491 results about "Optical transmittance" patented technology

The invention relates to the technical field of protective film preparation, and particularly discloses an antistatic silica gel protective film and a preparation method thereof.The protective film comprises a base material layer and an antistatic coating coated on the surface of the base material layer; the base material layer is prepared from methyl vinyl silicone rubber, modified fumed silica, a compound antistatic agent A and a vulcanizing agent, and the antistatic coating is prepared from a compound antistatic agent B and water-based acrylic resin. The preparation method comprises the following steps: banburying, calendering and vulcanizing a compound antistatic agent A, methyl vinyl silicone rubber and modified fumed silica to form the base material layer; and finally, mixing the compound antistatic agent B with water-based acrylic resin to prepare an antistatic coating solution, coating the surface of the base material layer with the antistatic coating solution, and drying and curing to obtain a finished product. The silica gel protective film prepared by the invention has excellent antistatic property, mechanical property, adhesive force and high light transmittance, and is suitable for the fields of electronic equipment screens, optical lenses and the like.

Appearance detection equipment for optical lens production relates to the technical field of optical lens detection and comprises a rack, a PLC is installed on the side face of the rack, a detection table is rotationally connected to a base of the rack through a rotating shaft, and a driving mechanism for driving the rotating shaft to rotate is installed on the base of the rack. Placing grooves are uniformly formed in the detection table, a receiving source and a light transmittance measuring instrument are installed at the positions, corresponding to the placing grooves, of the rack, the receiving source and the light transmittance measuring instrument are correspondingly arranged up and down, a position adjusting mechanism is installed at the top of the rack, and an optical lens taking and placing unit is installed on the adjusting part of the position adjusting mechanism; according to the appearance detection equipment for optical lens production, feeding and discharging of optical lenses are convenient, the trouble of manual operation is avoided, time and labor are saved, and therefore the detection efficiency is improved.

The invention belongs to the technical field of modified plastics, and particularly relates to a high-reflection low-transmittance polypropylene composite material as well as a preparation method and application thereof. The invention provides a novel polypropylene composite material formula, which comprises homo-polypropylene, precipitated barium sulphate, hollow glass beads, maleic anhydride grafted polypropylene and a hyperbranched polymer dispersant, through selection and synergistic effect of the specific components, the reflectivity of the obtained polypropylene composite material is significantly improved, the light transmittance is greatly reduced, and the polypropylene composite material has a good application prospect. Good mechanical properties and high-whiteness surface appearance are kept, and the high-whiteness optical fiber can be widely applied to the field of various optical products.

The invention discloses a double-layer acrylic acid OCA optical adhesive for a folding screen and a structural characterization method of the double-layer acrylic acid OCA optical adhesive, and belongs to the technical field of optical adhesives. The OCA optical cement comprises an upper high-creep layer and a lower high-recovery layer, and an intersoluble cross-linked structure is formed on the interface of the two layers through a gradient curing process. The upper layer formula contains 70-90 parts of 2-ethylhexyl acrylate and 10-30 parts of hydroxy butyl acrylate; the formula of the lower layer comprises 20-35 parts of isobornyl acrylate, 50-70 parts of 2-ethylhexyl acrylate and 5-15 parts of hydroxy butyl acrylate. And the longitudinal crosslinking density gradient is represented by adopting a unilateral nuclear magnetic resonance depth analysis technology. The contradiction between high adhesion and high resilience of the folding screen OCA is solved, high light transmittance, low haze, high stripping force and high creep recovery rate are achieved, and the resistance change rate is remarkably reduced after dynamic folding.

The application provides a fingerprint identification device with small thickness and low cost and an electronic terminal. The fingerprint identification device comprises an optical film and an image sensor arranged along a first direction and at a first distance. The optical film comprises a first area and a second area with different light transmittances, and the first area and the second area form a first pattern. When the optical film receives light reflected from a first object, the optical film converts the light into an optical image with the first pattern and transmits the optical image to the image sensor. The image sensor is configured to receive an optical signal in the optical image and convert the optical signal into an electrical signal, and the electrical signal is used to construct an image of a surface of the first object reflecting the light. In an embodiment of the application, an electronic terminal comprising the aforementioned fingerprint identification device is provided.

The invention belongs to the technical field of femtosecond laser processing, and particularly relates to a femtosecond laser-based surface bulging out-of-focus lens processing method, which is used for processing a micro-lens array with the out-of-focus amount continuously changing from the eye side to the temporal side based on a plurality of bulging units. The cavity structure is machined below the bulging unit based on multiple laser control, the cavity structure provides a preset transformation foundation for subsequent secondary machining, the bulging unit is conveniently converted into a micropore structure, and after conversion is completed, the light transmittance does not obviously change. Under the condition that the light transmittance meets the requirement, the vision correction defocus lens which better meets the requirement for the real defocus amount of the retina and can prolong the service cycle after secondary processing is achieved.

The invention discloses an optical film, a preparation method thereof and a display device, and relates to the technical field of optical functional films. The optical film comprises a base film layer and an antistatic coating arranged on the surface of at least one side of the base film layer. The antistatic coating comprises the following raw material components: water-dispersible polyester resin, water-soluble resin, a cross-linking agent and an antistatic agent; the antistatic agent is obtained by compounding a single-walled carbon nanotube modified with a hydrophilic group and polyaniline acid, the antistatic agent comprises an inner core and a coating layer at least partially coating the inner core, the inner core comprises the single-walled carbon nanotube modified with the hydrophilic group, and the coating layer comprises the polyaniline acid. According to the optical film, the single-walled carbon nanotubes and the polyaniline acid form a composite conductive structure, and then the composite conductive structure is crosslinked with the water-soluble resin and the crosslinking agent to form a three-dimensional conductive network structure, so that the optical film obtains lasting and efficient antistatic performance with extremely low environmental humidity dependence on the premise of keeping high light transmittance, low haze and good coating adhesiveness.

The invention provides a dental diaphragm with stress relaxation resistance as well as a preparation method and application thereof, and relates to the technical field of orthodontic materials. The dental diaphragm resistant to stress relaxation comprises a branched modified copolyester diaphragm, wherein the branched modified copolyester film is prepared from the following raw materials: terephthalic acid, alicyclic structure dihydric alcohol, side group dihydric alcohol and a polyfunctional group branching agent; wherein the glass transition temperature of the branched modified copolyester film is more than or equal to 80 DEG C, the light transmittance of the branched modified copolyester film is more than or equal to 86%, and the 24-hour tension attenuation rate of the branched modified copolyester film is less than or equal to 20%. The dental diaphragm provided by the invention has excellent tensile attenuation resistance, heat resistance and optical performance, is simple in processing technology, is more suitable for clinical requirements of dental orthodontic correction, and is particularly suitable for preparing dental orthodontic correction devices.

The invention relates to the technical field of polyimide film preparation, in particular to a high-light-transmittance polyimide film and a preparation method thereof.The preparation method comprises the following steps that aromatic diamine monomers are subjected to vacuum drying and then dissolved in an organic solvent, dianhydride monomers are slowly and dropwise added after the temperature is increased, a polyamide acid solution is obtained through segmented temperature control curing, and a polyimide film is obtained; performing vacuum defoaming on the solution, coating a substrate with the solution, performing gradient heating imidization treatment to obtain a film crude product, and performing plasma surface treatment and inert atmosphere annealing to obtain the high-light-transmittance polyimide film. According to the preparation method, conventional monomers are adopted, through optimization of drying, polymerization, defoaming, film forming, imidization and post-treatment process parameters, introduction of special structural monomers or external filler adding is not needed, the process is simple, the cost is low, the preparation method is suitable for large-scale production, and the prepared polyimide film is high in light transmittance at the wavelength of 550 nm and high in transparency. The optical uniformity, the surface flatness, the thermal stability and the mechanical property are excellent.

The application discloses a light diffusion plate foaming light-weight structure and a preparation method thereof. The structure comprises upper surface layer, first foaming layer, second foaming layer and lower surface layer connected in sequence. The thickness of the first foaming layer is less than that of the second foaming layer, and the average cell diameter of the first foaming layer is less than that of the second foaming layer. The application adopts the combination of the first foaming layer with small cell diameter and thin thickness and the second foaming layer with large cell diameter and thick thickness, improves the structure of the foaming light diffusion plate, and makes the density of the foaming light diffusion plate as low as 0.3 g / cm 3 , which is 50% lower than 0.85 g / cm 3 of the prior art, and the cost is significantly reduced, so that the application has obvious advantages in market competition. The average density, light transmittance and haze of the light diffusion plate can be regulated by adjusting the thickness or the average cell diameter of the first foaming layer and the second foaming layer.

This invention provides a photocatalytic composite nanoenzyme self-cleaning coating, its preparation method, and its application. Specifically, it includes: preparing solution A with Ca(NO3)2·4H2O and nano-cerium oxide; preparing solution B with (NH4)2HPO4 and hexadecyltrimethylammonium bromide; mixing solutions A and B, and reacting at high temperature to obtain cerium oxide nanoenzyme / hydroxyapatite microspheres; and using (NH4)6Mo7O... 24 Solution M is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solution N is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solutions M and N are mixed to obtain a precursor; the precursor is reacted with cobalt oxide at high temperature to obtain Co / Fe2(MoO4)3; tetraethyl orthosilicate, anhydrous ethanol, deionized water, and ammonia are mixed and sealed for aging; after adding a modifier, it is mixed with cerium oxide nanoenzyme / hydroxyapatite microspheres and Co / Fe2(MoO4)3, sprayed onto the obtained composite coating, and cured at high temperature to obtain a self-cleaning coating. This invention, by loading a photocatalyst and nanoenzyme / hydroxyapatite microspheres onto the surface of a modified SiO2 gel, effectively improves the photocatalytic activity and self-cleaning performance of the coating while maintaining good optical transmittance.

To provide a surface protection film and optical component that are less prone to an increase in surface resistivity and that are easy to inspect visually. [Solution] The surface protection film 10 comprises a base film 1 made of a transparent resin, an antistatic layer 2 formed on one side of the base film 1, and an adhesive layer 3 formed on the side of the base film 1 opposite to the antistatic layer 2. The antistatic layer 2 contains nanocarbon. The thickness of the antistatic layer 2 is 0.05 μm or more and 1.50 μm or less. The haze value of the surface protection film 10 is 4.0% or less. The total light transmittance of the surface protection film 10 is 80.0% or more.

This application provides a machine vision-based intelligent detection method for surface defects in protective films, comprising: extracting stress concentration areas and touch signal attenuation features from potential risks of touch response delay; performing group analysis on the stress concentration areas and touch signal attenuation features to obtain a joint attenuation trend of optical transmittance and touch signal attenuation; identifying the deformation degree of stress concentration areas and determining the touch signal attenuation degree of folding areas based on the joint attenuation trend of optical transmittance and touch signal attenuation to assess the durability of the folding screen; extracting early warning indicators for screen curvature radius and light scattering intensity defects from the attenuation trend prediction results, and generating a complete report including optical transmittance and touch signal attenuation defects.

The application relates to the field of four-silver coated glass, and particularly discloses a colorless four-silver LOW-E glass, which comprises a glass substrate and a composite film layer deposited on the surface of the glass substrate; the composite film layer is a four-layer silver coating structure formed by compounding SiNx, AZO, NiCr, Ag, ZnAlOx and ZnSnOx in a predetermined order; the thickness of each film layer is accurately controlled; the glass obtained has the following parameters: the glass surface color parameters are Rg=5.7, a*=-0.8 and b*=0.8; the film surface color parameters are Rf=3.9, a*=-1.4 and b*=-0.7; the visible light transmittance T is 67.5%; and the transmittance color parameters are a*=-4.5 and b*=-4.5. The glass surface and the film surface are both colorless, the glass has high light transmittance, and the colorless appearance and the optical transmittance performance are both considered.

There is disclosed an antibacterial glass composition, a preparing method of an antibacterial glass coating film using the same and an electric home appliance including the same. The antibacterial glass composition according to the present disclosure and the antibacterial glass coating film using the same are applied to an electric home appliance, thereby exhibiting excellent antibacterial properties and heavy metal elution safety, and exhibiting excellent transmittance (70% or more) when applied to a transparent glass substrate.

An electronic paper display includes a surface cover plate, a lighting module, a first optical adhesive layer, an electronic paper display module and a second optical adhesive layer. A peripheral area of a bottom surface thereof is provided with a black bezel formed by an opaque or low-light-transmittance material. The bottom surface is disposed with a low-refractive-index transparent resin layer. The lighting module has a light guide plate and multiple point light sources. The point light sources are disposed outside an outer edge of the light guide plate. The lighting module is disposed under the surface cover plate. The first optical adhesive layer glues the surface cover plate and the lighting module. The electronic paper display module is disposed under the lighting module. The second optical adhesive layer glues the lighting module and the light guide plate of the lighting module.

An image processing method and related apparatuses are provided. The method includes: converting colors of pixels of a foreground image into optical signals under a second color display standard to obtain a first optical signal set; converting the optical signals in the first optical signal set according to the conversion coefficient to obtain a second optical signal set; converting colors of pixels of the background image into optical signals under the second color display standard to obtain a third optical signal set; fusing optical signals in the second optical signal set and the third optical signal set based on a light transmittance of the foreground image to obtain a fourth optical signal set; and converting optical signals in the fourth optical signal set into colors in the second color space to obtain the fused image of the foreground image and the background image.

A translucent illuminated bunk cover for a boat trailer comprises a translucent ride pad having a unique optical transmittance curve that is linear across the visible spectrum, resulting in a wavelength neutral gray color. In one embodiment, the bunk cover has an outside leg having a generally planar body and longitudinally extensive ribs; a translucent ride pad having a crest and a plurality of longitudinally extensive ribs; and an inside leg having a generally planar body and longitudinally extensive ribs. In one embodiment, the trailer comprises a wheel set; a lateral framing member; and a pair of bunks extending longitudinally generally parallel with a longitudinal axis of the trailer. A groove is formed within a top surface of each one of the pair of bunks that is visible from above. At least one light source is located within the grooves, and a drain hole is also provided within the grooves.

The invention belongs to the technical field of variable optical films, discloses a multifunctional composite variable optical film and a preparation method thereof, and aims at solving the problems that an existing variable optical film is single in function, unstable in optical performance, poor in flexibility and bending resistance and low in process precision. The preparation method comprises the following steps: pre-treating the base material: sequentially carrying out plasma cleaning on the PET base material and sputtering the ITO conductive layer, sequentially carrying out ultrasonic cleaning on the glass substrate and preparing the YAG powder enhancement layer; the coating of the functional layer is that the surface of the ITO layer of the PET-ITO composite base material is coated with a PDLC layer and an electrochromic layer, and the surface of the YAG layer of the YAG-glass composite base material is coated with a temperature-sensitive layer; the compounding and curing are as follows: firstly laminating after aligning and compounding, and then carrying out UV segmented curing. The light transmittance of the product can be adjusted by 5-95% in an electric field, and the infrared reflectivity is gt; and after the ITO layer is bent for 1000 times and the bending radius is 5mm, the resistance change rate is less than or equal to 10%, so that the ITO film is suitable for a sunshade film for a vehicle and an intelligent window of a building.

This invention discloses a liquid crystal filter-based lidar chopping device for atmospheric wind and temperature detection, comprising a digitally controlled voltage output module, a liquid crystal module, a light guide module, a timing control module, a polarization beam splitter module, a frequency discriminator module, a reference channel photodetector, a frequency discriminator channel photodetector, a photon counting and acquisition card, a computer, a pulsed laser, a telescope, and a collimation module. This invention also discloses a liquid crystal filter-based lidar chopping method for atmospheric wind and temperature detection. This invention solves the problem of atmospheric wind and temperature detection being limited by the dynamic range of the photodetector; the received signal attenuation amplitude can be adaptively adjusted in real time, better adapting to weather changes. Furthermore, although liquid crystal filtering introduces some signal loss, wind and temperature detection typically uses the ratio of the reference channel and frequency discriminator channel signals for inversion, so the final result is independent of the liquid crystal's transmittance, thus avoiding the negative impact of liquid crystal filtering.

This invention discloses an impact-resistant and explosion-proof protective eyewear composite material and its preparation method, belonging to the field of protective eyewear technology. The impact-resistant and explosion-proof protective eyewear composite material of this invention comprises the following components by weight: 70-100 parts of modified UV-resistant polycarbonate, 2-8 parts of modified inorganic nanoparticles, and 8-20 parts of Ph-PBS-HR. The rigid modified inorganic nanoparticles, together with the modified UV-resistant polycarbonate and the flexible Ph-PBS-HR, work synergistically to give the protective eyewear high impact and explosion-proof capabilities. The symmetrical benzene rings in the main chain of the modified UV-resistant polycarbonate and Ph-PBS-HR reduce self-scattering and interface scattering, reducing haze and improving the light transmittance of the protective eyewear. The introduction of UV-resistant functional components into the modified UV-resistant polycarbonate reduces the risk of yellowing due to UV aging.

The application discloses a double-color injection molding IML forming process with a character pattern suspended in a middle layer, breaks through the bottleneck that a traditional suspended pattern needs to be printed on the back of a transparent piece and limits the back structure design. By silk-screening a character pattern on the front of a PC film piece, covering a non-character area with a black primer and filling a high-transmittance white ink, and setting a precise positioning hole and structure in the back black area, the pattern suspension three-dimensional effect is realized, and interference with the appearance of the product is avoided; in combination with a double-color transparent injection molding process, a first layer of transparent PMMA material is injected and fused and solidified with the character area, and a second layer is injected at the bottom of the transparent film piece, so that the character is suspended in the transparent interlayer, and visual impact is achieved.

According to the image acquisition method and device, the electronic equipment and the computer readable storage medium provided by the embodiment of the invention, if it is detected that stroboflash exists in the acquired image, the power frequency period of the light source is acquired, and the optional value of the exposure time in the target image acquisition parameters is set as the integral multiple of the power frequency period of the light source; determining the stroboscopic degree and the subject probability of each unit area in the acquired image; for each unit area, calculating a target light transmittance corresponding to the stroboscopic degree and the subject probability; and setting each color changing area in the electrochromic layer to be the target light transmittance of the corresponding unit area. When the stroboscopic phenomenon is detected, the exposure time is limited to be the integral multiple of the power frequency period of the light source, so that the stroboscopic phenomenon is eliminated, and the light transmittance of the corresponding color changing area is specifically determined according to the stroboscopic degree and the subject probability of the specific unit area in the image acquisition parameters. And the reduction of image quality caused by exposure time adjustment is avoided.

The invention discloses a super-hydrophobic anti-reflection composite optical film for AR glasses and a preparation method and application of the super-hydrophobic anti-reflection composite optical film, and belongs to the technical field of display optical films. The super-hydrophobic anti-reflection composite optical film comprises an optical substrate layer, a silicon-based anti-reflection bottom layer and a self-repairing super-hydrophobic functional layer; the preparation method comprises the following steps: 1) pretreating the optical substrate layer; 2) preparing a silicon-based anti-reflection bottom layer; (3) preparing a pre-polymerization solution of the self-repairing super-hydrophobic functional layer; and 4) coating and curing the self-repairing super-hydrophobic functional layer. The coating is endowed with intrinsic self-repairing capacity by introducing the tellurium bond, unification of high light transmittance, super-hydrophobicity and excellent mechanical durability is achieved through cooperation of the hybrid anti-reflection design and the nano-composite structure, the method is suitable for AR lenses, and the technical bottlenecks that in a traditional scheme, an anti-reflection film is prone to cracking, the hydrophobic function is not resistant to abrasion, and self-repairing cannot be achieved can be effectively solved.

The invention discloses an on-line real-time monitoring and testing system and method for color difference of a colored film. The method comprises the following steps: acquiring a film image by adopting an optical detection module; the reflection calibration module compensates transmissivity fluctuation of the thin film through a reflection plate located below the thin film, and provides a calibration reference by means of a standard material and a calibration plate with the same height; the motion synchronization module realizes synchronization of high-precision camera acquisition and film motion so as to eliminate motion blur, and adjusts the light source intensity of the optical detection module based on the real-time light transmittance feedback of the film; and the data processing module dynamically updates a conversion matrix from RGB to LAB by using the data of the calibration plate so as to compensate system temperature excursion, obtain an E threshold value and generate a color difference distribution thermodynamic diagram. According to the invention, the problem of inaccurate chromatic aberration measurement caused by factors such as film light transmittance fluctuation, system temperature excursion and motion blur in the prior art is solved, real-time and accurate monitoring and rapid analysis of the film chromatic aberration in the production process are realized, and the method is suitable for film color quality control in a high-speed continuous production scene.

The invention relates to a transparent flame-retardant glass fiber reinforced polycarbonate material capable of being subjected to laser welding and a preparation method of the transparent flame-retardant glass fiber reinforced polycarbonate material. The transparent flame-retardant glass fiber reinforced polycarbonate material is prepared from the following components in parts by weight: 50 to 60 parts of silicon-containing polycarbonate resin, 10 to 40 parts of regenerated polycarbonate resin, 10 to 30 parts of HR glass fiber, 0.2 to 0.4 part of organic silicon microspheres, 0.1 to 0.3 part of a dispersing agent and 0.2 to 0.4 part of an antioxidant, the organic silicon microspheres are selected from one or more of sulfonate-containing organic silicon microspheres and quaternary phosphonium salt-containing organic silicon microspheres. The HR glass fibers and the organic silicon microspheres are cooperatively introduced into the material, so that the polycarbonate material simultaneously meets the requirements of flame retardance and high light transmittance, and the performance of ultrahigh near-infrared light transmittance and halogen-free flame retardance is obtained.

The application provides a high-refraction cycloolefin copolymer and a preparation method thereof, and has a structure of formula I. The cycloolefin copolymer can obtain a cycloolefin copolymer resin with high thermal stability due to high steric hindrance of the cycloolefin monomer. The refractive index of the cycloolefin copolymer resin is greatly improved due to R3 and R4 on the cycloolefin monomer, and is first broken through to above 1.70, while maintaining high light transmittance of 91.0-96.0%, extremely low water absorption (<0.01%), and a glass transition temperature of 219 DEG C. The application prepares the cycloolefin copolymer resin with high activity, adjustable molecular weight and glass transition temperature by adjusting the reaction conditions. The copolymer resin has high refractive index, high light transmittance, heat resistance, low birefringence and moisture absorption, excellent fluidity, moldability and dimensional stability.

The invention discloses a lens and a lens customization design method, belongs to the field of ophthalmosurgery devices, and is used for treating myopia, realizing compensation of ocular refraction, and realizing accurate quantification and design optimization of scattering performance by processing the lens through target angle resolution scattering distribution and target surface power spectral density based on the lens. And determining the target optical structure parameter of the lens based on the target optical performance parameter, thereby realizing quantitative correlation between the microstructure parameter and the optical performance of the lens, and improving the design credibility. Target angle resolution scattering distribution of the processed lens accords with ideal Lambert scattering characteristics, retina illuminance distribution is effectively homogenized, and local light intensity peak value is reduced, so that image signal contrast is reduced, high light transmittance is maintained, specific light scattering control is realized, visual comfort is remarkably improved, myopia is treated, asthenopia symptoms are relieved, and the lens has good application prospects. And scattering characteristic parameters can be adjusted according to different user requirements.

The invention relates to the field of high polymer materials, in particular to a high-definition perspective TPEE film, a preparation method and application. The invention discloses a high-definition perspective TPEE film which is prepared from the following components in percentage by weight: basic resin TPEE, a high-definition additive, a weather-resistant stabilizer, an antioxidant, an antistatic agent, an anti-scraping agent and a compatilizer, and further provides a preparation method of the TPEE film, the preparation method comprises the following steps: pre-mixing the components, performing melt blending through a twin-screw extruder, and finally forming the film through a tape casting method or a film blowing method, so as to obtain the high-definition perspective TPEE film. Meanwhile, the invention discloses application of the TPEE film in a high-definition display screen, a high-end packaging material or special optical equipment. The prepared TPEE film has high-definition perspective performance, the film thickness is 50-200 microns, the light transmittance is larger than or equal to 91%, the haze is smaller than or equal to 1.2%, the yellowing index delta b is smaller than or equal to 0.6, and the TPEE film has the effects of weather resistance, oxidation resistance, static electricity resistance, scraping resistance and the like.