5255 results about "Transmittance" patented technology

The invention discloses an improved YOLOv11-based high-reflection and high-transmittance material surface defect detection method, which comprises the following steps: S1, acquiring a mobile phone screen surface defect image, preprocessing and labeling, and generating a training data set containing three defects of scratches, edge breakage and cracks; s2, constructing a defect detection model; s3, averagely dividing an input image into four independent detection regions, adopting a bounding box overlapping area weight distribution strategy for cross-region defects, and performing partition counting on the image by using a defect detection model; s4, constructing a surface defect detection network meeting the real-time requirement of the industrial production line, and outputting a detection result and a processing frame rate; s5, pixel-level mask segmentation is carried out on the scratch defect, and contour coordinates and geometric features are extracted; and S6, fitting the actual damage size of the scratch defect on the surface of the high-reflection and high-transmittance material according to the segmentation result. According to the method, the detection speed is high under the condition that the accuracy is ensured, and a reliable solution is provided for surface flaw detection of the high-reflection and high-transmittance material.

The invention discloses a liquid crystal display screen defect detection method, and relates to the technical field of liquid crystal display screen defect detection.A bidirectional polarization transmission structure light source is adopted to project 0-degree and 90-degree polarized light, interference of parasitic reflection on defect detection is reduced, and a self-adaptive exposure control unit is introduced; exposure parameters are adjusted in real time according to the light transmittance and reflection characteristics of the glass substrate, the imaging quality is optimized, and the detection effect is prevented from being affected by overexposure or underexposure; in the image processing stage, parasitic reflection information is extracted by combining a polarization difference algorithm of double-frame subtraction, high-frequency interference is removed by using fast Fourier transform (FFT), an optimized defect image after parasitic reflection suppression is obtained, real defect information is more prominent, and the defect contrast is improved; multi-scale Gaussian fitting filtering, a gradient lifting method and super-resolution reconstruction are adopted to enhance defect features in the image, so that a low-contrast defect area is easier to identify.

The invention relates to the technical field of display screens, and discloses an anti-dazzle Micro LED display screen and an anti-dazzle adjusting method and system.The method comprises the steps that multi-dimensional spectral data collection is conducted on incident light, and a multi-dimensional spectral feature matrix is obtained; performing space-time light field reconstruction of tensor decomposition and spherical harmonic function expansion operation on the multi-dimensional spectral feature matrix to obtain four-dimensional light field feature data; inputting the four-dimensional light field feature data into a deep learning prediction network for dynamic modeling to obtain light field distribution prediction data; performing anti-dazzle display parameter optimization based on the light field distribution prediction data to obtain a display parameter target value; and executing a hierarchical control strategy according to the display parameter target value, and generating a multi-parameter cooperative control signal for light transmittance adjustment, polarization state modulation and microstructure actuation, the method realizes accurate conversion from the light field characteristics to the control parameters, ensures the stability and continuity of the display effect, effectively reduces the system energy consumption, and improves the operation efficiency.

The invention discloses an automatic testing device and method for multi-directional tensile strength of textiles based on constant tension, and relates to the technical field of tensile strength detection.The automatic testing device comprises a rigid rack system, and a high-elastic fabric optical response mechanism is integrated on a double-stand-column portal frame of the rigid rack system; the fiber damage process is reflected through the light transmittance of light to the fabric and the light spot change; the high-elastic fabric optical response mechanism comprises a sealing light insulation assembly, a light source assembly and an imaging assembly. The light source assembly comprises pulse LED light source arrays arranged at equal intervals in the fabric stretching direction, a lampshade and a transverse movement driving unit. The problems that in the prior art, when the tensile strength of a fabric is detected, only the limit value when a sample is completely broken can be recorded, and microcracks generated by step-by-step failure of fibers in the stretching process cannot be captured are solved. The device has the advantages that when the tensile strength of the fabric is detected, the fiber fracture process in the fabric is directly reflected through the change of light spots formed by light penetrating through the fabric, and the like.

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.

An optical combiner is employed to reflect a first part and a second part of a synthetic light field towards a first eye and a second eye of user(s), respectively, whilst optically combining the first part and the second part with a real-world light field. Portion(s) of the optical combiner from which a part of the synthetic light field is reflecting towards a given eye of a given user is determined, based on a relative location of the given eye with respect to the optical combiner. Portion(s) of active optical device(s) that corresponds to the portion(s) of the optical combiner are activated, to decrease transmittance of the real-world light field passing through the portion(s) of the optical combiner towards the given eye, and / or to increase reflectance of the synthetic light field being reflected by the portion(s) of the optical combiner towards the given eye.

The invention relates to ultrahigh-transmittance anti-reflection multifunctional coated photovoltaic glass and a preparation method thereof, and belongs to the technical field of photovoltaic glass, the photovoltaic glass comprises a photovoltaic glass substrate, the photovoltaic glass substrate is provided with a high-transmittance reflective coating, the high-transmittance reflective coating comprises a silicon dioxide layer, a titanium dioxide layer and a nanometer material layer, and the nanometer material layer is arranged on the silicon dioxide layer. The silicon dioxide layer and the titanium dioxide layer are arranged between the photovoltaic glass substrate and the nanometer material. The preparation method comprises the following steps: S1, preparing raw materials; s2, preparing a coating; s3, coating process; s4, performing surface treatment on the nano structure; s5, coating curing and surface treatment; and S6, testing and evaluating the performance. According to the ultrahigh-transmittance anti-reflection multifunctional coated photovoltaic glass, the performance and durability of a photovoltaic cell can be remarkably improved, by arranging the high-transmittance anti-reflection coating, the light transmittance of the photovoltaic glass is improved, the overall photoelectric conversion efficiency can be improved by 5-8%, and light reflection loss is remarkably reduced.

The invention discloses a method for improving the heat dissipation performance of an AlGaInP red light Micro LED chip. The method comprises the following steps: S1, preparing an epitaxial structure: processing a substrate and a buffer layer, growing an etching barrier layer and an ohmic contact layer, and carrying out stacking epitaxy on a functional layer; s2, patterning the silicon-based substrate: preparing a dielectric layer and a metal structure; s3, diamond ohmic contact layer integration: processing a p-type conductive diamond film layer, and carrying out metal reflection and bonding; s4, removing the substrate and forming an n-type structure: stripping the substrate to be in n-type contact; s5, back-end process integration: preparing an electrode and an optical structure; according to the invention, the heat dissipation performance of the chip is significantly improved; the series resistance is reduced by 30%-50%; the resistivity of the p / n type diamond ohmic contact layer is reduced by 1-2 orders of magnitude compared with ITO; gaAs material light absorption and metal shading are avoided, and the red light transmittance is improved from 75% to more than 90% by combining with the micro lens array; the method is compatible with existing MOCVD, CVD and photoetching processes, large-scale production of wafers of 2-12 inches can be achieved, and the manufacturing cost is reduced.

The invention relates to the technical field of semiconductor devices, in particular to an infrared photoelectric detector based on a super lens and a manufacturing method of the infrared photoelectric detector. The infrared photoelectric detector based on the super lens comprises a tube socket, a metal tube cap and a detector chip, the metal tube cap and the tube socket are fixedly connected and form a totally-enclosed packaging structure, the detector chip is packaged between the tube socket and the metal tube cap, a chip electrode of the detector chip is welded with a pin of the tube socket, the super lens is arranged at the top of the metal tube cap, and the super lens is arranged on the top of the metal tube cap. The side wall is a metal tube shell, and the super lens comprises a super lens substrate and super lens units periodically arranged above the super lens substrate. According to the infrared photoelectric detector based on the super lens, the super lens units periodically arranged on the super lens can be utilized, the transmittance of incident light can be improved, the interference effect of reflected light can be restrained, and then the detection rate of the infrared photoelectric detector is improved.

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.

The invention relates to the technical field of optical elements, in particular to a method for predicting damage evolution of an optical element based on laser irradiation, which comprises the following steps: firstly, acquiring physical parameters (oxygen-silica ratio, transmissivity and absorption coefficient) and laser irradiation parameters (wavelength, energy density and repetition frequency) of the optical element; mapping the relationship between the environmental parameters and the damage threshold; constructing an oxygen-silica ratio-transmissivity-damage threshold correlation model, and analyzing evolution of physical parameters along with laser emission; the method comprises the following steps: establishing a heat-light-force multi-physics field coupling model, exploring a damage mechanism, finally predicting damage threshold evolution of the optical element after irradiation of different lasers through the models, obtaining a damage threshold change trend curve and a critical damage point, and establishing a damage prediction model based on physical parameters. Therefore, the damage evolution of the optical element is predicted in advance, the experimental period is shortened, and the evaluation efficiency is improved.

The invention discloses a multi-probe on-line real-time film thickness measuring method and a multi-probe on-line real-time film thickness measuring device. In combination with the multi-wavelength analysis capability and multi-channel parallel signal characteristics of the spectrum detection unit, different plane positions are adopted to correspond to different wavelengths or central wavelengths, the transmissivity of each wavelength is obtained, and the thickness of the corresponding position is obtained respectively; the precision and the accuracy of obtaining the thickness by a single wavelength are improved through a multi-mode cooperative signal analysis algorithm, so that the thicknesses of a plurality of different positions of the same thin film are accurately obtained at the same time through one spectrum detection unit, or the thicknesses of a plurality of different thin films are obtained; according to the invention, the problems of large absorption, transparent or non-transparent substrate compatibility, quick response, multi-branch and on-line real-time measurement of the film are successfully solved; the device and the method can be integrated in film growth equipment to carry out rapid and high-precision measurement on the film, so that closed-loop control on film production is realized, the iteration speed is increased, the yield of high-quality film production is greatly increased, and the film production cost is saved.

A window for a sensing system is provided that includes: a substrate comprising an outer and an inner primary surface; an outer layered film disposed on the outer primary surface; and an inner layered film disposed on the inner primary surface. Each of the outer and inner layered films comprises alternating high index and low index layers. The outer layered film comprises a scratch resistant layer having a thickness from about 0.5 μm to about 10 μm, and exhibits a hardness of at least 11 GPa, as measured with a Berkovich Indenter Hardness Test. The window exhibits an average transmittance of greater than 85% within ±25 nm of at least one wavelength within the infrared spectrum from 900 nm to 1600 nm and an average transmittance of less than 5% in the visible spectrum from 420 nm to 650 nm, each at an angle of incidence<15°.

The invention relates to the technical field of fire coal control, and discloses a thermal power plant fly ash floating black online detection control method and system, and the method comprises the steps: 1, employing microwave, infrared and laser sensors for cooperative work, detecting carbon dielectric characteristics through microwave dust interference resistance, identifying thermal radiation difference through infrared, and analyzing particle distribution through laser; 2, on the basis of the detection requirements in the step 1, triple protection of air curtain barrier, ultrasonic cleaning and hydrophobic coating is designed, dust condensation is blocked, and it is ensured that the light transmittance of the sensor is larger than 90%; the invention provides a multi-mode sensing fusion-anti-interference current stabilization-closed loop optimization full-link solution for the industrial problem of signal distortion caused by optical window dew formation and dust deposition, airflow disturbance and environmental interference in fly ash floating black online detection. The light transmittance of the optical window is greater than 93% by combining triple protection of air curtain barrier, ultrasonic cavitation stripping and nano hydrophobic coating.

The invention relates to the technical field of meteorological cloud detection, and discloses a satellite-borne hyperspectral cloud layer identification method based on a dual-band fusion technology, and the method comprises the steps: firstly obtaining a hyperspectral image, carrying out the preprocessing of the hyperspectral image, and obtaining a spectrum calibration image; respectively calculating the visible light wave band transmittance and the near-infrared wave band transmittance of each pixel in the spectrum calibration image; identifying a semitransparent weather phenomenon area and a non-semitransparent weather phenomenon area according to the visible light wave band transmittance and the near-infrared wave band transmittance of each pixel; and finally, constructing a real cloud layer spectral feature model, performing real cloud layer identification on the non-translucent weather phenomenon area by using the model, and fusing the identified real cloud layer area and the translucent weather phenomenon area to generate a final cloud detection result graph. According to the method, spectral information of visible light and near-infrared wavebands is fused, a real cloud layer spectral feature model is constructed for cloud detection, and the cloud detection precision under complex atmospheric conditions is improved.

The invention discloses a photovoltaic POSS (polyhedral oligomeric silsesquioxane)-containing antireflection film coating liquid and a preparation method thereof, the coating liquid comprises the following raw materials in parts by weight: 80-100 parts of modified emulsion, 10-15 parts of modified graphene, 3-5 parts of sodium dodecyl benzene sulfonate, 1-3 parts of triethylene tetramine and 40-60 parts of deionized water, a modified additive in the coating liquid contains a polyhedral oligomeric silsesquioxane structure, the polyhedral oligomeric silsesquioxane structure can form uniformly-distributed nanopores and is matched with a two-dimensional honeycomb lattice structure in the graphene oxide, the surface roughness can be increased, the microstructure can scatter incident light and reduce specular reflection, so that the surface light transmittance is improved, and meanwhile, the modified additive molecule contains a fluoroalkyl structure, so that the surface light transmittance is improved. The fluoroalkane has a high refractive index, so that light reflection can be reduced, and the light transmittance is further improved.

The invention discloses a solar power generation integrated management system, equipment and method based on AI intelligence, and particularly relates to the technical field of photovoltaic power generation. By analyzing the light-induced attenuation data of the photovoltaic module, judging whether the light-induced attenuation of the photovoltaic module has reversibility or not by using a convolutional neural network; based on the light intensity change data of the cloud layer edge light intensity abrupt change area, the influence degree of the cloud edge nonlinear shielding and reflection gain effect on the photovoltaic array power fluctuation is evaluated; and determining the working state of the photovoltaic module according to the judgment result of whether the light-induced attenuation is reversible and the evaluation result of the nonlinear shielding and reflection gain effect. When the assembly is in an abnormal working state, the non-linear attenuation influence degree of the aerosol retention layer on the light transmittance is evaluated by analyzing the light transmittance change. And whether an operation and maintenance scheme is started or not is judged according to the evaluation result, so that intelligent diagnosis and fine management of the operation state of the photovoltaic module are realized, and the operation efficiency and reliability of solar power generation are improved.

The invention provides an acoustic vortex tunneling transmission method based on topology pairing metasurfaces, and the method comprises the steps: respectively arranging an absorption type metasurface and an emission type metasurface which have opposite topological charges at an inlet and an outlet of a tunneling channel, forming a pair of topology pair TPMs structures, and forming a vortex tunneling system together with a sub-wavelength channel; mode conversion between vortex waves and plane waves is achieved through multi-period fan-shaped grooves etched in the angular direction and the radial direction, and the transmission efficiency is enhanced through Fabry-Perot resonance in a sub-wavelength channel. When the length of the tunneling channel meets specific conditions, periodical adjustment of transmissivity and perfect tunneling can be achieved, and the tunneling structure has high OAM mode coupling and transmission efficiency while guaranteeing the compact structure and low material cost. The metasurface designed by the invention supports diversified acoustic vortex tunneling transmission along a straight line and a curve, and shows excellent flexibility and stability.

The invention discloses a far-infrared band optical thin film, a preparation method thereof and an optical element, and relates to a far-infrared band optical thin film technology, the far-infrared band optical thin film comprises a substrate, a front band-pass film system and a back cut-off film system; wherein the front band-pass film system is located on one side of the substrate, and the back cut-off film system is located on the other side of the substrate; the far infrared band optical thin film is prepared by alternately depositing lead telluride serving as a high-refractive-index thin film material and cadmium telluride serving as a low-refractive-index thin film material. The far infrared band optical thin film can cut off the band with the wavelength smaller than 4 microns, and the average transmittance is 0.23%; anti-reflection is carried out at the wave band of 5-50 microns; the moisture-resistant performance is excellent.

The invention discloses a method for estimating the transmittance of a time-varying channel based on a frequency division multiplexing pilot frequency, and aims to solve the problem that the existing method for estimating the transmittance by adopting average transmittance does not have the capabilities of timely feedback and dynamic adjustment. The method comprises the following steps of: measuring a regular position component and a regular momentum component of a received signal by receiving a quantum signal and a pilot signal of frequency division multiplexing in a local local oscillator continuous variable quantum key distribution system generated by a transmitting end in real time; compensating phase noise caused by frequency offset and channel jitter due to different center frequencies of two independent lasers at a receiving end and a transmitting end by using a frequency offset compensation and phase recovery algorithm, and performing band-pass filtering to obtain a recovered pilot signal; and calculating the power ratio of the obtained pilot signal to the pre-calibrated pilot signal at each moment to obtain the time-varying free space transmittance. The performance change of the system in different time periods can be accurately reflected, the communication performance of the CVQKD system can be optimized, the success rate of key transmission can be improved, and the adaptability and robustness of the system can be improved.

The invention discloses a metasurface array antenna housing, belongs to the technical field of electromagnetic wave regulation and control, and solves the problem of how to improve the transmittance and absorptivity of a metasurface to electromagnetic waves. Electromagnetic waves with different frequencies resonate on the first metasurface wave-absorbing layer and the second metasurface wave-absorbing layer respectively, so that the electromagnetic waves are absorbed by the lumped resistor. And the metasurface wave-transmitting layer re-radiates electromagnetic waves of a communication frequency band to enable the electromagnetic waves to penetrate through the metasurface unit, and meanwhile, the surface of the metasurface wave-transmitting layer can serve as a metal floor of the first metasurface wave-absorbing layer and the second metasurface wave-absorbing layer due to copper coating. The antenna can be widely used in the scenes of radar stealth, communication antenna integration, electromagnetic compatibility, wireless energy transmission and the like, and has a good application prospect.

The invention belongs to the technical field of radar wave-absorbing materials, and discloses a double-sided wave-absorbing broadband stealth composite material and a preparation method thereof. The broadband stealth composite material with the double-sided wave absorbing function comprises a non-metal-based composite material body and at least five metamaterial layers arranged in the thickness direction of the non-metal-based composite material body at intervals. The number of the metamaterial layers is an odd number, a middle metamaterial layer is arranged in the middle of the metamaterial layers in the thickness direction, and the rest metamaterial layers are symmetrically distributed on the two sides of the middle metamaterial layer; the metamaterial layer comprises conductive pattern units which are periodically arranged; the relative dielectric constant of the nonmetal-based composite material body is not greater than 10; the double-sided wave-absorbing broadband stealth composite material does not contain a metal reflecting layer. When electromagnetic waves with the frequency of 1-18 GHz vertically enter the material, the transmissivity of the material is small (smaller than-13 dB, namely smaller than 5%), and meanwhile the material has low reflectivity in a broadband. And the preparation method is simple to operate and easy to realize large-scale production.

The invention discloses a diffractive optical waveguide and augmented reality display equipment. The diffractive optical waveguide comprises a waveguide substrate and a first grating and a second grating which are arranged on the waveguide substrate, the first grating is configured to couple input light carrying image information into the waveguide substrate and enable the input light to be propagated through total reflection, and the second grating comprises a diffractive relief structure and is configured to at least carry out pupil expansion on the light propagated to the second grating; the diffraction optical waveguide further comprises an optical film layer, the optical film layer at least covers the second grating and comprises a filling structure, and the filling structure fills gaps in the diffraction relief structure of the second grating and forms an overflow layer higher than the diffraction relief structure. The refractive index of the filling structure is larger than that of the environment medium and smaller than that of the second grating. According to the embodiment of the invention, the transmittance of ambient light in the grating area can be effectively improved, and the difference between the grating area and the non-grating area is reduced, so that the overall visual experience is improved.

A laminated pane with light source, includes an outer pane and an inner pane, a first thermoplastic film arranged between the outer pane and the inner pane, a functional element with electrically controllable optical properties, a darkened layer, a decoupling element for decoupling light from the inner pane, and a light source arranged on a side edge of the inner pane or in a recess of the inner pane for coupling light into the inner pane, wherein the darkened layer has at least one opaque region having a light transmittance of less than or equal to 50% and the opaque region is present at least within the region between the light source and the functional element.

The invention belongs to the technical field of nano porous materials, discloses a high-strength and low-thermal-conductivity SiC-TiO2 nanofiber aerogel and a preparation method thereof, and aims to solve the problems of insufficient structural stability, shear strength and high-temperature thermal conductivity of traditional ceramic aerogel. TiO2 nanorods are introduced onto a SiC nanofiber membrane by adopting an in-situ growth technology, and the high-strength and low-thermal-conductivity SiC-TiO2 nanofiber aerogel is prepared. And constructing the SiC nano composite fiber membrane into the layered porous ceramic nanofiber aerogel with a multilevel structure by combining a layer-by-layer stacking method with a directional freezing casting technology. TiO2 nanorods growing on the surface of the SiC fiber in situ serve as a secondary structure, so that the overall mechanical performance of the material is enhanced; the TiO2 nanorods have specific high infrared light reflection and scattering capabilities, so that the transmittance of the aerogel material to radiation is reduced, and the thermal radiation conduction in a high-temperature environment is effectively reduced. In addition, a silica sol binder is introduced between layers of the aerogel multilevel structure, stable bonding points are formed between fibers after calcination, and the mechanical stability is improved.

The invention relates to an indoor illumination adjustment method and device, a storage medium and electronic equipment, and relates to the technical field of illumination adjustment, and the method comprises the steps: obtaining a target exhibition article in an exhibition hall after the current time; determining at least one target crowd distribution sub-region of the target exhibition article after the current time; screening an optimal distribution sub-region from the target crowd distribution sub-regions, and determining a visual direction from the optimal distribution sub-region to the target exhibition article; the illumination directions from all intelligent windows in the exhibition hall to the target exhibition article are determined, a target illumination direction is selected from all the illumination directions, and the target illumination direction is the illumination direction with the direction similarity level of the visual direction exceeding a preset similarity level threshold value; and determining the intelligent window corresponding to the target illumination direction as a target window, and reducing the light transmittance of the intelligent windows except the target window. The method and the device have the effect of improving the indoor exhibition viewing experience of people.

The present invention relates to a flash-spun polyethylene film material with a good toughness and a manufacturing method therefor. The raw materials thereof comprise polyethylene. The gram weight G of the flash-spun polyethylene film material is greater than 50 g / m2; the initial toughness Z0 of the flash-spun polyethylene film material is 20-35 (N·m) / g; and Z0=[RM×EM+RT×ET] / G, wherein RM is the tensile strength in the MD direction, RT is the tensile strength in the TD direction, EM is the tensile elongation in the MD direction, and ET is the tensile elongation in the TD direction. The flash-spun polyethylene film material is exposed in a dry and hot atmosphere at 90ºC for 6 hours, and is then cooled under the conditions of a temperature of 25ºC and a relative humidity of 65% for 24 hours, and the light transmittance thereof is measured to be 8-13%. The testing of the light transmittance is performed according to GBT2410-2008, and the light transmittance is the ratio of the luminous flux of light penetrating a sample to the luminous flux of light emitted onto the sample, and is expressed as a percentage. The flash-spun polyethylene film material of the present application has a relatively good toughness.

The invention provides a control method and system of double-station transceiving integrated coupling equipment, and the method comprises the steps: obtaining defect coordinates and pinhole characteristic data of a target region, carrying out the analysis to obtain a transmittance abnormal region, generating an initial path of a spiral search algorithm according to the transmittance abnormal region, adjusting the search step size and angle, and obtaining a preliminary scanning boundary of a to-be-scanned region; analyzing the closeness degree of the scanning path and the defect, if the closeness degree is within a preset range, determining a power reduction condition according to the defect coordinate, adjusting the power, processing the light spot to obtain the size, and calculating a broadening coefficient; and extracting dynamic change data of the light spot size from the distributed power distribution, scanning the defect area to obtain a heat accumulation risk real-time distribution diagram, and dynamically adjusting the light spot size and power until the peak coupling power stability recovers to a preset range.

The invention discloses a visible infrared dual-band stealth material and a preparation method thereof. The material structurally comprises a metal Mo layer, a Ge dielectric layer and an Al2O3 dielectric layer, and the metal Mo layer, the Ge dielectric layer and the Al2O3 dielectric layer are sequentially laid from bottom to top. According to the method, the absorptivity, the refractive index and the transmittance of the thin film structure in visible light and infrared bands are calculated through combination of a transmission matrix and simulation software, and simulated absorption spectrums of the thin film structure in the visible light and infrared bands under the normal incidence condition are obtained; by changing the thickness of each layer of material in the thin film structure, different thickness absorption spectrums of the thin film structure in visible light and infrared bands are obtained through calculation; comparing the different thickness absorption spectrums with the simulated absorption spectrums to obtain an optimal thin film structure and the thickness of each layer of material; and according to the thickness of each layer of material of the optimal thin film structure, a target thin film structure is prepared by setting a preparation mode. The structure is simple, the manufacturing process is simplified, and preparation and large-scale integration are easy.

The utility model relates to an efficient and low-cost brightness enhancement film which is composed of a first base material layer, a low-refractive-index coating and a first prism layer, the first prism layer is arranged on the front face of the first base material layer, the low-refractive-index coating is arranged on the back face of the first base material layer, hollow nano-particles are mixed in the low-refractive-index coating, and the diameter range of the hollow nano-particles is 20-500 nm. By optimizing the diameter and the adding proportion of the hollow nanoparticles, the reflectivity of the light incident surface of the brightness enhancement film is effectively reduced, the light transmittance is improved, and the brightness of the brightness enhancement film is further enhanced. Meanwhile, the pencil hardness and the wear resistance of the back coating of the brightness enhancement film can be improved by introducing the hollow nanoparticles, and in the optimal design, the brightness enhancement film comprises an integrally-formed biprism layer structure with different prism extension directions and vertex angles, and the brightness enhancement film can be obtained by controlling parameters such as the size of the hollow nanoparticles, the size of the hollow structure and the thickness of the low-refractive-index coating. The brightness enhancement film can be manufactured at low cost, and is higher in efficiency and more excellent in performance.