454 results about "Light extinction" patented technology

The invention discloses a stray light gray value acquisition method, an automatic focusing processing method and an automatic focusing processing system, and relates to the field of automatic focusing. The method is applied to the microscopic automatic focusing device, and comprises the following steps: adjusting the distance between a microscope objective and a reflection point corresponding to light passing through the microscope objective, or the reflection angle of the light, so that the adjusted distance or reflection angle exceeds the focusing range of the microscope objective; or an extinction assembly is additionally arranged on the outer side of the microscope objective, so that the light penetrating through the microscope objective is eliminated; theoretical light spot areas formed by stray light on the surface of the first sensor at different axial height positions of the microscope objective are calculated; and gray values corresponding to theoretical light spot areas in the actual light spot images of the microscope objective at different axial height positions are extracted and used for correcting the light spot image of the object to be measured, so that the influence of stray light on a defocusing amount calculation result is reduced. Therefore, the influence of stray light reflected by the surface of the microscope objective on the defocusing amount calculation is reduced, and the accuracy of the defocusing amount calculation is improved.

The invention discloses a near-infrared flexible polarized photoelectric detector and a preparation method thereof. The photoelectric detector comprises an Sb2Se3 micron wire, a PET flexible substrate, a metal Ag electrode, a silver wire and polydimethylsiloxane (a PDMS mixture). According to the preparation method, an effective metal-semiconductor-metal (M-S-M) structure is constructed by combining the Sb2Se3 micron wire and the Ag electrode, curing packaging is carried out by adopting a PDMS mixture, the incident light transmittance is improved, meanwhile, the response speed of a device can be greatly improved through ohmic contact formed by the micron wire and the Ag electrode, and the power loss of the device is remarkably reduced. Compared with the prior art, the detector provided by the invention still keeps a stable and high extinction ratio under mechanical bending deformation, and realizes sensitive polarization, quick response and stable performance of a near-infrared band at the same time.

The invention discloses a magnesia carbon brick automatic detection method based on a laser sensor, and the method comprises the following steps: A1, carrying out the multi-angle scanning of the surface of a magnesia carbon brick through a line laser scanner, and generating high-precision three-dimensional point cloud data; a2, inhibiting graphite reflection interference on the surface of the magnesia carbon brick by adopting a polarization filtering system, and compensating a temperature drift error in real time by fusing an infrared thermometer; and step A3, preprocessing the point cloud data through GPU accelerated parallel computing. The invention relates to the technical field of magnesia carbon brick detection. According to the magnesia carbon brick automatic detection method based on the laser sensor, a polarization extinction technology and a multi-source interference compensation mechanism are fused, the problem of high-reflection surface data acquisition distortion is solved, the point cloud integrity is ensured, interference factors such as production line vibration and dust are actively inhibited, and the detection stability is ensured.

The invention relates to the field of performance testing of high-precision fiber-optic gyroscopes, and discloses an automatic testing method and system for the extinction ratio of a high-precision fiber-optic gyroscope, and the method comprises the following steps: constructing a signal light path and a reference light path, and combining the output light of the signal light path and the reference light path into a combined light signal in an orthogonal polarization state; integrally measuring the extinction ratio of the combined optical signal by using an extinction ratio tester to obtain a measured value; the control unit compares the measured value with a target value of 0dB and generates a control instruction based on a difference value; the voltage controller automatically adjusts the voltage of the integrated optical modulator in the signal light path according to the instruction, and iterative optimization is carried out through closed-loop feedback until the actually measured extinction ratio reaches a target value; and finally recording and solidifying the optimal voltage value. According to the invention, single and accurate extinction ratio overall measurement is used for replacing two times of error-prone independent optical power measurement, full-automatic closed-loop control is realized, the precision, efficiency and consistency of optical power balance are remarkably improved, and the skill requirements on operators are reduced.

The invention discloses a medical endoscope with an extinction anti-pollution structure, and relates to the technical field of endoscopes, the medical endoscope comprises an endoscope main body, the front end of the endoscope main body is provided with a camera module, and the periphery of the camera module is provided with an illumination light source for illumination, an outer sleeve and an extinction structural member; a hollow observation opening is formed in the center of the endoscope body in a penetrating mode, a light blocking sinking table used for blocking front direct light beams emitted by the illumination light source is arranged outside the hollow observation opening in a surrounding mode, and a deflection bevel edge used for diffraction deflection of light rays emitted by the illumination light source is further arranged outside the light blocking sinking table. Through the synergistic effect of physical shielding of the light blocking sinking table and diffraction deflection of the deflection bevel edge, front-side direct stray light of the illumination light source is cut off from the source, side-emitting and oblique-emitting light rays are deflected in a targeted mode, light spot and light fog pollution caused by diffuse reflection of the front end of a transparent guide sheath or a catheter is remarkably eliminated, and the imaging definition is remarkably improved.

The spherical four-glued prism is formed by gluing and connecting three triangular prisms and a curved prism, each gluing surface is plated with a functional film, each non-gluing surface is plated with an anti-reflection film, the outer diameter position of the curved prism is coated with black extinction paint, and the outer diameter position of the curved prism is coated with the black extinction paint. The curved prism can be arranged on any side of the three triangular prisms; the processing technology of the spherical four-cemented prism comprises the following steps: 1) preparing a light blank; 2) plating a first light splitting film, combining, polishing, plating a second light splitting film, combining and polishing in sequence; the method comprises the following steps of (1) preparing a curved prism, (2) cutting the curved prism to form a green body with a specified size, (3) cutting to form a green body with a specified size, (4) pasting an auxiliary lens, (5) processing a spherical surface, (6) removing the auxiliary lens, and (7) plating an antireflection film on the spherical surface, and coating the outer diameter of the curved prism with black matting paint The prism prepared by the method is compact in structure, excellent in performance, high in processing precision and small in gluing deviation, and can realize low-cost and batch production and universalization of a jig at the same time.

The invention relates to a laminated staggered sub-wavelength polarization grating structure and a preparation method thereof, through staggered arrangement of a first metal grating layer and a second metal grating layer, transmission of polarized light of a transverse electric field can be effectively inhibited, and the extinction ratio is remarkably improved. Through the substrate, the first dielectric layer, the second dielectric layer, the first metal grating layer, the third dielectric layer and the second metal grating layer which are sequentially arranged from bottom to top, the whole device obtains a higher extinction ratio while keeping high transmittance, the overall structure is simple, the processing difficulty and cost are reduced, and the production efficiency is improved. And the number of the used dielectric layers and metal layers is small, the thickness requirement is low, and therefore it is ensured that the cost is controllable.

The invention relates to the technical field of atmospheric transmission characteristics, and provides a method for acquiring atmospheric transmittance in haze weather, which comprises the following steps of: acquiring a mixed composition ratio of a plurality of preset haze particle groups forming a preset aerosol type, and acquiring diameters and complex refractive indexes of a plurality of wet haze particles contained in the plurality of preset haze particle groups; and determining the extinction efficiency factor of each wet haze particle according to the diameter and the complex refractive index. And determining the total extinction coefficient of the preset aerosol type according to the particle distribution function of the preset aerosol type, the mixing composition ratio and the extinction efficiency factors corresponding to the plurality of wet haze particles. According to the total extinction coefficient, the atmospheric transmittance is calculated through an atmospheric transmittance calculation function. The calculation of the atmospheric transmissivity is carried out based on the diameter and the complex refractive index of the wet haze particles, and the influence of the preset aerosol type composed of the plurality of preset haze particle groups on the calculation of the atmospheric transmissivity is considered, so that the calculation accuracy of the atmospheric transmissivity is improved.

The invention discloses an automatic adaptation method and device for an optical module and a switch, the optical module, a medium and a product, and relates to the technical field of optical communication, and the method comprises the steps: determining a port connected with the switch, recognizing a port identifier of the port, and querying a target voltage optical modulation amplitude value corresponding to the port identifier according to a preset mapping table; acquiring a current temperature value, and inputting the target voltage light modulation amplitude and the current temperature value into a preset fitting function to obtain target light power; and laser is emitted to the outside based on the target optical power, so that the extinction ratios of the laser at different ports and different temperatures are consistent. The adaptability and the performance stability of the optical module are improved.

The invention discloses a polarization sensitive type broadband absorber based on metal-medium stacking, and relates to the technical field of micro-nano photonic devices and infrared detection. The absorber sequentially comprises a bottom-layer high-loss metal reflecting layer, a multi-layer stacked composite dielectric cavity structure and a top-layer sub-wavelength metal grating from bottom to top, according to impedance matching and interference resonance theories, a broadband absorption substrate is constructed through a multi-layer film structure at the bottom, and light energy is converted into heat energy by utilizing the high loss characteristic of bottom layer metal; plasmon resonance is excited through the top metal grating, the coupling efficiency of TM polarized light is enhanced, and TE polarized light is cut off; the above structural design successfully realizes efficient broadband absorption and high polarization extinction ratio in an infrared band. The structure is simple in design, is compatible with a CMOS technology, and has excellent wide-angle stability. And meanwhile, polarization screening can be realized without an external polaroid, and miniaturization and integration of an infrared detection system are facilitated.

The utility model relates to the technical field of vehicle lamps, and provides a small-opening module gradually-changing type lens extinction structure, a vehicle lamp and a vehicle, n multi-order sawtooth patterns with different designs are sequentially arranged on the side walls of the two sides of a lens in the direction from back to front respectively, each multi-order sawtooth pattern comprises a side wall light emitting surface YnXn-1 and a sawtooth surface XnYn which are sequentially connected from back to front, each sawtooth surface XnYn is provided with a plurality of side wall reflecting surfaces with gradually-changed inclination angles, and the inclination angles of the plurality of side wall reflecting surfaces are gradually increased from back to front. By adopting the multi-step sawtooth pattern structure, a single total reflection surface is designed into a plurality of different surfaces and is designed into the structure with the gradient inclination angle, so that the total reflection probability of light rays is increased, missing stray light is prevented from passing through the light-emitting surface of the lens, the stray light elimination efficiency is increased, the occupied space is small, and the lens is more attractive.

The invention discloses an extinction ratio measurement system and an extinction ratio measurement method, and relates to the technical field of optical module extinction ratio measurement. The transimpedance amplification circuit is connected with the optical module to be measured and used for monitoring the optical signal intensity of the optical module to be measured and obtaining a power monitoring voltage signal; decomposing the optical signal of the optical module to be tested to obtain a reference voltage signal and a test voltage signal; the linear output circuit is connected with the transimpedance amplification circuit and used for carrying out linear amplification on a difference value between the reference voltage signal and the test voltage signal to obtain a modulation amplitude voltage signal; and the processing circuit is respectively connected with the transimpedance amplification circuit and the linear output circuit, and is used for determining the light modulation amplitude according to the ratio of the power monitoring voltage signal to the modulation amplitude voltage signal, and determining the extinction ratio of the optical module to be detected according to the light modulation amplitude and the light power corresponding to the power monitoring voltage signal. The measurement cost of the extinction ratio of the optical module can be reduced.

An integrated configurable photodetector with an ultra-high circular polarization extinction ratio and a preparation method therefor are provided. The photodetector includes a metal reflective layer, a dielectric layer, an electrode layer, and a two-dimensional material layer. The electrode layer includes symmetrically arranged Z-shaped metallic optical antenna arrays which are respectively integrated with a source electrode and a drain electrode and have opposite chirality. The photodetector operates at zero bias state, and a photo-response is photovoltaic effect, hot electron injection, photo-thermoelectric effect and so on induced by a Schottky junction composed of the source electrode, the drain electrode and the two-dimensional material. By adjusting the distribution of the incident light in the source and drain electrode regions, under specific Circularly polarized light, photocurrents of equal magnitude but opposite directions cancel each other out, resulting in a net output of zero and significantly reducing noise.

The invention relates to the technical field of optical communication, and provides a polarization separation rotator and optical communication equipment. The polarization separation rotator comprises an input coupling waveguide, a ridge waveguide and a separation waveguide, and the input coupling waveguide, the ridge waveguide and the separation waveguide are sequentially arranged in the light propagation direction; the input coupling waveguide is used for coupling an input optical signal to the ridge waveguide, and the input optical signal comprises two polarization modes; the vertical section of the ridge waveguide is in a step shape to form a vertical asymmetric structure, and the vertical section is perpendicular to the light propagation direction. And the separation waveguide is used for separating the optical signals in the two polarization modes so as to respectively transmit the optical signals to different output ports. According to the polarization separation rotator provided by the invention, the defects that the size is difficult to further reduce and the polarization extinction ratio is reduced in the prior art are overcome, efficient polarization mode hybridization is realized by increasing the asymmetry in the vertical direction, and miniaturization of the polarization separation rotator is facilitated.

The invention discloses a light source system capable of continuously adjusting an attenuation ratio, and belongs to the technical field of optical radiation measurement and photoelectric detection. In order to solve the problems of wavelength dependence, discontinuous adjustment, spectrum distortion and the like existing in an existing light intensity adjusting scheme, a combined structure of an integrating sphere and a diaphragm cylinder is adopted, and the device comprises a light source, the integrating sphere with the high-reflection inner wall, a front-end adjustable diaphragm, the diaphragm cylinder with the extinction inner wall and a rear-end adjustable diaphragm. Continuous attenuation of output light intensity in a predetermined dynamic range is realized by adjusting the apertures of the front and rear diaphragms, the lower limit of attenuation ratio meets the requirement, and the dynamic range can reach more than three orders of magnitude. The system uses the integrating sphere to form a stable Lambert light source, the attenuation process depends on geometric parameters, spectral distribution and spatial uniformity basically remain unchanged, and the non-uniformity of a light-emitting surface is not greater than 5%. The invention further provides a calibration method, high-precision attenuation prediction is achieved through detector measurement and view factor model fitting, and the calibration method is suitable for weak cursor calibration, detector linearity testing and other applications.

The invention relates to the technical field of phenotype measurement in aquatic genetic breeding, in particular to a macrobrachium rosenbergii small-size shrimp high-throughput phenotype measurement method and measurement system. According to the method, a camera obscura environment is constructed through a white shooting bottom plate, a dark extinction inner wall and an LED area array light source in a measuring box body, and illumination is adaptively adjusted by combining rough segmentation of a preview and analysis of a local gray histogram, so that stable bimodal gray distribution is formed between a shrimp body and a background. On the basis, a segmentation-key point combined deep learning model is adopted, a shrimp body mask and a standard key point are output at the same time, topological consistency loss constraints of a framework side length proportion and an included angle are introduced in training, and key point mismarking and drifting caused by the transparent body color are remarkably reduced. According to the method, rapid, non-contact, high-precision and high-throughput measurement of macrobrachium rosenbergii small-specification individual phenotype parameters and weight is realized, and a high-quality structured phenotype database is provided for genetic evaluation and multi-character combined selection.

The invention discloses a transmitting and receiving module of a laser radar, the laser radar and a movable platform. The transmitting and receiving module of the laser radar comprises a transmitting assembly and a receiving assembly. The extinction mechanism is used for eliminating stray light of an unexpected path; the fixed seat is internally provided with a spectroscope, the fixed seat is provided with four-direction light path channels facing different directions, a laser beam emitted by the emitting assembly enters the fixed seat through the first light path channel and is emitted out through the second light path channel after being reflected by the spectroscope, and the returned laser beam enters the fixed seat through the second light path channel; and after being transmitted by the spectroscope, the stray light is emitted from the third light path channel and then received by the receiving assembly, and the stray light of an unexpected path is emitted to the extinction mechanism through the fourth light path channel. The wide-spectrum or multi-angle stray light enters the extinction mechanism through the fourth light path channel which is arranged at an angle with the third light path channel, and then the stray light is eliminated by the extinction mechanism, so that the point cloud quality of the receiving assembly can be improved, and more accurate related information of an object in a target detection area can be obtained.

The invention relates to the technical field of optical communication, in particular to a silicon optical chip monitoring method and device, electronic equipment and a computer readable storage medium, and the method comprises the steps: obtaining an input monitoring value and an output monitoring value integrated by a silicon optical chip, the input monitoring value is an input optical power value collected by an input monitoring photodiode integrated with the silicon optical chip, the output monitoring value is an output optical power value collected by an output monitoring photodiode integrated with the silicon optical chip, and a power ratio parameter is calculated according to the input monitoring value and the output monitoring value; the power ratio parameter is compared with a preset ratio range, and when it is detected that the power ratio parameter is not in the preset ratio range, it is determined that the silicon optical chip has an optical extinction ratio abnormal risk; and outputting a detection result containing the risk that the optical extinction ratio is abnormal, so that the real-time performance of abnormal detection of the optical extinction ratio of the silicon optical chip is improved.

The utility model relates to a light trap structure for absorbing and inhibiting stray light in a laser communication system. The light trap structure comprises a cavity, a parabolic reflector and an extinction body, a first light inlet is formed in one end of the cavity, and the directrix plane of the parabolic reflector is parallel to the section of the first light inlet; the extinction body comprises a second light inlet, a central extinction cone, an edge extinction cone and a hollow diaphragm, the second light inlet is communicated with the interior of the extinction body and the cavity, and the section of the second light inlet and the directrix plane of the parabolic mirror are inclined by a certain angle; the second light inlet can receive light rays reflected by the parabolic reflector; the extinction body internally comprises a central extinction cone and edge extinction cones, wherein the edge extinction cones are symmetrically arranged on the two sides of the central extinction cone. According to the utility model, light rays can be absorbed once or multiple times, and the proportion of stray light escape energy is reduced to the greatest extent.

This invention discloses a bimetallic hybrid metasurface that achieves polarization-selective absorption and tunable liquid immersion. The metasurface consists of a three-layer structure: a bimetallic hybrid layer, a silicon dioxide layer, and a silver reflective layer. The bimetallic hybrid layer is composed of aluminum and titanium nanoribbons. The bimetallic hybrid metasurface achieves perfect absorption of incident light under x-polarized light at the resonant wavelength and specular reflection of incident light under y-polarized light, thus exhibiting a high extinction ratio. Furthermore, the absorption peak wavelength of the metasurface can be continuously and dynamically tuned by adjusting the unit period of the metasurface or by utilizing active tuning through liquid immersion. The bimetallic hybrid metasurface proposed in this invention achieves high-contrast polarization-selective absorption and possesses advantages such as simple structure, ease of integration, and dynamic tunability, thus it can be widely applied in practical applications such as novel optical polarizers and photodetectors.

The present invention discloses a lithium niobate thin film phase modulator heterogeneously integrated with silicon nitride, belonging to the field of integrated optical gyroscopes; comprising a substrate, a silicon dioxide cladding, a lithium niobate thin film-silicon nitride optical waveguide core layer, and a modulation electrode; wherein the optical waveguide core layer is a ridge structure, comprising a lithium niobate thin film layer, a silicon nitride layer, and a silicon nitride carrier strip, satisfying single-mode transmission conditions; the silicon nitride carrier strip constitutes a multimode interference coupler, a bending unit, and a modulation arm; the multimode interference coupler adopts a one-to-two structure with a splitting ratio close to 1:1; the ridge waveguide structure is used for light transmission, and the multimode interference coupler unit is used for light splitting; simultaneously, three modulation electrodes generate an electric field, causing the light transmitted in the two modulation arms to undergo phase changes, thereby outputting two beams of light with a certain phase difference. Polarization is achieved based on the different binding effects of the ridge waveguide on the TE mode and the TM mode, that is, the loss of the TE mode and the TM mode in the waveguide is different, achieving a high polarization extinction ratio.

A LIDAR and a movable device are provided. The LiDAR includes a housing, a transmitter, a receiver, a beam splitter, and a first extinction device. The beam splitter includes a light-transmitting portion and a light-reflecting portion connected to the light-transmitting portion. The first extinction device is located inside the housing, along the transmission path of the echo light, and between the beam splitter and the receiver, and the first extinction device is configured to block the optical signal in the non-primary optical path regions from being transmitted to the receiver.

The invention provides an optical waveguide and a near-to-eye display device. The optical waveguide comprises a light guide part, a relay module arranged on the light guide part and a coupling-out module. Wherein the relay module is used for coupling light rays propagated by total internal reflection in the light guide piece to the coupling-out module; the light guide device further comprises an extinction device arranged on the light guide part, the extinction device at least comprises a first extinction device, and the first extinction device is used for absorbing one-dimensional emergent light transmitted by the relay module. Wherein the ratio of the refractive index of the first extinction device to the refractive index of the light guide part is within a set threshold value, and extinction particles are doped in the first extinction device. According to the technical scheme, the extinction device is arranged on the light guide part to eliminate the one-dimensional emergent light transmitted by the relay module, so that stray light in the light guide part is reduced, and the display effect of the near-to-eye display device is improved.

The present disclosure provides a middle wave infrared integrated polarization detector and a preparation method. The middle wave infrared integrated polarization detector comprises a plurality of polarization gratings arranged in a periodic array, a dielectric film layer and a middle wave infrared detection chip arranged in sequence. The middle wave infrared detection chip has a plurality of pn junction regions arranged in a periodic array. The pn junction regions are arranged one by one corresponding to the polarization gratings. The middle wave infrared detection chip has a plurality of isolation grooves. The isolation grooves are arranged between adjacent two polarization gratings. The isolation grooves are filled with isolation pieces. By arranging the isolation pieces in the middle wave infrared detection chip, the polarization light crosstalk of adjacent two polarization gratings is suppressed, and the extinction ratio of the middle wave infrared integrated polarization detector is improved. The preparation method of the present disclosure uses nanoimprint technology to directly process nanoscale polarization gratings on the dielectric film layer, which can improve the processing efficiency and reduce the processing cost.

The invention discloses an arc light online monitoring device for an energy storage power distribution switch cabinet, and belongs to the technical field of arc fault monitoring. Comprising a monitoring unit and a collecting unit, a quartz window short horn mouth captures 2pi spherical degree arc light at a time, and a closed plastic optical fiber sends a pulse into an integrating sphere within 50 microseconds; a black body extinction cylinder-narrow band filter-integrating sphere multi-stage attenuation is carried out, strong light is weakened firstly, then an ultraviolet characteristic spectrum is extracted, flash of a background lamp and a camera is completely eliminated, arc light position offset still keeps stable output, and high signal-to-noise ratio identification is realized; a real arc is judged according to the ratio of pure arc light to total light, and interference is avoided; after confirmation, a level in direct proportion to energy is output immediately, a background acts according to a three-level strategy of prompting, tripping and quick breaking, no optical cable is exposed in the whole process, the whole process is not influenced by dust condensate water, a closed loop from arcing to protection decision is completed within 2 ms, and real-time, reliable and maintenance-free arc light online monitoring is provided for an energy storage power distribution switch cabinet.

The present invention provides a quantum entanglement light source device that takes advantage of the benefits of using optical fibers and can compensate for the decrease in polarization extinction ratio with a simple configuration. [Solution] A quantum entanglement light source device according to one embodiment of the present invention comprises a wavelength conversion unit capable of generating polarized light with a wavelength longer than the wavelength of the pump light, and a polarization control unit provided midway through optical fibers provided on both end faces of the wavelength conversion unit, capable of controlling the polarization direction of the pump light in the wavelength range.

The invention discloses a bottom mud resuspension dimming method for water source algae control, and relates to the technical field of blue-green algae prevention and control, the method comprises the following steps: establishing an experiment system comprising a plurality of groups of independent water body simulation devices, each group of device being provided with a bivariate combination of bottom mud concentration and resuspension frequency; constructing a parameterized extinction model related to the sediment concentration and the sedimentation time based on the real-time illumination data of the vertical layered optical monitoring network; the turbidity of the water body is monitored in real time, when the turbidity exceeds a critical value, a dynamic compensation coefficient is generated, and a theoretical daily light receiving quantity threshold value is increased according to a direct proportion relation; traversing all double-variable combinations, and screening variable combinations which simultaneously meet the condition that the actual daily light receiving quantity is not greater than the theoretical threshold value subjected to turbidity correction and the product of the total bottom mud adding quantity and the mechanical energy consumption is minimized. According to the scheme, the parameter adaptability under the complex hydrological condition is remarkably improved, the theoretical optimal cost boundary is approached, and the algae control interruption risk is reduced.

The invention discloses a sub-wavelength metal wire grating microarray polarization parameter reconstruction method and device, a medium and equipment. The method comprises the following steps: obtaining detection light intensity of a target in a fixed angle direction and detection light intensity change; obtaining polarization detection light intensity based on the sum value of the detection light intensity in each fixed direction and the detection light intensity change; obtaining a first target polarization detection vector matrix according to the Stokes parameter matrix; replacing the detection light intensity in the first target polarization detection vector matrix with the polarization detection light intensity to obtain a second target polarization detection vector matrix; and inputting the second target polarization detection vector matrix and a polarization transmittance parameter, an extinction ratio parameter and a uniformity parameter of the sub-wavelength metal wire grating microarray into a pre-constructed multi-parameter joint constraint polarization parameter reconstruction network, and outputting polarization energy, polarization degree and polarization angle information after target reconstruction. According to the invention, high-precision reconstruction of polarization energy parameters, polarization degree parameters and polarization angle parameters can be provided.

Intelligent control of solar transmission through windows promises to reduce energy consumption for thermal comfort in buildings. However, the ability of current smart windows to regulate solar gain based on tunable extinction of phase-change materials is not optimum. A thin-film thermochromic device based on tunable light scattering of hydrogel microparticles of prescribed diameters is reported. In the study, poly (N-isopropylacrylamide)-2-Aminoethylmethacrylate hydrochloride (pNIPAm-AEMA) microparticles are synthesized, with low phase transition temperature ˜32° C. Notably, the average size of pNIPAm-AEMA particles can vary from 1388 nm at 25° C. to 546 nm at 35° C., leading to unprecedented infrared transmittance modulation of 75.6%, in agreement with the numerical simulation based on Mie theory. A high luminous transmittance of 87.2% is accomplished. The pNIPAm-AEMA device demonstrates tunable scattering with excellent stability and scalability, which may find application in a broader field of light management beyond energy-saving smart windows.

The utility model relates to the technical field of particle counting sensors, in particular to a light supplementing structure of a particle counting sensor, which comprises a sensor body and a laser transmitter, a photosensitive cavity is arranged in the sensor body, a laser channel is arranged on one side of the photosensitive cavity, and an extinction channel is arranged on the other side of the photosensitive cavity. The laser channel and the extinction channel are coaxially arranged; the delustring device further comprises a plug, and one end of the plug is detachably arranged in the delustring channel. A counter bore is formed in one end, facing the laser channel, of the plug, and the bottom of the counter bore is used for reflecting a laser beam emitted by the laser emitter back to the photosensitive cavity; according to the utility model, the hole bottom of the counter bore is used for reflecting the laser beam emitted by the laser emitter back to the photosensitive cavity, so that the sampling air flow can be subjected to bidirectional irradiation, light supplement is realized, and when the number of particles in the sampling air flow is large, the light scattering effect can be enhanced in a bidirectional irradiation manner, and the measurement precision is improved.