188 results about "Optical transparency" patented technology

The invention discloses an optical monomer and a preparation method thereof, a composition, a resin material and a preparation method thereof. The optical monomer provided by the invention comprises a quaternary carbon structure and a side chain connected with the quaternary carbon structure through an ester bond. The side chain comprises a thioether chain segment connected with an ester bond, an aromatic group connected with the thioether chain segment and an epoxy group connected with the thioether chain segment. The optical monomer provided by the embodiment of the invention takes a quaternary carbon structure as a core skeleton, and a side chain sequentially comprises an aromatic group, a thioether chain segment and a terminal epoxy group. A thioether structure with high polarizability and an aromatic group are introduced into the molecular design of the optical monomer, so that the refractive index and the optical transparency of a resin material are remarkably improved. And the rigidity of the epoxy aromatic ring is beneficial to improving the thermal stability and mechanical strength of the resin material. The epoxy group at the tail end can react with conventional epoxy resin to form a compact network structure, so that the stability of the resin material is improved, and the yellowing tendency is reduced.

The invention discloses a protective base film for a polaroid and a preparation method of the protective base film, and belongs to the technical field of optical display equipment protective films. The protective base film comprises an antistatic PET base material layer and a self-adhesive layer, the antistatic PET base material layer is prepared by blending optical-grade PET slices and antistatic master batches, the master batches are prepared by taking ionic liquid dihydric alcohol as a comonomer, and the base film is endowed with lasting and stable intrinsic antistatic performance; the self-adhesive layer is formed by melting and blending a polyurethane acrylate prepolymer, a modified montmorillonite filler, other matrix materials and auxiliaries according to a specific ratio and carrying out an online UV curing process. Through innovative material design and an integrated forming process, the prepared protective base film has excellent optical transparency, lasting antistatic property, appropriate bonding strength, clean stripping property and outstanding damp-heat aging resistance, the comprehensive performance is remarkably superior to that of a traditional gluing protective film, and the production process is more environment-friendly and efficient.

A self-healing polyurethane-based coating composition, a polyurethane-based coating film including the same, and methods of manufacturing the coating composition and the coating film, in which design of an oligomer containing a disulfide functional group is capable of achieving self-healing performance at room temperature and ensuring appropriate fluidity, whereby a coating film can be manufactured by spraying. The composition further includes a polyisocyanate hardener, and the oligomer is formed by polymerizing a carbonate-type diol, an alicyclic isocyanate, and an aromatic disulfide-type diol. This specific molecular design provides high self-healing efficiency, enhanced optical transparency, and excellent mechanical stability. The coating film achieves a self-healing efficiency of 80% or more, a transmission rate of 85% or higher, and a sagging rate of 5% or less. The manufacturing process controls the molar ratios of hydroxyl (—OH) to isocyanate (—NCO) groups, optimizing cross-linking and ensuring durability in the final coating.

The invention discloses a preparation method of a silicon dioxide-epoxy resin composite material, the acoustic impedance of the composite material is controlled by adjusting the volume fraction of the silicon dioxide-epoxy resin composite material, an ultrasonic transducer prepared by utilizing the composite material and a preparation process thereof, and an imaging system designed by utilizing the ultrasonic transducer. By designing the matching layer and the backing layer with specific acoustic impedance, seamless fusion of ultrasonic imaging and photoacoustic imaging is realized, the transducer has ultrahigh sensitivity, broadband characteristic and high optical transparency, shows bimodal imaging capability of high contrast and high resolution, and solves the problem that a traditional transparent ultrasonic transducer is insufficient in acoustic performance.

The invention relates to the field of silicone hydrogel materials, in particular to a contact lens silicone hydrogel material with good flexibility and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out cation ring opening polymerization under 350-370 nm UV light to form a prepolymer A containing unreacted epoxy groups and vinyl; and then mixing the prepolymer A with an amido-containing hydrophilic monomer, a free radical cross-linking agent and a photothermal initiator, and carrying out second-stage polymerization under 380-410 nm UV light to form a three-dimensional network structure with an ether bond flexible interface and C-C bond strength. The method breaks through the phase separation bottleneck of traditional single-stage polymerization, the phase separation size is reduced, and the optical transparency and stability are improved. Through chemical bridging of an epoxy group and an amide group, molecular-level bonding of a siloxane phase and a water phase is realized, and flexibility and wearing comfort are improved. By introducing the flexible chain segment regulator, the flexibility of the molecular chain is enhanced, the modulus is reduced, and meanwhile, high oxygen permeability and low protein adsorbability are kept.

The invention relates to the technical field of functional materials for laminated glass, in particular to a high-damping intermediate film and a preparation method thereof. The high-damping intermediate film comprises the following components in parts by weight: 100 parts of PVB (Polyvinyl Butyral) resin, 5-25 parts of TPU (Thermoplastic Polyurethane) resin, 30-40 parts of plasticizer, 5-15 parts of compatilizer, 0.1-1 part of antioxidant and 0.1-1 part of ultraviolet light absorber. The compatilizer is a polymer containing an epoxy functional group. According to the invention, the TPU resin with high damping property is introduced, and the compatilizer is utilized to enable the TPU resin to form a nanoscale dispersed phase in a PVB matrix, so that an efficient damping dissipation structure is constructed, and the damping dissipation capability of the material to sound energy (especially low and medium frequency noise) is remarkably enhanced. Therefore, the prepared intermediate film has a higher loss factor, the weighted sound reduction index of the intermediate film reaches 38dB or above, the traffic noise spectrum correction is-3dB or below, and meanwhile, excellent optical transparency and mechanical properties are kept.

The invention discloses protective glass, an isolating agent, application of the isolating agent and display equipment, the protective glass comprises a glass body and an isolating membrane layer arranged on at least one surface of the glass body, the isolating membrane layer can inhibit alkali precipitation reaction of soda-lime glass, especially alkali precipitation reaction on the back surface of the glass, and the isolating membrane layer can inhibit alkali precipitation reaction of the soda-lime glass, especially alkali precipitation reaction on the back surface of the glass. And the surface energy difference of the back surface of the glass can be eliminated, so that the whole surface energy becomes more uniform. The protective glass is good in optical transparency, clear in imaging, high in glossiness, low in Ra roughness and high in Rsm roughness, the problem of poor watermarks of a whole machine can be solved, and the protective glass can be adopted for improvement as long as soda-lime glass is used in other industries.

The invention provides a sodium ion specific fluorescence labeled transparent soil sample as well as a preparation method and application thereof, and belongs to the technical field of rock soil and geological engineering. The method comprises the following steps: firstly, sequentially carrying out hydrophilization treatment, solvent evaporation and dissolution on a sodion combined benzofuran isophthalate probe to obtain a probe mother solution; mixing the probe mother solution, a buffer solution, an inorganic sodium salt solution and a solvent to prepare a fluorescence labeling pore solution; and finally, mixing the sodium polyacrylate particles and the fluorescence labeled pore liquid, and performing vacuum saturation treatment to obtain the transparent soil sample. The transparent soil sample provided by the invention still keeps excellent optical transparency while having sodium ion specific response capability, so that a stable and reliable experimental medium is provided for in-situ, real-time and full-field observation of sodium ion migration.

The invention discloses a low-dielectric polyimide film based on a fluorine-containing triphenylmethane unit as well as a preparation method and application of the low-dielectric polyimide film, and the low-dielectric polyimide film is a novel polyimide material FPOPF-6FDA obtained by polymerizing a fluorine-containing triaryl methane diamine monomer and 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride. The fluorine-containing triarylmethane diamine monomer is preferably 4, 5-diphenyl-1, 3, 5-triazine. According to the invention, 4, 4 '-((4-fluoro-3-phenoxy phenyl) methylene)) bis (2-fluoroaniline) is used, specifically, 4, 4'-diaminotriphenylmethane is used as a functional core, a fluorine-containing group and a large-volume side chain group are introduced, and non-coplanar twisted conformation destroys close packing of molecular chains and increases the chain spacing, so that the effect of a charge transfer complex (CTC) is weakened, and the photoelectric conversion efficiency is improved. And the heat resistance and optical transparency of polyimide are maintained while the dielectric constant of the material is reduced.

The invention discloses polyarylamide with a triphenylamine structure modified by trifluoromethyl and carbazole and a preparation method of the polyarylamide, and belongs to the technical field of modified polyamide materials. The structural formula of the polyarylamide with the trifluoromethyl and carbazole modified triphenylamine structure is as follows: the trifluoromethyl and carbazole modified triphenylamine structure is introduced into a main chain of a polyarylamide molecule, so that the polyarylamide is endowed with good solubility, thermal properties, optical transparency, lower dielectric constant and the like, and has a wide application prospect.

The invention discloses an OCA (Optical Clear Adhesive) based on temperature-responsive visbreaking microspheres as well as a preparation method and application of the OCA. The OCA is prepared from the following raw materials in parts by mass: 100 to 105 parts of a main copolymer, 4 to 8 parts of the temperature-responsive visbreaking microspheres, 1 to 2 parts of boron nitride nanosheets, 0.8 to 1.2 parts of an antioxidant, 0.8 to 1.2 parts of a light stabilizer and 30 to 40 parts of a solvent, the main body copolymer is formed by graft copolymerization of urethane acrylate and an organic silicon modified composition; the organic silicon modified composition is composed of an organic silicon monomer and an organic silicon polymer; the temperature response type visbreaking microsphere takes a hollow microsphere protomer as a base sphere, the hollow microsphere is filled with silicone oil, and a shell is coated with fluorine-containing acrylate. The temperature-controllable visbreaking is realized through the temperature-responsive visbreaking microspheres, and meanwhile, the OCA prepared by the preparation method disclosed by the invention not only ensures optical transparency, but also realizes the synergistic performance of normal-temperature bonding, high-temperature visbreaking and folding resistance. The adhesive can be widely applied to the technical field of optical adhesives.

This invention discloses a high-gain vehicle-mounted optically transparent antenna with improved radiation pattern, operating in the 0.74-0.87 GHz range. The invention includes a substrate, an antenna body, and a system ground plane. The substrate comprises a PET film layer, an OCA adhesive layer, and a PC dielectric substrate. The antenna body consists of two trapezoidal radiating patches, a reverse cancellation strip, a feed line, and a system ground plane located on the same layer as the antenna. The two trapezoidal radiating patches are connected by the reverse cancellation strip, which links their longer base edges. Its transparency is primarily achieved through the use of a transparent substrate material and a metal mesh structure composed of thin and fine metal wires. The cascaded trapezoidal radiating patches and the connected reverse radiation strip achieve performance improvements such as high gain, wide bandwidth, and improved horizontal radiation pattern nulls. This invention can achieve optical transparency of over 70%, radiation efficiency of over 65%, and radiation pattern null improvement of over 3 dB in the operating frequency band.

Multilayer surface protection films and methods for making and using such films are provided. The surface protection films have first and second thermoplastic polyurethane (TPU) layers and an intermediate ethylene vinyl acetate (EVA) layer disposed between the first and second TPU layers. The use of the first and second TPU layers as outer layers contributes to the optical clarity of the film. These TPU layers may have different thicknesses. The use of EVA as a component of the film layers provides a film with lower cost compared to traditional single-layer TPU films. When used as a surface coating for a wide range of applications, such as automobiles, wind turbine blades, home appliances, electronic displays, and mobile devices, the EVA component properties and the total EVA ratio of the film can be used to improve the physical properties of the multilayer structure while maintaining comparable or superior performance to these films.

The present application relates to a kind of polyimide film and its preparation method and application, mainly solve the optical transparency of polyimide film in prior art and the dimensional stability difficult to be compatible with the problem of difficulty.This colorless transparent polyimide film provided by the present application has excellent comprehensive performance, simple preparation method, wide raw material source, and has excellent application prospect in the field of flexible display, advanced microelectronics and the like.

This application belongs to the field of microwave absorber technology, and particularly relates to a frequency-selective microwave absorber. The frequency-selective absorber includes a support layer having a first surface and a second surface disposed opposite to each other; a first dielectric layer bonded to the first surface; a second dielectric layer bonded to the second surface; a loss layer bonded to the side of the first dielectric layer away from the first surface to absorb electromagnetic waves of a preset frequency band; and a transmission layer bonded to the side of the second dielectric layer away from the second surface, allowing electromagnetic waves of the preset frequency band to pass through. The support layer, the first dielectric layer, the second dielectric layer, the loss layer, and the transmission layer are all transparent structures. This application can solve the technical problem in the prior art where frequency-selective absorbers lack optical transparency.

The invention belongs to the technical field of optical adhesives, and discloses an upper and lower glass substrate bonding sealant and application thereof, the sealant comprises the following raw materials: urethane acrylate, isobornyl acrylate, a photoinitiator, a cross-linking agent, a multifunctional stabilizer, modified nano silicon dioxide and a polymerization inhibitor; the multifunctional stabilizer is a triazine derivative containing a hindered phenol antioxidant structure, a benzotriazole ultraviolet light absorber structure and a long-chain alkyl structure; the modified nano silicon dioxide is core-shell nanoparticles formed by in-situ growth of nano cerium dioxide on the surface of mesoporous silicon dioxide loaded with a hindered amine light stabilizer; the liquid optical sealant is prepared from polyurethane acrylate and isobornyl acrylate, and the multifunctional stabilizer and the modified nano silicon dioxide are compounded, so that the liquid optical sealant has optical transparency, bonding sealing performance, weather-resistant stability and mechanical enhancement, and is adaptive to the fitting scene of upper and lower glass substrates.

The application relates to the technical field of laser packages, in particular to an in-situ optical shaping VCSEL array integration method and an optical interconnection module, which comprises the following steps: S1, a quartz substrate is used, a femtosecond laser pulse is focused and scanned in the quartz substrate, and a three-dimensional profile of a micro hole is defined in advance; S2, a VCSEL chip is precisely placed into the micro hole in an array arrangement with the VCSEL chip facing upwards, and epoxy resin is cured by heating; S3, a metal layer is sputtered on the quartz substrate, and an electrical interconnection track is formed through photolithography; S4, a two-photon polymerization direct writing system is used to initiate two-photon polymerization of photoresist, solidification is realized, and the production of a polymer lens is completed. The application selects fused quartz glass as the only passive integrated substrate; the substrate has four characteristics of optical transparency, electrical insulation, thermal stability and three-dimensional micro machining at the same time, replaces the multilayer composite substrate in a traditional scheme at one time, and realizes the original integration design basis of an optical path, an electrical circuit and a thermal path.

The present invention relates to a method for manufacturing a vacuum insulation panel using a synthetic resin having optical transparency, a vacuum insulation panel manufactured thereby, an add-on window using same, a method for manufacturing same, and an insulation shutter installation method. According to the present invention, the method for manufacturing a vacuum insulation panel using a synthetic resin having optical transparency comprises: an upper and lower plate stacking step of stacking an upper plate and a lower plate such that a plurality of spacers are provided between the upper plate and the lower plate to provide a space therebetween, the upper plate and the lower plate being made of a transparent synthetic resin; an edge bonding step of bonding the edges of the upper plate and the lower plate; and a vacuum layer forming step of forming a vacuum layer by discharging air through an exhaust hole formed in the upper plate or the lower plate and closing the exhaust hole. Accordingly, the upper plate and the lower plate made of a synthetic resin having high optical transparency, such as polycarbonate, have lower thermal conductivity than glass, thereby improving the insulation performance of the vacuum insulation panel, and, when the vacuum insulation panel is used as a door of a commercial refrigerator, condensation due to a temperature difference is prevented on the outer surface, thereby providing a use environment in which items stored in the refrigerator can be checked without opening the door.

This invention discloses a colorless polyimide film with high fluorine content, high heat resistance, and low expansion, as well as its preparation method and applications. Specifically, a series of high-fluorine terphenyl dianhydride (structure I) and high-fluorine terphenyl diamine (structure II) are copolymerized (or homopolymerized), cast, and heat-treated to prepare CPI optical film materials with excellent properties. This type of CPI film exhibits excellent optical transparency, high glass transition temperature, high thermal decomposition temperature, low coefficient of thermal expansion, high mechanical properties, and low dielectric loss, making it highly suitable for applications in flexible displays, wearable devices, flexible batteries, and 5G high-frequency communications.

The invention provides a coating with optical permeability and a preparation method thereof. The coating with optical permeability is prepared from the following raw materials in parts by mass: 25 parts of water-based acrylate copolymer emulsion, 25 to 35 parts of water, 0.8 to 1.5 parts of transparent functional particles, 16 to 20 parts of functional modified inorganic filler, 5.5 to 7.5 parts of boric acid ester-silanol-hydroxyl three-function cross-linked gel precursor solution, 0.2 to 0.5 part of thickening agent, 0.2 to 0.4 part of defoaming agent, 0.5 to 1 part of dispersing agent and 0.1 to 0.3 part of preservative. 0.2 to 0.5 part of an organic amine alcohol compound; the transparent functional particles comprise at least one of glass sand and cross-linked polymethyl methacrylate microspheres; the functional modified inorganic filler comprises at least one of amino silane modified snowflake white quartz sand and amino silane modified calcined sand white marble. The coating with optical permeability is suitable for the field of indoor and outdoor decoration.

The invention discloses an organic glass scintillator material as well as a preparation method and application thereof. The material comprises a dynamic covalent cross-linked polymer network formed by reaction of an epoxy monomer containing a halogenated conjugated group, a polyfunctional carboxylic acid curing agent or a polyfunctional anhydride curing agent and a transesterification catalyst. According to the invention, through molecular structure design, the cross-linked network unit has the characteristic of intrinsic radiation luminescence, a luminescent object does not need to be physically doped, and the bottlenecks of easy precipitation, easy phase separation, low optical transparency and the like of the traditional doped scintillator are fundamentally solved. The obtained material has efficient radiation luminescence and high transparency, and the imaging spatial resolution is remarkably improved. Meanwhile, the topological rearrangement characteristic of the dynamic ester bond is utilized, the defect that the thermosetting scintillator cannot be recycled is overcome, and self-repairing, morphology customization and cyclic remodeling of the device are achieved. The method is simple in preparation process and has important significance in the fields of X-ray imaging, nondestructive testing and the like.

The invention relates to the technical field of film packaging, in particular to an anti-yellowing low-moisture-absorption high-dimensional-stability BOPA film and a preparation method thereof. The film is composed of a first surface layer, a core layer and a second surface layer, the surface layers contain anti-yellowing PA particles, anti-sticking master batches and other auxiliaries, and the core layer contains anti-yellowing PA particles and other auxiliaries; wherein the anti-yellowing PA particles are prepared by melt extrusion of low-moisture-absorption PA particles, a compound stabilizer and an end-capping reagent, and the low-moisture-absorption PA particles are prepared by intercalation solid-phase polymerization of PA6, special nylon and flaky nanoparticles; the compound stabilizer is compounded by a heat stabilizer and a light stabilizer; and the end-capping reagent can seal polyamide active groups. The film is prepared through raw material drying, melt extrusion, synchronous two-way stretching, heat setting and corona treatment, keeps excellent mechanical strength and optical transparency, also has low moisture absorption, high dimensional stability and yellowing resistance, and can be widely applied to the field of flexible packaging of food, daily necessities, electronic appliances and the like.

This invention discloses a photolithographically patternable lithium-ion electrolyte, its preparation method, and its applications. The electrolyte is a photolithographically curable lithium-ion electrolyte composition, comprising, by mass percentage, LiTFSI, polyethylene glycol methyl ether methacrylate, bisphenol A ethyl oxide dimethacrylate, fluoroethylene carbonate, succinic acid, 2-hydroxy-2-methyl-1-phenyl-1-propanone (HMPP), 3-(isobutyryloxy)propyltrimethoxysilane, and 2-methyl-2-acrylate-2-hydroxyethyl. This invention also discloses a stepwise preparation method for this composition and its applications in micro-energy storage and ion-electronic devices such as micro solid-state batteries, ion-controlled transistors, and neuromorphic devices. This electrolyte can be patterned at the micro-nano scale using standard photolithography processes, exhibiting excellent lithium-ion conductivity, electrochemical stability, mechanical flexibility, and optical transparency. It also shows good interface compatibility with gold electrodes / silicon wafers, requiring no additional etching or transfer processes. This solves the technical problems of existing solid-state electrolytes being difficult to fabricate at the micro-nano scale and incompatible with microelectronic processes, and has broad application prospects in the fields of micro-nano fabrication and micro-devices.

The present application relates to a kind of polyimide film and its preparation method, the preparation method is dissolved in DMAC by NBDA and / or M-Tol, N2 is passed, stirring is completely dissolved, and mixed solution is obtained;BPADA or ODPA is added to mixed solution, the passage of N2 is maintained, after a period of time, PAA glue liquid is obtained;PAA glue liquid is dropped on tool plate, is coated uniformly on the tool plate according to the thickness required, is placed into oven, and heat imidization is carried out, then tool plate is taken out, and naturally cooled to room temperature, then tool plate is placed into warm water, until the film coated on tool plate is detached from the tool plate, then the film is placed in oven and dried, and after cooling, polyimide film is obtained.The preparation method of the polyimide film of the present application is simple, environmentally friendly, and the polyimide film of the present application has good optical transparency and thermal performance.

Flexible display devices, such as flexible cover lens films, are discussed and provided herein. The flexible cover plate lens film has good strength, elasticity, optical transparency, wear resistance and thermal stability. The cover lens film includes: a hard coating layer having a thickness of from about 5 m to 40 m; an impact absorbing layer having a thickness of from about 20 m to 110 m; and a substrate layer having a thickness of from about 10 m to 175 m and disposed between the hard coating layer and the impact absorbing layer. By combining the hard coating and the impact resistant layer, the cover lens film is both flexible and robust, while having a hardness of from 6H to 9H.

The disclosed apparatus may include an antenna radiating structure that includes an active transparent mesh portion as well as a non-transparent antenna radiator portion. By combining transparent metal mesh and non-transparent metallic film into the antenna radiating structure, the disclosed apparatus results in improved radiation efficiency. Moreover, when overlaid on a transparent lens (such as with a pair of augmented reality glasses), the antenna radiating structure leaves the optical transparency of the lens largely unaffected due to the placement of the non-transparent metallic film. Various other implementations are also disclosed.

The invention discloses a closed-loop recovery method of a cellulose nanocrystal composite film, which comprises the following steps of: mixing cellulose nanocrystals and sodium lipoate in an aqueous solution, and inhibiting bunchy aggregation of the cellulose nanocrystals in a film forming process through electrostatic repulsion and steric hindrance effect of the sodium lipoate to form a uniform single horizontal stacked structure; and drying to obtain the composite film with adjustable optical transparency and mechanical properties. Immersing the composite film into water, and carrying out dynamic covalent ring-opening depolymerization and complete dissolution on the sodium lipoate component; and carrying out ultrasonic treatment on the residual cellulose nanocrystal skeleton, centrifuging, and taking supernate to obtain redispersed single nanocrystals. According to the method, performance regulation and control and full-closed-loop recovery of the composite film are achieved through a water-phase processing strategy, the process is simple and convenient, energy consumption is low, and a feasible path is provided for green manufacturing and cyclic utilization of the nanocellulose material.

The utility model relates to the technical field of electronic equipment accessories, in particular to a peep-proof film and electronic equipment. The peep-proof film comprises an adhesive layer, a base material layer, a peep-proof layer and an adhesive layer which are sequentially arranged in a stacked mode, the face, facing the base material layer, of the adhesive layer is plated with a color layer, a first OCA adhesive layer is further arranged between the adhesive layer and the base material layer, and the color layer is covered with the first OCA adhesive layer. The adhesion performance of the first OCA adhesive layer can enhance the stability of the color layer attached to the adhesive layer, the optical transparency and durability of the first OCA adhesive layer are beneficial to protecting the integrity of the color layer, the damage of the external environment to the color layer is prevented, and the color retention time of the color layer is prolonged. In addition, the first O CA adhesive layer further has certain scratch resistance and impact resistance, when the peep-proof film is subjected to external force such as cutting, collision or friction in the production process, the first O CA adhesive layer can absorb the external impact force, and the risks of stripping, abrasion or color falling of the color layer are reduced.

The invention belongs to the technical field of spraying processes, and particularly relates to a process method for spraying a protective coating on the surface of an optical transparent part, which reduces the initial construction viscosity and reduces the probability of flow mark generation. According to the defect that a protective coating is prone to generating flow marks and defects in a curvature transition area, an overall curtain coating construction process is creatively adopted for an optimized low-viscosity coating, a process thought of'flood irrigation 'is adopted for curvature positions where defects are prone to being generated, the defects generated in the construction process are scoured by utilizing the gravity flowing characteristic of the coating, and therefore the defects generated in the construction process are washed away. A uniform and continuous liquid film is formed on the surface of the optical transparent part; the process step of secondary curtain coating is introduced, the secondary curtain coating process at the interval of 6 hours is determined by further exploring the window period of the coating, and through comprehensive verification, the optimized process greatly improves the optical performance of the protective coating, and key performance indexes such as optical distortion and angular deviation all meet the use requirements. And meanwhile, the wear resistance of the surface of the optical transparent part is very excellent.

The invention discloses an optically transparent vehicle-mounted planar traveling wave end-on-fire antenna, which structurally comprises a feed waveguide, a glass-based medium mirror image waveguide and a transparent wedge-shaped transition layer, wherein the feed waveguide is provided with an electromagnetic wave incident port; the glass-based medium mirror image waveguide is plated with an indium tin oxide (ITO) conductive layer; and the transparent wedge-shaped transition layer is arranged between the feed waveguide and the glass-based medium mirror image waveguide. According to the design, on the premise of keeping high optical transparency, the total attenuation constant caused by traveling wave leakage loss and ITO ohmic loss is reduced by adjusting the thickness of the glass substrate, so that the aperture surface is effectively expanded, and the maximum end-on-fire gain is obtained. Due to the characteristics of light transparency and low profile, the aperture of the antenna can be integrated on the automobile sunroof, and the feed structure of the antenna can be integrated on the sunroof frame. The circulator is connected behind the antenna port to realize isolation of receiving and transmitting channels, during working, electromagnetic waves are fed into the antenna from the excitation port, and then echo signals are reflected and transmitted to a rear signal processor through the circulator. The system detects front obstacles by analyzing echo signals, and then initiative braking early warning is triggered to reduce the rear-end collision risk.