation module is used for performing light splitting modulation according to the two paths of polarized light to ensure that the two paths of modulated polarized light beams interfere with each other and are transmitted to the detection module for imaging. According to the system, the detection precision of a narrow-band polarization spectrum or a polarization spectrum with an obvious narrow-band wave crest and a narrow-band absorption peak is improved, the polarization spectrum detection capability is high, and the application range is wide.

The invention discloses a road intelligent diagnosis method based on an AI large model, and relates to the technical field of road engineering detection, and the method comprises the following steps: building a unified time base line, constructing a phase reference field, injecting a calibration pulse, separating dynamic shadow time sequence texture and crack initial features in a road image sequence, and obtaining a road image sequence; generating prior information of dynamic shadows and cracks; under the constraint of prior information, polarization spectrum three-dimensional coding imaging is carried out, polarization angle distribution and spectrum gradient are extracted, a feature dictionary of dynamic shadows and cracks is constructed, and phase drift in the prior information is calibrated. According to the method, a unified time base line and a phase reference field are constructed, and accurate distinguishing of dynamic shadows and cracks is realized by combining polarization spectrum imaging and anti-fact distillation; the point cloud and acceleration data are fused for geometric reconstruction, and through phase conjugate extinguishing and closed-loop feedback, the continuity and accuracy of diagnosis are significantly improved, and maintenance error decisions caused by misjudgment are avoided.

The invention relates to the technical field of micro-nano optics, and particularly provides a detection metasurface, a spectral polarization detection method and a construction method of the metasurface. The detection metasurface comprises a substrate and dielectric cylinders arranged on the surface of the substrate. Wherein the phase parameter of the dielectric cylinder meets a preset detection condition; the preset detection condition comprises that the positions of the light with different wavelengths or / and different polarization states on the focusing focus of the focal plane are different. Because the phase parameter of the dielectric cylinder meets the preset detection condition, incident light with different wavelengths or / and different polarization states can be focused at different positions of a focal plane based on the detection metasurface, and then spectral information and polarization information contained in the incident light are determined based on the position and light intensity of a focusing point. Therefore, spectrum information and polarization information can be obtained in real time through single detection based on the detection metasurface, real-time polarization spectrum detection is achieved, the information obtaining dimension is improved, and meanwhile the detection efficiency and the dynamic object detection capacity are improved.

To provide a polarized spectral image capturing device capable of capturing two spectral images with one of the Stokes parameters S1, S2, and S3 and the Stokes parameter S0, and acquiring a polarized spectral image specific to an object.SOLUTION: A polarized spectral image capturing device is provided, comprising a polarization diffraction grating for diffracting and separating orthogonal polarization components of light under measurement, a spectral camera configured to simultaneously capture spectral images of the light under measurement separated into orthogonal polarization components, and an information processing unit for information processing of the spectral images.SELECTED DRAWING: Figure 6

A dispersion-based non-local polarization and spectral high-dimensional photoelectric detector. Incident light is modulated by a spatial light modulation module and then irradiates a non-local dispersion device (5) in the form of a specific spatial light field. Because of different polarization states and spectrums of the light in the spatial light field, the spatial light field that has passed through an angular channel generation component (4) irradiating the non-local dispersion device (5) will generate a corresponding transmitted intensity distribution; a light receiving module (6) images the transmitted intensity distribution; an information analysis module (7) analyzes the transmitted intensity distribution, and outputs high-dimensional intensity, polarization and spectral information of the incident light. The present application can detect with high precision high-dimensional light information of which the polarization state and the intensity vary with wavelengths, and acquire accurate intensity, polarization and spectral information only by a single measurement of a single detector, breaks through the detection dimension of conventional methods, reduces the complexity and measurement time costs of existing polarization and spectral imaging systems, and is significant for miniaturization and lightweightness of the polarization and spectral imaging systems.

The utility model provides a circular polarization steady-state and transient-state detection system, and the system comprises a microscopic imaging assembly which is used for carrying out the microscopic imaging of a to-be-detected sample, determining the position of the sample, and guaranteeing the precise irradiation of laser on the region of the to-be-detected sample; the steady-state circular polarization spectrum detection assembly is used for spectrum detection of steady-state circular polarization light emission of the sample; and the transient circular polarization dynamics detection assembly is used for ultrafast process detection after transient circular polarization light excitation of the sample. The device can detect the steady-state and transient spectrum and service life of a material under the excitation of circularly polarized light, reflect the steady-state and transient properties, including optical properties and carrier dynamic properties, of the material, and is integrated with a microscopic imaging system, so that a to-be-detected sample area can be microscopically imaged to distinguish a material area, and laser is ensured to accurately irradiate the to-be-detected area.

The application provides a satellite-borne multi-viewing-angle polarization spectrum imaging system for aerosol optical parameter measurement, and belongs to the technical field of optical imaging. The system is loaded on a satellite platform and comprises a telescope objective, a multi-slit assembly, a light-splitting prism, a collimating lens group, a plane grating group, an imaging lens group, a depolarization light-splitting prism group, a polaroid group and a detector group. The system is based on static multi-viewing-angle synchronous observation design, and realizes high-precision detection of aerosol optical parameters through multi-viewing-angle, hyperspectral and full-polarization multi-dimensional information fusion.

The application relates to the field of spectrum measuring instruments, in particular to a circularly polarized spectrum measuring instrument capable of synchronous adjustment, which comprises an angle table installed on the surface of a base, an input box and a receiving box installed on the angle table near the center line on both sides, laser emitters and receiving plates respectively installed on one side of the input box and the receiving box, input polarizers and receiving polarizers respectively installed in the input box and the receiving box for emitting and receiving circularly polarized light, and a detection table arranged on the surface of the base and used for bearing a detected object. Laser emitters and receiving plates respectively arranged on one side of the input box and the receiving box are used for separately detecting incident and outgoing angles, the incident and outgoing angles of polarized light are simulated before sample detection, synchronous adjustment of the input polarizer and the receiving polarizer is carried out, the detection automation degree of the circularly polarized spectrum measuring instrument is further improved, and the detection efficiency is improved to a certain extent.

The application discloses a kind of full polarization spectral imaging device and detection method, contain sequentially arranged polarization modulator, imaging spectrometer, data acquisition processing display system to incident light;Polarization modulator is single fixed retarder and single fixed linear polarizer sequentially arranged along incident light, can carry out spectral modulation to full stokes parameter, it has the superiority of simple, ultra-compact, miniaturization, anti-system error in structure.By constructing complete imaging physical model or constructing imaging physical model based on compressed sensing, then using untrained artificial neural network realizes the full stokes parameter image reconstruction under each narrow waveband, and the deep neural network of "black box operation" is endowed with physical meaning.The reconstructed polarization spectral resolution can be consistent with the resolution of the imaging spectrometer used;And it has the characteristics of strong anti-noise ability, so as to ensure high-quality reconstruction.

The invention discloses a wine quality AI visual detection method, and relates to the technical field of wine quality detection. The method comprises the following steps: pretreating a wine sample; polarization spectrum images in different wave bands and different polarization directions are collected through a multispectral polarization imaging system and preprocessed; segmenting a microorganism region based on a polarization degree threshold, and extracting polarization spectrum feature vectors of microorganisms; extracting morphological feature vectors of the microorganisms; fusing the two feature vectors to construct a feature fusion matrix, and inputting the feature fusion matrix into an improved attention mechanism convolutional neural network model for training to obtain a wine quality AI detection model; after a sample to be detected is processed, the model is input to obtain a quality index predicted value, and quality grade judgment is achieved. According to the invention, the multispectral polarization imaging technology and microbial morphological characteristic analysis are combined, the anti-interference capability is strong, the detection precision and efficiency are high, the rapid, lossless and accurate detection of the wine quality is realized, and the practical value is high.

The invention discloses a high-speed polarization spectrum detection system, which is used for simultaneously realizing spectrum measurement and polarization measurement on visible light and near-infrared spectrum bands of a target in a target collision process so as to carry out damage evaluation on the target. The optical antenna collects a visible spectrum optical signal and a near-infrared spectrum optical signal of a target, and the visible spectrum optical signal and the near-infrared spectrum optical signal are respectively divided into two paths and respectively enter the spectrum detection module and the polarization detection module; the spectrum detection module is used for performing spectrum measurement on the incident light beams to obtain visible spectrum section spectrum information and near-infrared spectrum section spectrum information; the polarization detection module carries out polarization state modulation and polarization measurement on an incident light beam to obtain visible spectrum polarization information and near-infrared spectrum polarization information. And the servo turntable receives target azimuth information and controls the detection system to point to a target area.

The invention belongs to the field of polarization measurement, and particularly relates to a space solar spectrum magnetic field telescope based on multi-wave-plate polarization modulation, which comprises a telescope system, a relay system and a spectrum imaging system, the telescopic system comprises a first 1 / 2 wave plate, a 1 / 4 wave plate and a second 1 / 2 wave plate; when neither the first 1 / 2 wave plate nor the second 1 / 2 wave plate fails, the second wave plate is kept static, and the first wave plate and the third wave plate rotate in the same direction according to a preset different-speed asynchronous motion time sequence, so that the full-stokes component of the solar polarization spectrum is measured; when any one of the first 1 / 2 wave plate and the second 1 / 2 wave plate breaks down, the 1 / 4 wave plate is started, and the 1 / 4 wave plate and the other normally working 1 / 2 wave plate rotate in the same direction according to the re-planned different-speed asynchronous motion time sequence, so that the measurement of the full stokes component of the solar polarization spectrum is maintained. According to the invention, full Stokes measurement can be realized, and the blank of space solar vector magnetic field detection capability in China is filled.

The present invention proposes a single-exposure hyperspectral imaging system based on intensity-polarization combined modulation mask and its detection method, comprising an excitation light source group, a compression acquisition module, a reconstruction module, and a polarization noise reduction module. The excitation light source group generates linearly polarized light to illuminate the object under test, causing it to produce photoluminescence or Raman scattering. The compression acquisition module receives the signal and completes the compression acquisition. The reconstruction module uses a deep learning algorithm to reconstruct the full polarization spectrum image data from the compressed observation image. The polarization noise reduction module removes the mirror reflection noise component and outputs the noise-reduced photoluminescence or Raman scattering hyperspectral image data. The present invention can quickly and stably complete photoluminescence and Raman scattering spectral imaging, improve material detection efficiency and signal-to-noise ratio, and is suitable for fields such as semiconductor detection.

This application relates to the field of optical polarization measurement technology, specifically to a wide-spectrum, high-bandwidth static spectral modulation Stokes polarization measurement device, comprising a polarization modulation module, a spectral sampling module, and a high extinction ratio polarizer. The polarization modulation module includes a phase retarder and a linear polarizer; the spectral sampling module has sub-nanometer spectral resolution; the high extinction ratio polarizer includes a halogen tungsten lamp and a Glan Taylor prism for generating high-purity linearly polarized light; the obtained demodulation factor and the modulation spectrum acquired by the spectral sampling module are used to invert the Stokes parameters using zero-heterodyne coherent demodulation technology. This application employs a phase retarder with high birefringence, which, for the same thickness, produces an optical path difference tens of times greater than that of quartz, increasing the Stokes polarization measurement bandwidth by a factor of the response and improving the measurement accuracy of polarization spectral parameters. Simultaneously, the zero-heterodyne coherent demodulation method is used to eliminate the dispersion interference of the phase retarder through calibration.

The invention discloses a circular polarization spectrometer and a spectrum analysis method thereof, and relates to the technical field of circular polarization spectrum analysis. A chiral structure layer of a circularly polarized photoelectric detector of the circular polarization spectrometer comprises a left-handed chiral structure array and a right-handed chiral structure array which are independent from each other and are in mirror symmetry, and a photosensitive layer comprises a first photosensitive unit and a second photosensitive unit. The first photosensitive unit is electrically connected with the first signal detection module through the first electrode group, the second photosensitive unit is electrically connected with the second signal detection module through the second electrode group, and the circularly polarized photoelectric detector is used for collecting a left-handed response current signal and a right-handed response current signal under monochromatic light with the same wavelength; and the circular polarization spectrometer calculates the left-hand circularly polarized light intensity and the right-hand circularly polarized light intensity according to a formula. The circular polarization spectrometer can synchronously and quantitatively separate left-handed and right-handed circularly polarized light on a monochromatic wavelength point, and the device stability and the process compatibility are high.

The invention relates to a polarization spectrum imaging technology, in particular to a high-energy-efficiency stacked integrated polarization spectrum modulator and a preparation method thereof, and a polarization spectrum imaging system and method, and solves the technical problems that an existing polarization spectrum imaging system is low in measurement efficiency, high in loss, large in size and complex to regulate and control. The high-energy-efficiency stacked integrated polarization spectrum modulator is formed by sequentially stacking the polarization unit, the dynamic modulation layer and the spectrum unit, an additional modulator is adopted to directly control the polarization modulation layer and the spectrum modulation layer of the dynamic modulation layer to achieve fine modulation of polarization information and spectrum information, the size is small, and the regulation and control method is simple; each micro-area of the polarization unit and the spectrum unit adopts a beam splitting structure, so that the energy loss is relatively low; a polarization modulation layer and a spectrum modulation layer of the dynamic modulation layer are respectively located at two sides of the conductive base layer, can be independently controlled, are respectively and directly connected with each micro-area of the polarization unit and the spectrum unit, and can respectively realize cooperative control of polarization information and spectrum information.

The present invention relates to a polarization spectrum video compression acquisition system, which belongs to the field of computational imaging; it includes a lens group, a spatial coding random modulation module S1, a spectral dispersion modulation module S2, a pixel polarization detector module S3 and a high-precision polarization spectrum data reconstruction module S4; the present invention can realize efficient compression acquisition and reconstruction of multi-dimensional light field data containing polarization information, spectral information and spatial information. Polarization spectrum information in a scene can be compressed and acquired by a single exposure, polarization spectrum information of 4 polarization angles can be acquired by a high-precision compressed sensing reconstruction algorithm, and polarization spectrum video acquisition can be realized in a continuous sampling mode. The present invention can reduce the complexity of system hardware, and has the characteristics of low data acquisition volume and efficient acquisition of high-resolution polarization spectrum video.

The present invention discloses a polarization spectrum automatic frequency stabilization method based on a dynamic time planning adjustment algorithm, which is characterized in that the polarization spectrum curve is collected to obtain sample data, and the DTW algorithm threshold is set; the FPGA generates a triangle wave and a DC level of a certain amplitude and frequency to scan the PZT; during the scanning process, the current polarization spectrum curve is compared with the sample data to determine whether the DTW algorithm result is lower than the threshold; when it is lower than the threshold, the current triangle wave and DC level state are maintained, and when it is higher than the threshold, the DC level is continuously increased to repeat the previous step; the midpoint position of the edge to be locked of the current frequency discrimination curve is read, and the DC level is changed to adjust to the midpoint of the scanning signal corresponding to the midpoint position of the locking edge; the triangle wave access feedback signal is removed to complete the frequency locking. Compared with the prior art, the present invention enables the system to achieve frequency stabilization in a short time, and provides a stable frequency-stabilized laser light source for devices such as laser interferometers.