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4868 results about "Polarizer" patented technology
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A polarizer or polariser is an optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations. It can filter a beam of light of undefined or mixed polarization into a beam of well-defined polarization, that is polarized light. The common types of polarizers are linear polarizers and circular polarizers. Polarizers are used in many optical techniques and instruments, and polarizing filters find applications in photography and LCD technology. Polarizers can also be made for other types of electromagnetic waves besides light, such as radio waves, microwaves, and X-rays.
Pump machine metal shell size detection method based on image analysis
The invention belongs to the technical field of industrial measurement, and discloses a pump machine metal shell size detection method based on image analysis, which comprises the following steps: synchronously acquiring image data of a pump machine metal shell in a visible light wave band and a near-infrared wave band; the contrast ratio of image data is optimized through a dynamic exposure control technology, and a high-dynamic-range multispectral image is obtained; three-dimensional geometric information of the pump machine metal shell is obtained, registration fusion is carried out on the three-dimensional geometric information and the high-dynamic-range multispectral image, a dense three-dimensional point cloud model with multispectral textures is constructed, and a multi-frequency heterodyne algorithm is adopted to process a high-reflection area in the dense three-dimensional point cloud model; the method comprises the following steps: collecting a multi-angle reflection image of a pump machine metal shell by rotating a linear polarizer, calculating a Stokes vector to extract a diffuse reflection component, carrying out diffuse reflection component constraint and brightness suppression on a high-reflection area based on a CIE-Lab color space, and outputting a dense three-dimensional point cloud model after texture enhancement; and the size detection precision of the pump machine metal shell is improved.
Owner:JINING ANTAI MINING EQUIP MFG CO LTD
Egg surface microcrack detection system and method based on image analysis
The invention discloses an egg surface microcrack detection system and method based on image analysis, and relates to the field of surface defect nondestructive detection.The method comprises the steps that a process identification interface module obtains a processing process identifier of an egg in real time; the multi-angle annular light source module is provided with a multi-band annular light source array comprising visible light and near-infrared LED lamp beads which are independently controlled, a polaroid group and a beam splitter prism are integrated, and visible light polarization images and near-infrared polarization images on the surfaces of the eggs are synchronously collected; the thermal excitation enhancement unit obtains a thermal infrared image; the process filtering module extracts the axial elongation of the mechanical stress microcrack after graded transportation, and calculates the mesh fractal dimension of the thermal stress microcrack after UV disinfection; the multi-modal feature fusion module generates a dual-channel crack probability graph; and the dynamic feedback control module outputs a micro-crack risk grade and adjusts the rotating speed of the objective table and the light source intensity. The method has the advantages that accurate judgment of mechanical and thermal stress cracks is realized, and curved surface reflection interference is broken through.
Owner:HUIZHOU UNIV
Magnetic material defect detection system based on image recognition
The invention discloses a magnetic material defect detection system based on image recognition, which adopts a first acquisition module, a first determination module, a second determination module, a second acquisition module and a third acquisition module, and is characterized in that the first acquisition module is used for performing multi-angle illumination control on the surface of a magnetic material by adopting a polarized light imaging device; mirror reflection generated by the strong light reflection characteristic is inhibited by adjusting the angle of a polaroid and the incident angle of a light source, original image data with uniform illumination distribution are obtained, and if it is detected that an overexposure area exists in an image, exposure parameters and the polarization angle are automatically adjusted to obtain a high-quality image suitable for follow-up processing; and the first determination module is used for performing multi-scale wavelet transform decomposition according to the acquired high-quality image, identifying a surface defect area by analyzing texture features and edge information in different frequency components, and judging that the surface defect area is a potential defect area if a wavelet coefficient in the high-frequency component exceeds a preset threshold value. The detection performance is obviously improved.
Owner:HUNAN JINCI NEW MATERIAL TECH CO LTD
Polaroid defect detection method and system based on deep learning
The invention provides a polaroid defect detection method and system based on deep learning, and the method comprises the steps: obtaining an initial image data set corresponding to a to-be-detected polaroid; extracting defect candidate region features in the polaroid surface image and texture distribution features of the polaroid surface from the initial image data set through image preprocessing and feature extraction operation; inputting the defect candidate region features and the texture distribution features into a pre-trained defect identification deep learning model to carry out joint defect identification operation, and generating a defect preliminary identification result of the polarizer surface image; and determining the defect type of the defect existing in the polaroid to be detected and the spatial distribution characteristic information of the defect on the surface of the polaroid based on the preliminary defect identification result. According to the invention, effective connection between the defect detection result and the production quality control process can be realized, and the practicability of polaroid defect detection and the guiding value for the production process are improved.
Owner:GUIZHOU IND VOCATIONAL & TECH COLLEGE +1
Online detection method and system for laser-induced damage of optical lens
The invention relates to the technical field of optical lens defect detection, and particularly discloses an optical lens laser-induced damage on-line detection method and system, a linear polarizer and a narrow-band filter are connected in series in a detection laser light path, non-target polarized light is filtered through polarization direction matching, meanwhile, interference of the environment and scattered light is inhibited through the narrow-band filter, and the laser-induced damage on-line detection system is obtained. According to the method, external source noise such as ambient light and non-target polarized light is reduced through polarization matching and narrow-band filtering, randomness of speckle noise is offset through multi-angle collection and signal fusion in a visual detection mode, exposure is dynamically adjusted, an image is fused to improve the signal-to-noise ratio, noise and real signals are decoupled through self-supervised learning, and the real-time performance of the system is improved. Dust interference is removed in combination with morphological operation; a deep learning reasoning model enhances the damage identification capability in a noise environment, defocusing blur caused by mechanical vibration is eliminated through phase conjugate correction, and the influence of photoelectric conversion noise, dust interference and the like on the detection efficiency and accuracy is remarkably reduced through multi-link linkage.
Owner:NANJING BENZE OPTOELECTRONICS TECH CO LTD
Fine metal powder defect detection method and system based on image recognition
The invention relates to the technical field of image data processing, and discloses a fine metal powder defect detection method and system based on image recognition, and the method comprises the steps: illuminating a metal powder region through a non-polarized light source, and collecting two images in an orthogonal polarization state through imaging equipment with a linear polarizer, according to the method, the defect morphological fingerprints are constructed through the polarization information entropy, the three-dimensional structure information is converted into light field order degree change for detection, the dimension limitation of traditional two-dimensional imaging is broken through, and the detection accuracy is improved. Hidden defects such as internal pores and aggregates can be accurately identified, and meanwhile, stable detection and material defect cross discrimination under a dynamic working condition are realized in combination with motion compensation and multiband entropy ratio verification.
Owner:XIAN TUOJIE LANGTU TECHNOLOGY CO LTD
Antistatic PET (Polyethylene Terephthalate) base film for preparing polaroid release film and preparation method of antistatic PET base film
The invention relates to an antistatic PET (Polyethylene Terephthalate) base film for preparing a polaroid release film and a preparation method thereof, the release film base film is prepared by taking an optical-grade PET slice as a main body, adding modified PET with a specific structure and a modified SiO2 filler, and carrying out co-extrusion casting, a unique three-section stretching process and coating with a coating liquid. According to the invention, material modification and process improvement are carried out, specifically, an optical-grade PET slice is taken as a main body material, modified PET and a modified SiO2 filler with a specific structure are added, a film is prepared through co-extrusion casting and a unique three-section stretching process, and then the surface of the film is coated with a layer of antistatic coating liquid, so that the antistatic film is obtained. The finally prepared base film has low alignment angle, low transverse hot shrinkage rate and high surface adhesion, keeps the characteristics of high light transmittance and low haze of an optical-grade polyester film, endows the film with certain antistatic property, and is particularly suitable for being used as a release film of a high-end polaroid.
Owner:扬州博恒新能源材料科技有限公司
Naked eye 3D display optimization method based on real-time eyeball tracking
ActiveCN120751110AInput/output for user-computer interactionBiological modelsPupil diameterOphthalmology
The invention discloses a naked-eye 3D display optimization method based on real-time eyeball tracking, and particularly relates to the technical field of naked-eye 3D display, and the method comprises the steps: capturing eyeball movement data in real time through a visual angle tracking sensor, and collecting illumination information in combination with an ambient light sensor; depth perception parameters are calculated based on pupil diameter variation and frequency, and a time sequence prediction type dynamic compensation coefficient is generated in combination with eyeball movement acceleration; acquiring an initial fixation point coordinate by using an improved spherical projection mapping model, and performing compensation coefficient correction to obtain a real-time coordinate; and finally, according to the real-time coordinates, dynamically adjusting the refractive index distribution of the nanostructure layer, the rotation angle of the polarizer, the focal length of the optical lens and other optical modulation parameters. The real-time distance is calculated through the binocular parallax algorithm, the depth mapping value is generated by combining the focal length of the camera and the baseline distance, the method can adapt to the illumination change and the user view angle, and the 3D display effect is optimized.
Owner:SHENZHEN EASYQUICK TECH CO LTD
Optical film, polarizer and display device
The embodiment of the invention discloses an optical film, a polaroid and a display device. The optical film comprises a first base layer; the second base layer is positioned on at least one side of the first base layer; the first base layer has a first solid phase; the second base layer contains at least two second solid phases; in the at least two second solid phases, two adjacent second solid phases are connected to form a plurality of interfaces, the plurality of interfaces are distributed in the second base layer, and the two second solid phases forming the interfaces are made of different materials. The multiple interfaces are distributed on the second base layer, so that directional reflection of light on the second base layer is reduced, and the anti-dazzling effect is achieved. Besides, the optical film can also provide good light transmittance and higher mechanical strength, so that the integration of an anti-dazzle function is realized on the protective base material of the polaroid, and the thickness and the manufacturing cost of the polaroid are effectively controlled.
Owner:TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
Reflective hollow singlet folded optical lens structure
According to examples, an optical lens assembly for head-mount display (HMD) devices may include an optical lens configuration with a first optical element and a second optical element. The first optical element and the second optical element may be affixed together along a peripheral edge to form a gap between the two optical elements and may compensate chromatic dispersion characteristics. The optical lens configuration may also include a reflective polarizer layer, a quarter wave layer, and a semi-transparent mirror provided on selected surfaces of the optical elements. In some examples, the gap may be filled with air or an inert gas.
Owner:META PLATFORMS TECHNOLOGIES LLC
Visual system
The invention provides a visual system, which comprises an element group and a lens cone group, when the diopter of the visual system is from + 2D to-5D, the moving distance delta L of the second element group along the optical axis, the combined focal length fz1 of the reflective polarizing element, the first quarter-wave plate and the first lens, and the combined focal length fz2 of the second lens, the second quarter-wave plate and the polarizing film meet the condition that delta L * (fz1 / fz2) is greater than or equal to 0.90 mm and less than or equal to 1.82 mm; and the maximum thickness Lb from the first side surface of the second lens barrel to the second side surface of the second lens barrel along the direction of the optical axis, the outer diameter Dbs of the first side surface of the second lens barrel and the inner diameter dbs of the first side surface of the second lens barrel meet the condition that Lb / (Dbs-dbs) is more than or equal to 0.56 and less than or equal to 2.36. The problem that smooth zooming and image quality improvement of a visual system in the prior art are difficult to consider at the same time is solved.
Owner:ZHEJIANG SUNNY OPTICAL CO LTD
Intelligent water quality monitoring and evaluating system based on image recognition
The invention discloses an intelligent water quality monitoring and evaluating system based on image recognition, which relates to the technical field of environment monitoring, and comprises a fusion module for controlling a polarizer array to rotate based on an environment parameter set, capturing water surface optical images in different polarization directions, and performing image reconstruction through a polarization characteristic tensor decomposition method, generating a high-definition water surface image after reflection suppression; the three-dimensional diagram generation module is used for acquiring a morphology stripe image of the water surface through a DLP projection method, and generating a three-dimensional depth diagram in combination with the high-definition water surface image; the pollution identification module is used for correcting the three-dimensional depth map based on the real-time water temperature data, identifying spatial distribution of pollutants through a dynamic structure element opening and closing algorithm and generating a three-dimensional pollution distribution map; according to the method, mirror reflection noise is suppressed through multi-angle polarization image fusion, and the distinguishability of pollutant characteristics is remarkably enhanced while the image resolution is kept.
Owner:CHANGSHA XIAOSHUI ENVIRONMENTAL PROTECTION TECH CO LTD
Optical laminate and image display device using said optical laminate
PCT designated stage expiredWO2025023317A1Layered product treatmentSynthetic resin layered productsPolarizerElliptical polarization
Provided is an optical laminate that includes solidified liquid-crystal oriented layers and is capable of suppressing specific display unevenness when applied to an image display device. An optical laminate according to an embodiment of the present invention comprises: a polarizing plate including a polarizer; and a retardation layer that is laminated on the polarizing plate with a first adhesive layer therebetween. The retardation layer includes, in order from the polarizing plate side, a first solidified liquid-crystal oriented layer and a second solidified liquid-crystal oriented layer laminated on the first solidified liquid-crystal oriented layer with a second adhesive layer therebetween. The retardation layer has a circular polarization function or an elliptical polarization function over the entirety thereof and has a relationship Re(450) < Re(550) < Re(650). The thickness of at least one of the first adhesive layer and the second adhesive layer is 300 nm or less.
Owner:NITTO DENKO CORP
In-situ exploration-while-drilling device and method for lunar resources
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.
Owner:DEEP SPACE EXPLORATION LABORATORY
A fast measurement device for distributed polarization crosstalk based on optical frequency domain frequency shift interferometry
ActiveCN113804301BAvoid Signal Aliasingimprove signal-to-noise ratioLight polarisation measurementContinuous lightCrosstalk measurement
The present invention belongs to the field of optical fiber measurement technology, and specifically relates to an optical fiber distributed polarization crosstalk fast measurement device based on optical frequency domain interference. The device comprises a tunable laser source module (1), a device to be measured module (2), an auxiliary interferometer module (3) and a signal acquisition and analysis module (4), and is characterized in that: a high-coherence tunable laser is used to perform fast wavelength scanning on an optical signal, and a linear frequency modulated continuous light (501) is output, which passes through a polarizer (202), a device to be measured (206) and an analyzer (210) in sequence, and a beat frequency signal generated by the interference of a coupling light (704) and a transmission light (701) is obtained in the optical frequency domain, and then an optical path difference and a normalized interference signal amplitude are calculated, thereby respectively determining the polarization crosstalk position and intensity. The present invention, in combination with a tunable laser, gets rid of the dependence on an optical path scanning delay device in polarization crosstalk measurement, greatly improves the speed and dynamic range of polarization crosstalk measurement, and has a compact structure, is stable and reliable, and is easy to implement.
Owner:GUANGDONG UNIV OF TECH
Transformer oil leakage detection method and device based on polarization-ultraviolet fusion imaging
PendingCN121253089ADetection of fluid at leakage pointColor/spectral properties measurementsFluorescenceElectric machine
The invention discloses a transformer oil leakage detection method and device based on polarization-ultraviolet fusion imaging, and the device comprises a housing, a support, a camera, an environment induction device, an overall controller, a power supply, a polaroid rotating wheel assembly, a lens seat assembly, and an image processor. And the motor driver, the illumination intensity sensor, the ultraviolet irradiance sensor, the image processor and the power supply are electrically connected with the integral controller respectively. According to the invention, a multi-angle polarization image and a non-polarization image in the same field of view can be acquired, and then polarization characteristics contained in an oil stain fluorescence signal are extracted and effectively distinguished from non-polarization characteristics of background light; in the daytime mode, the transformer oil leakage detection device can identify a target area with relatively high polarization intensity, and through image fusion enhancement processing, non-target background signals are significantly suppressed, and the fluorescence significance of an oil leakage characteristic area is improved.
Owner:BEIJING INST OF TECH
Terahertz refractive index-optical rotation common-optical-path joint measurement method and system based on quantum weak value amplification effect, and application of system
PCT designated stage expiredWO2025039232A1Material analysis by optical meansTime domainRefractive index
Disclosed in the present application are a terahertz refractive index-optical rotation common-optical-path joint measurement method and system based on a quantum weak value amplification effect, and an application of the system. The method comprises: performing pre-selection, wherein a polarization state α of an incident terahertz wave emitted by a terahertz time-domain spectral unit is used as a pre-selected quantum state, the polarization state α being selected by means of a first polarizer; performing post-selection, wherein a polarization state α+π2 selected by means of a second polarizer is used as a post-selected quantum state; before measurement, making the post-selected quantum state and the pre-selected quantum state orthogonal to each other; and performing two instances of common-optical-path joint weak coupling, wherein two instances of weak coupling are sequentially performed on the terahertz wave and a sample to be subjected to measurement that is on a common-optical-path joint measurement unit. In the present application, the high-sensitivity characteristic of quantum weak measurement in which a signal is amplified but technical noise is not amplified is used, and by means of common-optical-path joint measurement, the refractive index and optical rotation of a measured chiral drug can be jointly measured with high sensitivity, without the need to change an optical path, thereby realizing high-sensitivity conformation recognition of the chiral drug.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Large-size wafer thinning and polishing device and method based on dynamic line beams
The invention discloses a large-size wafer thinning and polishing device and method based on a dynamic line beam, and the device comprises a dynamic beam generation module, a rotary bearing module and a closed-loop control module, and the dynamic beam generation module comprises a laser, a polaroid, a line beam shaping assembly, a reflector, a hollow conical lens and a lifting module. The linear beam shaping assembly is used for shaping a laser beam into a line-shaped linear beam, the hollow conical lens is a hollow conical lens with an open end face and is used for shaping the line-shaped linear beam into an arc-shaped linear beam, and the hollow conical lens is installed on the lifting module to generate a dynamic arc-shaped linear beam; the rotary bearing module is used for fixing and driving a wafer to rotate; and the closed-loop control module is used for controlling the lifting of the lifting module and the movement of the rotary bearing module. The polishing speed can be greatly increased, the polishing uniformity and the polishing quality are also improved, a plurality of wafers can be thinned and polished at the same time, and the polishing device can adapt to wafers of different sizes and shapes.
Owner:GUANGZHOU SANYI LASER TECH CO LTD
Multiscopic display using multiscopic optical element with multiple liquid crystal layers
ActiveUS12313936B1Input/output for user-computer interactionStatic indicating devicesDisplay devicePolarizer
A display device includes a first liquid crystal (LC) layer and a second LC layer arranged between a backlight unit and a linear polarizer, and a multiscopic optical element arranged between the first LC layer and the second LC layer. Drive signals for LC cells of the first LC layer and the second LC layer are generated, based on corresponding images to be presented to each eye of each individual user, a relative location of each eye with respect to an image plane of the display device, and relative positions of the LC cells of the first LC layer and the second LC layer with respect to multiscopic cells of the multiscopic optical element. The LC cells are controlled using the drive signals, to adjust a polarization of light passing therethrough, for producing a synthetic light field presenting the corresponding images to each eye of each individual user.
Owner:DISTANCE TECHNOLOGIES OY
Polaroid film mounting machine and polaroid film mounting method
The present invention discloses a polarizer mounting machine, comprising: a first conveying mechanism for transporting a substrate to be mounted; an adsorption device, arranged on the first conveying mechanism, for adsorbing a polarizer body and horizontally attaching the adsorbed polarizer body to the substrate to be mounted; a second conveying mechanism, arranged on the right side of the first conveying mechanism, for transporting the substrate to be mounted with the polarizer body attached; a rolling compacting mechanism, arranged on the second conveying mechanism, for rolling and compacting the substrate to be mounted with the polarizer body attached during the transmission process. The present invention integrates the functions of automatic transport, automatic adsorption, automatic bonding and automatic rolling, has a high degree of automation, can greatly reduce the steps of polarizer mounting, reduce the difficulty of polarizer mounting, and can flexibly control the holding force of the compacting roller, thereby improving the polarizer mounting effect and efficiency.
Owner:SHENZHEN QIANHAI YUZHUO TECH CO LTD
Low-color-difference transparent display device
The invention provides a low-chromatic-aberration transparent display device in order to solve the problem that chromatic aberration easily occurs in polarization modulation stereoscopic display adopting a 1 / 4 wave plate. The low-color-difference transparent display device comprises a directional polarization light source, a reflector and a transparent liquid crystal display panel. The pixels on the upper portion of the 2D display panel are lightened in a time-division multiplexing mode and any time slice slot, light rays of the pixels are projected through the lens array and then reflected through the reflector, the polarization direction of the light rays is adjusted, and then the light rays penetrate through the transparent liquid crystal display panel to form viewpoints. The transparent liquid crystal display panel synchronously provides a parallax image corresponding to the viewpoint position. The sub-pixel value of any one lightened pixel on the 2D display panel is modulated to be a fixed value related to the included angle of the lens, so that colored light generated by the pixel is restored to be white light after being polarized by the polarizer, the polarization direction is adjusted by the 1 / 4 wave plate and the polarization of the analyzer. At the moment, a directional light source without chromatic aberration is provided for the transparent liquid crystal display panel, so that chromatic aberration introduced by the polaroid and the wave plate is reduced.
Owner:XIANYI INTELLIGENT CONTROL TECHNOLOGY (SHENZHEN) CO LTD
Extensible multi-path beam combining laser assembly and laser
The invention discloses an extensible multi-path beam combination laser assembly and a laser, and relates to the technical field of laser beam combination. The extensible multi-path beam combining laser assembly comprises a half-wave plate, a reflecting element, a polaroid, a Q switch, a controller and 2n basic lasers. The basic laser can output initial pulse laser with the polarization direction being the first direction, every two of the 2n initial pulse laser beams can be combined into 2n-1 pulse laser beams, and every two of the 2n-1 pulse laser beams can be combined into 2n-2 pulse laser beams until the 2n pulse laser beams are combined into one beam of output pulse laser. When the Q switch is turned on, the polarization direction of the pulse laser penetrating through the Q switch can be deflected by 90 degrees. When the pulse laser beams are combined, the first pulse laser beam passes through a Q switch and a reflecting element which are arranged along the light path of the first pulse laser beam, the polarization direction is the first direction or the second direction, and the first pulse laser beam is reflected to a polaroid arranged along the light path of the second pulse laser beam to be combined. Therefore, beam combination of multiple paths of laser is achieved, and even if light path faults exist, the multiple paths of laser after beam combination can be output.
Owner:GRACE LASER TECH CO LTD
Device and method for low-thermal-damage laser stripping and cutting of transparent material
The invention discloses a device and a method for low-thermal-damage laser stripping and cutting of transparent materials, the device comprises a laser, and a first half-wave plate, a linear polarizer, a beam expander, a second half-wave plate, a vortex wave plate and a processing objective lens which are sequentially arranged along the laser transmission direction, and emergent light of the processing objective lens enters a processing material; a machining material is adsorbed and fixed to the cooling suction cup, and the cooling suction cup is installed on the three-dimensional moving platform. Light subjected to polarization modulation is focused into a material through the objective lens to be modified, a complete modified layer is formed along with movement of the three-dimensional platform, the device and the method have the advantages of low thermal damage and high precision when being used for stripping and cutting, and material loss caused in the laser machining process can be reduced.
Owner:BEIJING UNIV OF TECH +1
Polaroid laminating integrated jig
Owner:CHUZHOU TONGLI PHOTOELECTRIC CO LTD
Multi-dimensional random number generator and multi-dimensional random number generation method
The invention discloses a multi-dimensional random number generator and a multi-dimensional random number generation method. The multi-dimensional random number generator comprises a single photon source, a polarization beam splitter, a 50: 50 beam splitter, a first single photon detector, a second single photon detector, a third single photon detector, a photon counter and a control processing module. Extraction and conversion of polarization correlation randomness, path correlation randomness and time correlation randomness are completed in the same system, the quantum random number sequence based on multiple principles is generated, the multi-dimensional quantum random number sequence is generated through a characteristic joint coding method, the randomness is higher, and the quantum random number sequence is more uniform. Extra chip hardware is not needed to provide computing power and post-processing operation, and the process is simpler, more efficient and more stable. In addition, the multi-dimensional random number generator provided by the invention is simpler and more compact in structure, and the entropy source utilization efficiency and the device damage resistance of the quantum random number generator are improved.
Owner:HEFEI SIZHEN CHIP TECH CO LTD
All-optical logic operation system and operation method based on metasurface device
ActiveCN120742601AOptical analogue/digital convertersLogic circuits using opto-electronic devicesLogical operationsMiniaturization
The invention discloses an all-optical logic operation system and operation method based on a metasurface device, and mainly solves the technical problems that an existing optical logic gate is high in system complexity, not visual enough in judgment result, high in recognition difficulty, poor in practicability and the like. The logic operation system comprises a polaroid, an object plane, a metasurface device and a detector which are arranged in sequence. The polarizer is used for adjusting the polarization direction of incident light; a plurality of transparent target areas with different shapes are arranged on the object plane and are used for placing corresponding target images; the centers of all the target areas are uniformly distributed on a circle with the center of the object plane as the circle center and d as the radius; incident light reaches the metasurface device after passing through the polaroid and a target image on the object plane, optical logic operation is carried out through the metasurface device, and then the incident light is output to the detector for imaging. The invention has the advantages of simple structure, quick function switching, miniaturization, high integration and the like.
Owner:XIAN INST OF OPTICS & PRECISION MECHANICS CHINESE ACAD OF SCI
Polarization spectrum modulation type multispectral stereo imaging method
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.
Owner:XIDIAN UNIV
Display assembly and electronic device
This application provides a display assembly and an electronic device. The display assembly includes: a display panel, a polarizer, and a heat dissipation film. The display panel includes a substrate and a plurality of light emitting devices located on a side of the substrate. The polarizer is located on a side of the light emitting device away from the substrate. The heat dissipation film is located on a side of the display panel away from the polarizer. The polarizer includes at least one electrostatic dissipation layer, or the heat dissipation film includes at least one electrostatic dissipation layer. The electrostatic dissipation layer is configured to guide static electricity into the electrostatic dissipation layer.
Owner:HUAWEI TECH CO LTD
Plate defect identification and detection method based on image identification model
The invention relates to the technical field of image recognition, in particular to a plate defect recognition and detection method based on an image recognition model. The method comprises the following steps: aiming at the technical problems of insufficient texture direction identification precision and difficulty in defect type distinguishing in a traditional plate surface detection method, the invention provides an intelligent detection solution based on polarization imaging. A multi-angle polarization measurement system is constructed through a fixed polarizer and a rotatable analyzer, and omnibearing polarization characteristic collection of the surface of a steel plate is achieved. A polarization intensity change model is established based on the Malus law, the polarization degree and polarization angle parameters of each pixel point are extracted, and a polarization parameter spatial distribution diagram reflecting the surface microstructure is constructed; through statistical analysis of polarization angle distribution characteristics, a rolling direction dominant angle is identified by adopting a peak detection algorithm, and accurate classification and severity evaluation of defects are realized in combination with anisotropy characteristic analysis.
Owner:QINGDAO WEIDE FANGSHENG METAL TECH CO LTD
Liquid crystal display device
A liquid crystal display device includes a first substrate, a liquid crystal layer, a second substrate, a retardation layer, and a polarizer in this order from a back face side, and includes a plurality of pixels arrayed in a matrix shape, in which the first substrate includes a reflective layer that reflects light, a first electrode and a second electrode that are capable of generating a transverse electrical field in the liquid crystal layer, and a first horizontal alignment film that is in contact with the liquid crystal layer, the second substrate includes a second horizontal alignment film in contact with the liquid crystal layer, the liquid crystal layer has a twist alignment when no voltage is applied, and the retardation layer includes a λ / 4 plate, a λ / 2 plate, and a positive C plate.
Owner:SHARP DISPLAY TECHNOLOGY CORP