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34 results about "Polarized light imaging" patented technology
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Imaging Device and Video Recording/Reproducing System
ActiveUS20110033177A1Simple structureMiniaturize an imaging deviceTelevision system detailsColor television detailsCamera lensImaging lens
Disclosed herein is an imaging device that includes a photographing lens configured to focus light from a subject, a splitter configured to split the focused light to left and right in an area, in which light diffused from one point of the subject becomes parallel light, so as to respectively form different polarized lights, an imaging lens configured to respectively image the split different polarized lights, a transmission unit configured to receive the imaged different polarized lights on the same plane so as to transmit any one of the polarized lights in each area of the plane, an imaging element configured to convert the transmitted light on the plane into an image according to an electronic signal, and an image generating unit configured to extract and interpolate the converted image in each area so as to generate two different images.
Owner:SONY CORP
Orthogonal polarized light imaging diffractive optical device based on meta-structure surface
ActiveCN111367088AImprove transmittanceImprove reflectivityOptical elementsOptical antennaSub wavelength
The invention provides an orthogonal polarized light imaging diffractive optical device based on a super-structure surface. The orthogonal polarized light imaging diffractive optical device is composed of a substrate and sub-wavelength optical antennas arranged on a surface of the substrate in an array mode, wherein the sub-wavelength optical antenna array is a two-dimensional array, directions parallel to the row and the column of the sub-wavelength optical antenna array are used as an x axis and a y axis respectively, the cross section shape of each optical antenna along the xy plane has C2symmetry, the length and the width of each optical antenna are respectively 1 / 20 to 1 / 2 of the working wavelength, the heights of the optical antennas are equal and are in a sub-wavelength range, anda center distance between two adjacent optical antennas is equal and does not exceed half of the working wavelength; the transmission phase is applied to the orthogonal linearly polarized light by designing the length and width of each optical antenna, and the transmission phase and the geometric phase are simultaneously applied to the orthogonal circularly polarized light by designing the lengthand width and the rotation angle of each optical antenna. The orthogonal polarized light imaging diffractive optical device is advantaged in that simultaneous focusing imaging of different positions of the orthogonal polarized light can be realized by using one unit structure.
Owner:TSINGHUA UNIV
Optical display system, control method and display device
PendingCN111487786AMitigating the Vergence Conflict ProblemImprove experienceOptical elementsDisplay deviceFirst light
The invention provides an optical display system, a control method and a display device, and relates to the technical field of display. Convergence conflicts can be greatly reduced. The optical display system comprises a display screen, a first light splitting unit, an imaging unit, a second light splitting unit, a first light path unit, and a second light path unit, wherein light emitted by the display screen is converted into first type polarized light or second type polarized light after passing through the first light splitting unit; the light emitted by the first light splitting unit forms an amplified image corresponding to a first focal length after passing through the imaging unit; after the first type of polarized light transmitted by the second light splitting unit passes throughthe first light path unit, an amplified image corresponding to a second focal length is formed and converted into a second type of polarized light; and the second type of polarized light reflected bythe second light splitting unit is converted into the first type of polarized light after passing through the second light path unit. The system, the method and the device are suitable for manufacturing of the optical display system.
Owner:BOE TECH GRP CO LTD +1
Detection method based on polarized light imaging technology
InactiveCN104899890AOvercome limitationsImprove detection efficiencyImage enhancementImage analysisImaging processingSingle image
The invention relates to the technical field of image processing, and especially relates to a detection method and a detection device based on a polarized light imaging technology. According to the invention, polarized light imaging and intensity imaging principles are combined to fuse multi-source images, an enhanced fusion image is generated by utilizing complementation information in polarization image information and intensity image information, the details of the fusion image is more outstanding than that of any of polarization images and intensity images, and a new enhanced image deriving from the multi-source images is formed. The contrast of objective discrimination characteristics in the fusion image is far higher than the contrast of the objective discrimination characteristics in the intensity images, so that describing of relative scenes which is unable to obtained by a single image is realized, the limitation of the single image is overcome, the detection efficiency of objects to be detected is improved, and the accuracy of the detection efficiency is enhanced.
Owner:SHANGHAI YIYA IND CO LTD
Polarized light imaging devices and methods
InactiveUS7627363B2Improve spatial resolutionLimited field of viewDiagnostics using lightLuminescence/biological staining preparationRapid imagingPolarizer
The present invention is directed to a novel multi-spectral contrast agent-enhanced polarized light imaging technique that enables rapid imaging of large tissue fields. The imaging device includes a tunable monochromatic light source and a CCD camera. Linear polarizers are placed into both the incident and collected light pathways in order to limit the measurement volume to the superficial tissue layers. To enhance the tumor contrast in the image, aqueous solutions of toluidine blue or methylene blue are topically applied.
Owner:THE GENERAL HOSPITAL CORP
Multi-spectrum portable dermatoscope system
PendingCN106073719AReduce volumeLightweightDiagnostic recording/measuringSensorsCamera lensData acquisition
The invention belongs to the field of domestic health care instruments or medical instruments and in particular discloses a portable multi-spectrum dermatoscope system. The portable multi-spectrum dermatoscope system comprises a dermatoscope body; a liquid crystal display screen, a lens group, a data interface, a magnification factor adjusting button and a photographing button are arranged at the outer part of the dermatoscope body; the liquid crystal display screen and the lens group are integrally designed; an external structure of the lens group comprises a lens and a multi-spectrum light source; the lens group is further internally provided with a data acquisition module and a data processing module; the dermatoscope body is internally provided with a rechargeable battery and a wireless module. The dermatoscope system is convenient to carry and a polarized light imaging principle can be utilized very well; a clear image can be obtained without direct contact with an observed part; meanwhile, different observation results can be obtained when different light sources are used, so that the diagnosis is more accurate; moreover, the portable multi-spectrum dermatoscope system can be connected with mobile equipment, a computer, a display device and the like and can realize remote data sharing through Internet, so that the aim of remote diagnosis or remote consultation is relatively convenient to realize.
Owner:重庆金创谷医疗科技有限公司
Single photon compression polarization imaging device and method
InactiveCN110044483ALow costReduce the number of measurementsRadiation pyrometryPolarisation spectroscopyDigital micro mirror deviceLuminous flux
The invention relates to the field of weak light imaging and the field of polarized light imaging, in particular to a single photon compression polarization imaging device and method. The single photon compression polarization imaging device includes an imaging target, object lens, a rotating polarized film, a rotating translation stage, digital micro-mirror devices, focusing lens, a single photondetector, a controlling andsynchronous counting model base on FPGA and an upper computer. According to the single photon compression polarization imaging device, the controlling and synchronous counting model base on FPGA controls the digital micro-mirror devices turning and the rotating polarized film rotating to obtain photon counting values of four polarized angles based on compressed sensingso that image reconstruction and integration are conducted. Therefore, measuring costs and measuring times are reduced, and the luminous flux and the sensitivity of the single photon compression polarization imaging device are improved. At the same time, the single photon compression polarization imaging device has the advantages of high-integration level and being simple and convenient to operate.
Owner:NANCHANG UNIV
Rotating wheel type underwater polarization camera
PendingCN109905585AAvoid Low Contrast IssuesRealize computingTelevision system detailsColor television detailsControl cellMechanical engineering
The invention discloses a rotating wheel type underwater polarization camera which comprises a sealed cabin, and an illumination module, an imaging unit, a polarization module, a control unit and a power supply module which are mounted in the sealed cabin through an internal bracket, The illumination module, the imaging unit and the polarization module are all connected with the control unit; thepower supply module provides working voltage for the whole rotating wheel type underwater polarization camera; Wherein the illumination module is used for illuminating a target object, and the polarization module is used for carrying out polarization processing on incident light, so that the polarization directions of the light irradiated to the imaging unit are consistent; And the imaging unit performs polarized light imaging on the target object. The device is reasonable in structure and simple to operate, and can quickly shoot the polarization image of the underwater object.
Owner:ZHEJIANG UNIV
Head-up display system and vehicle
The embodiment of the invention discloses a head-up display system and a vehicle. The head-up display system comprises a control module, an image source module and an imaging module, the image source module comprises a display assembly and a dimming assembly, and the dimming assembly comprises a polarization state adjusting unit, a metal wire grating and a reflector which are sequentially arranged along the side away from the light emitting surface of the display assembly; the display assembly is electrically connected with the control module, and the display assembly is used for emitting imaging light under the control of the control module; and the polarization state adjusting unit is electrically connected with the control module, and the polarization state adjusting unit is used for modulating the imaging light into polarized light in the first polarization direction within the first display time period t1. In the second display time period t2, modulating the imaging light into polarized light in the second polarization direction. The imaging module is used for transmitting the polarized light in the first polarization direction or the polarized light in the second polarization direction to a windshield, and the windshield reflects the polarized light into human eyes for imaging. According to the embodiment of the invention, the size and cost of the head-up display system are reduced.
Owner:SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
Intelligent object recognition system and control method based on depth learning
PendingCN109190633AQuality improvementCharacter and pattern recognitionNeural learning methodsLoudspeakerEmbedded hardware
The invention discloses an intelligent object recognition system and control method based on depth learning. The system comprises: a DSP controller, an FPGA control, a RAM memory, a DDR3 memory, an image acquisition module, an infrared polarized light imaging module, a data communication interface module, a WIFI Controller, an ultrasonic transmitter receiver, a loudspeaker and a power source. Theinvention adopts depth learning algorithm to realize object detection and target recognition, and realizes the algorithm on embedded hardware quickly, can better solve some technical bottlenecks in object detection and recognition, and provides better technical support for automatic driving, pedestrian detection, personal safety protection and intelligent monitoring.
Owner:XIAN UNVERSITY OF ARTS & SCI
Imaging device and video recording/reproducing system
ActiveUS8078048B2Simple structureMiniaturize an imaging deviceTelevision system detailsColor television detailsImaging lensVideo recording
An imaging device includes a photographing lens configured to focus light from a subject, a splitter configured to split the focused light to left and right in an area, in which light diffused from one point of the subject becomes parallel light, so as to respectively form different polarized lights, an imaging lens configured to respectively image the split different polarized lights, a transmission unit configured to receive the imaged different polarized lights on the same plane so as to transmit any one of the polarized lights in each area of the plane, an imaging element configured to convert the transmitted light on the plane into an image according to an electronic signal, and an image generating unit configured to extract and interpolate the converted image in each area so as to generate two different images.
Owner:SONY CORP
Stereographic projection optical system
InactiveCN102169237AFew partsSimple structureProjectorsOptical elementsEffect lightLight emitting device
A stereographic projection optical system comprises a light-emitting device, which emits light; polarized light-splitting device, which receives the light emitted from the lighting-emitting device and converts the light to two beams of polarized light for emitting, with polarization directions of the two beams being perpendicular to each other; and a projection device which receives the polarized light emitted from the polarized light-splitting device and realizes imaging of the polarized light. The stereographic project optical system is simple in structure and convenient for installation.
Owner:SHANGHAI LEXVU OPTO MICROELECTRONICS TECH
Near-infrared blood glucose detection device and equipment based on polarized light imaging
ActiveCN113456069AImprove signal-to-noise ratioReduced scattering effectMedical automated diagnosisDiagnostic recording/measuringHuman skinGlucose detection
The invention relates to a near-infrared blood glucose detection device and equipment based on polarized light imaging, wherein the device comprises a processor, and when the processor runs in a computer program stored in a computer readable storage medium, the following steps are realized: S1, establishing a double-layer skin optical model of a human body according to the skin condition of the human body; S2, setting relevant optical parameters of photons propagating in the skin, and establishing a Monte Carlo simulation process; S3, carrying out Monte Carlo simulation calculation to obtain a Mueller matrix of the back of the human body skin; S4, calculating through each array element of the Mueller matrix to obtain each polarization parameter; and S5, comparing the change rate of each polarization parameter along with the scattering coefficient and the absorption coefficient to obtain a specific polarization parameter which is better than the specific polarization parameter of a method which is used for extracting the absorption information of the blood glucose only by using the light intensity information. According to the device, the shallow surface layer scattering influence is reduced based on polarization parameters, so that other microstructure information such as deep absorption is obtained, the signal-to-noise ratio of blood glucose detection can be increased, and the deep absorption measurement precision is improved.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
High-precision real-time three-dimensional measurement system and method for measuring micro defects on surface of aviation component
PendingCN113029960AEasy to integratePortable and convenientOptically investigating flaws/contaminationAviationGrating
The invention provides a high-precision real-time three-dimensional measurement system and method for measuring micro defects on the surface of an aviation component. The system comprises a light source system, a polarized light modulation subsystem, a to-be-measured target, a detection and acquisition system and a computer processing system which are sequentially arranged along a light path; the polarized light modulation subsystem comprises a light beam collimation assembly and a polarization state modulation assembly which are sequentially arranged along the light path. Modulation of two beams of circularly polarized light with opposite rotation directions is realized by adopting the polarization grating, and the system is simple, compact and convenient to integrate and carry; according to the invention, a focal plane type polarization detector is adopted, four polarization images can be obtained at the same time, images under four phase shifts can be obtained through single exposure, and the three-dimensional shape of the surface defect of a to-be-detected part is solved in real time; by means of the polarized light imaging, light beam stability is good, accuracy is high, strong reflection flare light on the surface of a component can be effectively eliminated, and the imaging effect is better.
Owner:AIR FORCE UNIV PLA
Polarized light imaging system energy calculation method in complex weather
ActiveCN113701886AReal polarized light energy transfer resultsPolarisation spectroscopyComplex mathematical operationsLight energyMATLAB
The invention discloses an energy calculation method for a polarized light imaging system in complex weather, which belongs to the field of optical detection theory research and comprises the following steps: determining polarized light imaging conditions and environmental conditions and target and detector parameters in complex weather; calculating the irradiance of the solar radiation energy on the target in the response wave band of the detector; determining a target polarization reflectivity by using a 6S atmospheric radiation transmission model; acquiring the brightness of target indirect radiation; using Modtrans4.0 software to determine the atmospheric average transmittance of the detector response wave band; determining the transmittance of the optical system by using zemax software; acquiring detector image plane center illumination, light energy at an entrance pupil of an optical system, the number of electrons generated by a target on the detector, total system noise and a signal-to-noise ratio; utilizing matlab / VC + + programming software, compiling software according to the process, and carrying out analysis and optimization iteration; finally, forming a polarized light imaging system meeting the energy requirement and the signal-to-noise ratio requirement.
Owner:CHANGCHUN UNIV OF SCI & TECH
Dust concentration measuring device based on polarization light
The invention discloses a dust concentration measuring device based on polarization light. The dust concentration measuring device includes a channel with dust flowing, a hollow transparency sphere, alaser device, a first lens, a first polarizer, a quarter-wave plate, an optical fiber fixing frame, a camera, a second quarter-wave plate, a second polarizer, and a second lens; wherein the hollow transparency sphere is formed by the expanding part in the channel with dust flowing, rays of the laser device directly glare the transparency sphere, and the first lens, the first polarizer and the quarter-wave plate are arranged between the laser device and the hollow transparency sphere; an optical fiber opening of optical fiber is densely formed in the spherical surface of the hollow transparency sphere, and the optical fiber fixing frame is at the other end of the optical fiber and ties the optical fiber neatly; and the camera is arranged in front of the optical fiber fixing frame, and thesecond quarter-wave plate, the second polarizer and the second lens are arranged between the optical fiber fixing frame and the a camera lens. According to the dust concentration measuring device based on the polarization light, a light scattering theory is used, a polarization light imaging method can provide more abundant sample structure information than a non-polarization optics method and isvery sensitive to sub-wavelength micro structure changes, and thus the measuring method of the structure is accurate.
Owner:HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Polarized light endoscope device, camera, and camera optical system
PendingCN114176484ASuppress scattered lightImprove securitySurgeryEndoscopesOptical propertyWavelength
The invention mainly discloses a polarized light endoscope device camera optical system. The polarized light endoscope device camera optical system comprises an optical adapter and an optical splitter which are sequentially arranged from the object side to the image side in the axial direction. The optical splitter has an optical characteristic of selecting the wavelength of the light wave into two wave bands of 380 nm-lambda and lambda-700 nm, and reflects the light wave with the wavelength of 380 nm-lambda and transmits the light wave with the wavelength of lambda-700 nm at the same time, or transmits the light wave with the wavelength of 380 nm-lambda and reflects the light wave with the wavelength of lambda-700 nm at the same time; and lambda is an arbitrary value in the range of 600 nm to 670 nm. After the light waves are split, the light waves with the wavelength of 380 nm to lambda are imaged on the white light image sensor, the light waves with the wavelength of lambda to 700 nm are imaged on the polarized light image sensor, the polarized light endoscope device can simultaneously obtain common white light images and polarized light images in an operation, the polarized light imaging can provide clearer images, the operation field in the operation is kept clear continuously, and the operation efficiency is improved. And the safety and effectiveness of the operation are improved.
Owner:CHONGQING XISHAN SCI & TECH
Method for distinguishing red oxide skin and red corrosion product of hot rolled steel
ActiveCN110174402AEasy to findGood Field of ViewPreparing sample for investigationMaterial analysis by optical meansSingle samplePolarizer
The invention discloses a method for distinguishing red oxide skin and a red corrosion product of hot rolled steel. The method comprises the steps of preparing samples: cutting the hot rolled steel with red substances on the surface into single samples; searching for a target area by adopting parallel light: carrying out observation by using a microscope with a polarizer and a polarization analyzer, drawing out the polarizer during the observation, stopping use of the polarizer and the polarization analyzer, switching the microscope to be in a bright field imaging mode, observing the surfacesor sections of the samples, adjusting an imaging mode of the microscope to be a color mode, and adjusting a magnification factor to find the target area; observing the target area by adopting polarized light: pushing the polarizer to the bottom of the microscope, starting use of the polarizer and the polarization analyzer, switching the microscope to be in a polarized light imaging mode, adjustingthe polarizer and the polarization analyzer of the microscope to be in an orthogonal state, and shooting the target area by adopting orthogonal polarized light to obtain a polarized light picture; and classifying results. According to the method, the types of the red substances on the surface can be rapidly distinguished, and the test time is short.
Owner:NANJING IRON & STEEL CO LTD
Endoscope device camera polarized light optical system, camera and endoscope device
ActiveCN114176485AImprove securityRealize functions such as penetrating bone slagSurgeryEndoscopesEngineeringWavelength
The invention mainly discloses a polarized light optical system for a camera of an endoscope device. The polarized light optical system comprises an optical adapter and an optical splitter which are sequentially arranged from the object side to the image side in the axial direction. The optical splitter has the optical characteristics of dividing the wavelength of light into three wave bands of R, G and B and a special light wave band of lambda-700nm for selection, and lambda is an arbitrary value in a range of 600nm-670nm; light waves of one wave band are transmitted, and light waves of the other three wave bands are reflected at the same time; the common white light image and the polarized light image in the operation can be obtained at the same time, and the common white light image and the polarized light image are complementary to each other. Under the condition that the environment is blurred in the operation, the polarized light imaging can provide clearer images, and the functions of blood penetration, bone residue penetration and the like are achieved, so that the operation view in the operation can be kept clear continuously, and the safety and effectiveness of the operation are greatly improved.
Owner:CHONGQING XISHAN SCI & TECH
Near-to-eye display device
PendingCN114660807AAchieve three-dimensional display effectAvoid Vergence ConflictsNon-linear opticsOptical elementsImaging lensOptical polarization
The invention discloses a near-to-eye display device, and the device comprises a display screen which is used for displaying a first image and a second image in a time-sharing manner; the polarization converter is used for converting emergent light of the display screen into first circularly polarized light; the imaging lens group is used for imaging an image displayed by the display screen; the semi-transparent and semi-reflective layer is located between the polarization converter and the first lens; the reflection polarization layer is located on the side, deviating from the polarization converter, of the semi-transparent and semi-reflective layer and used for reflecting the first linearly polarized light and transmitting the second linearly polarized light, and the polarization directions of the first linearly polarized light and the second linearly polarized light are perpendicular to each other; and the liquid crystal lens is positioned between the semi-transparent and semi-reflective layer and the reflective polarization layer. When the liquid crystal lens is switched between the first phase retardation and the second phase retardation, the light path of the light in the near-to-eye display device is changed, so that the near-to-eye display device can image at two focal lengths, the human eyes can watch an image with a certain depth of field, a three-dimensional display effect is achieved, and convergence conflicts are avoided.
Owner:BOE TECH GRP CO LTD
Ring laser electrode indium seal quality detecting method and system
PendingCN109580187AEliminate reflected stray lightIncrease contrastTesting optical propertiesIndiumRing laser
The invention discloses a ring laser electrode indium seal quality detecting method and system. The system comprises a linearly polarized light source and a polarized light imaging mechanism, linearlypolarized light generated by the linearly polarized light source is obliquely incident into a glass cavity to be irradiated to an interface of the glass cavity and an indium ring, mixed reflected light is formed, the mixed reflected light is imaged by a polarized light imaging mechanism, a polarized light imaging system includes a quarter wave plate, an polarization analyzer and an industrial CCDcamera, and the quarter wave plate and the polarization analyzer can effectively filter the reflected light generated by the glass cavity and only allow the reflected light in an indium ring region to be imaged. The ring laser electrode indium seal quality detecting system eliminates the stray reflected light on the surface of the glass cavity, increases the contrast of imaging of the indium ring, makes the sealing connecting defects be easier to observe, and improves the indium ring detection quality.
Owner:HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
An energy calculation method for polarized light imaging system in complex weather
ActiveCN113701886BReal polarized light energy transfer resultsPolarisation spectroscopyComplex mathematical operationsLight energyMATLAB
The invention discloses a method for calculating the energy of a polarized light imaging system under complex weather, belonging to the field of optical detection theory research, including determining polarized light imaging conditions and environmental conditions, target and detector parameters under complex weather; calculating solar radiation energy in the detector The irradiance to the target in the response band; use the 6S atmospheric radiation transfer model to determine the polarized reflectance of the target; obtain the brightness of the target’s indirect radiation; use Modtran4.0 software to determine the average transmittance of the detector in the response band; use zemax software to determine The transmittance of the optical system; obtain the central illuminance of the detector image plane, the light energy at the entrance pupil of the optical system, the number of electrons generated by the target on the detector, the total noise of the system and the signal-to-noise ratio; use Matlab / VC++ programming software, according to the above The software is compiled during the process, and the analysis and optimization iterations are carried out; finally, a polarized light imaging system that meets the energy requirements and signal-to-noise ratio requirements is formed.
Owner:CHANGCHUN UNIV OF SCI & TECH
Position detecting device and projector
Provided is a position detecting device including: a light emission unit configured to emit light in a predetermined wavelength band in a manner substantially parallel to a plane surface; a polarization filter configured to transmit p polarized light of light reflected on the plane surface and to block s polarized light thereof; and an imaging unit configured to perform imaging of the plane surface obliquely from above with the light in the predetermined wavelength band through the polarization filter.
Owner:CASIO COMPUTER CO LTD
Infrared sub-pixel polarized light imaging device and imaging method
PendingCN113596360AReduce volumeSmall sizeTelevision system detailsColor television detailsImage resolutionOptical polarization
The invention discloses an infrared sub-pixel polarized light imaging device and an imaging method. On the basis of using a staggered rhombus array mode, pixel pitch can be greatly reduced by reconstructing pixels containing polarization information of different polarization angles. Due to the fact that the size of the pixel pitch determines resolving power, on the premise that the resolution ratio is not changed, the optical area is greatly reduced, the size of the sensor is reduced, the size and the cost of the lens are reduced, and the cost of the whole machine is greatly reduced.
Owner:XINFOO SENSOR TECH CO LTD
Underwater polarized light imaging method and imaging system
PendingCN113706403AImprove recovery accuracyEffective filteringImage enhancementImage analysisData centerUnderwater
The invention discloses an underwater polarized light imaging method and system, and the method comprises the steps: enabling a light source to emit visible light, and enabling the visible light to irradiate an underwater target object after penetrating through a polarizer; filtering underwater interference light information by using an analyzer located at the receiving device; acquiring information of a target object by a receiving device; and performing image restoration on the acquired information through a compressed sensing restoration algorithm to obtain an image of the target object. In this way, the compressed sensing technology and the underwater polarized light imaging technology are combined, interference light information can be effectively filtered out through the filtering mode that the polarizer and the analyzer are combined, meanwhile, the compressed sensing recovery precision is improved, more effective information of a target object is obtained, and therefore in the underwater environment, the efficiency and quality of target image reconstruction are improved, and the competitiveness of the data center is improved.
Owner:INSPUR BEIJING ELECTRONICS INFORMATION IND
A Diffractive Optical Device for Orthogonal Polarized Light Imaging Based on Metasurface
ActiveCN111367088BImprove transmittanceImprove reflectivityOptical elementsOptical antennaSub wavelength
Owner:TSINGHUA UNIV
Optical coherence imaging system capable of eliminating inherent noise and imaging method
The invention provides an optical coherence imaging system capable of eliminating inherent noise. The optical coherence imaging system comprises a light source (1) and further comprises an optical fiber coupler (2), an A scanning trigger unit (3), an interferometer (4), a first collimating lens (5), a reflector (6), a second collimating lens (7), a two-dimensional galvanometer scanning unit (8), a focusing lens (9), an optical fiber polarizing unit (10), a detection unit (11), a data analysis and display unit (12) and a control unit (13) which are sequentially arranged in the propagation direction of light beams emitted by the light source (1). According to the optical coherence imaging system capable of eliminating the intrinsic noise, the A scanning trigger unit is arranged to replace an A scanning trigger signal in a signal source to eliminate the intrinsic noise, and the optical fiber polarizing unit is arranged to construct a polarized light imaging structure, so crosstalk is not likely to happen in a detection process, interference of stray light in the natural environment is almost avoided, signal intensity and a signal-to-noise ratio are greatly improved, and imaging accuracy and operation safety are improved.
Owner:JIHUA LAB
Near-infrared circularly polarized light imaging diffractive optical device
A near-infrared circularly polarized light imaging diffractive optical device provided by the invention comprises a substrate layer having a first surface and a second surface opposite to each other; multiple first sub-wavelength gratings which are arranged on the first surface of the substrate layer in an array mode; and multiple second sub-wavelength gratings which are arranged on the second surface of the substrate layer in an array mode. The size of each first sub-wavelength grating is determined by a first method, and the size of each second sub-wavelength grating is determined by a second method, so that the near-infrared circularly polarized light imaging diffractive optical device can apply a transmission phase to the circularly polarized light. According to the invention, the focusing imaging of the specific circularly polarized light is realized by using the double-layer metasurface, and the stray light is less.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
Optical coherence imaging system capable of reducing optical path dispersion and imaging method
InactiveCN112596256ALow dispersionReduced dispersion performance requirementsOptical elementsFiber chromatic dispersionControl cell
The invention provides an optical coherence imaging system capable of reducing optical path dispersion and an imaging method, and the system comprises a light source (1), a detection unit (2), an interferometer (3), an image beam transmission unit (4), a reference beam transmission unit (5), a reference beam transmission unit (5), a data collection and analysis unit (6), a control unit (7), and animage display unit (8). According to the optical coherence imaging system capable of reducing optical path dispersion, a polarized light imaging technology is adopted, the optical coherent imaging system capable of coordinating work and reducing optical path dispersion is constructed by using an optical fiber polarizer and a polarization coupler, interference of stray light in the natural environment is not likely to happen, dispersion of the whole optical path is reduced, and the requirement for the optical fiber dispersion performance is greatly lowered; the implementation difficulty and cost of the technical scheme are reduced, the imaging signal intensity and the signal-to-noise ratio are improved, and the detection accuracy and the operation implementation safety are improved.
Owner:JIHUA LAB
Water drop detection system and method for optical mirror surface and water drop erasing system
ActiveCN113533215AImprove robustnessImprove recognition accuracyPolarisation-affecting propertiesOptic lensImage pair
The invention discloses a water drop detection system for an optical mirror surface, which is used for detecting water drops attached to the surface of the optical mirror surface and comprises a polarized light acquisition device, an image acquisition device and a control processor. The polarized light acquisition device is used for polarizing and refracting reflected light on the surface of the optical lens to acquire polarized light. The image acquisition device is used for acquiring polarized light images. The control processor is used for detecting water drops on the surface of the optical lens according to the polarized light image. The water drop detection is carried out through the polarized light imaging of the reflected light on the surface of the optical lens, so that the influence of the reflection background can be filtered to a certain extent, and the recognition accuracy of the adhered water drop and the robustness to the environment are improved.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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