519results about How to "Improve transmittance" patented technology

The invention discloses light gray low-emissivity coated glass for near-zero energy consumption buildings and a preparation method thereof, the light gray low-emissivity coated glass comprises a glass substrate and a composite metal film layer laminated on the glass substrate, and is coated glass with three metal silver film layers. According to the invention, one of the multiple composite metal film layers on the common colorless transparent float glass substrate reflects and interferes with light, so that the coated glass is light gray in the sun and has good decoration and energy-saving effects; the hollow glass is high in visible light transmittance, low in outdoor visible light reflectivity, low in solar energy transmittance and high in solar energy reflectivity, and can be made into hollow glass to achieve better energy-saving effects such as light control, heat insulation and the like, so that a building is closer to the nature and is fused with the nature.

The invention discloses a preparation method of low-radiation coated toughened glass, which comprises the following steps: sintering a target material, carrying out moisture removal and degassing pretreatment on glass, carrying out coating treatment and toughening treatment, and laminating a composite metal film layer on a toughened glass substrate to prepare the toughened coated glass with three metal silver film layers. According to the method disclosed by the invention, after a common glass substrate is plated with the composite metal film layers, toughening treatment is carried out, and after the toughening treatment, all the metal film layers reflect, interfere and refract light, so that the glass disclosed by the invention is light green (French green) in the sun, and the decoration and energy-saving effects are good; the visible light transmittance is high, the outdoor visible light reflectivity is low, the solar energy transmittance is low, and the solar energy reflectivity is high; the prepared hollow glass has better energy-saving effects such as light control, heat insulation and heat preservation, enables buildings to be closer to the nature, is used for near-zero energy consumption buildings, and enables the buildings to meet the requirements of the national standard General Standard for Building Energy conservation and Renewable Energy Utilization.

The embodiment of the invention discloses a microscope objective optical system, a microscope objective and a wafer detection microscope, and relates to the field of optics. The system is sequentially provided with a first lens group, a second lens group and a third lens group along the same optical axis from an image space to an object space; wherein the third lens group has positive focal power and is used for collecting light beams; the second lens group has negative focal power, the first lens group has positive focal power, the second lens group and the third lens group are used for correcting and compensating the optical system, and the second lens group comprises at least two lenses made of materials with different dispersion coefficients. The second lens group and the third lens group with correction and compensation functions are arranged, so that the optical system can meet the microscopic requirement of an ultra-wide working spectrum range, and the imaging quality is ensured.

The invention relates to the technical field of chips, in particular to a reversed-polarity red light emitting LED chip and a manufacturing method thereof. The reversed-polarity red light emitting LED chip comprises a graphite substrate, a graphene bonding layer, an Ag reflector, an AZO conductive thin film layer, an MgF dielectric film layer, a GaP window layer, a P-type semiconductor layer, a light emitting layer, an N-type epitaxial limiting layer, an N-type current expansion layer, a coarsening layer, a passivation layer, a GaAs contact layer and an N electrode from bottom to top. According to the LED chip and the manufacturing method thereof, reasonable design is carried out on the chip manufacturing process, a mirror surface layer, a bonding layer, back gold and other metals do not need to be evaporated for multiple times, the chip manufacturing process is shortened, the use of chip gold can be greatly reduced, and the obtained LED chip is high in brightness, good in reliability, long in service life and low in cost.

The invention relates to the technical field of photovoltaic packaging materials, and discloses a black high-reflection infrared integrated packaging material and a preparation method thereof, and the black high-reflection infrared integrated packaging material comprises a bonding packaging layer, a light management layer, a mechanical transition layer and an insulating supporting layer which are arranged from top to bottom; all the layers are subjected to integrated melting and co-extrusion to obtain the packaging material; the first melting point of the bonding packaging layer is 70-100 DEG C, the second melting point of the bonding packaging layer is 110-130 DEG C, and the content of the cross-linked gel after irradiation is 5-30%; the melting point of the light management layer is 70-130 DEG C, the light management layer comprises a perylene black surface layer and a white light reflecting layer which are sequentially arranged, the visible light absorptivity of the perylene black surface layer is larger than or equal to 90%, and the infrared light transmittance of the perylene black surface layer is larger than or equal to 50%; the melting point of the mechanical transition layer is 90-130 DEG C; and the melting point of the insulating support layer is 120-180 DEG C. According to the invention, the high transmittance of infrared light is maintained while the deep black appearance is realized, the secondary absorption of the infrared light can be realized, and the overall efficiency of the assembly is improved.

The invention discloses a terahertz modulator based on an aluminum and germanium-antimony-tellurium composite dumbbell hole array. The terahertz modulator comprises a substrate and the aluminum and germanium-antimony-tellurium composite dumbbell hole array formed on the surface of the substrate. The aluminum and germanium-antimony-tellurium composite dumbbell hole array is characterized in that a plurality of periodically arranged dumbbell holes are etched in an aluminum thin film, and a layer of germanium-antimony-tellurium thin film covers the aluminum dumbbell hole array; a structural unit of the aluminum dumbbell hole array is composed of two round holes with the same radius and a rectangular hole, the rectangular hole is connected with the two round holes, and the depth of the round holes, the depth of the rectangular hole and the thickness of the aluminum film are the same. The terahertz modulator can dynamically adjust the transmissivity of terahertz waves through germanium-antimony-tellurium phase change. According to the aluminum and germanium-antimony-tellurium composite dumbbell hole array disclosed by the invention, a modulator can be realized in a terahertz frequency band, and dynamic adjustment on the terahertz wave transmissivity is realized by utilizing the phase change characteristic of germanium-antimony-tellurium.

The invention discloses an anti-fouling etching AG glass coating material and a preparation method thereof, and relates to the technical field of anti-fouling coating materials. A coating material of the anti-fouling and anti-etching AG glass consists of composite modified silicon dioxide sol and a high-performance polyurethane coating raw material, the composite modified silicon dioxide sol is prepared from graphene oxide modified particles, dispersed silicon dioxide sol and a low-surface-energy solution, graphene oxide modified particles and a low-surface-energy solution are used for synergistically modifying dispersive silicon dioxide sol to obtain composite modified silicon dioxide sol, then under the action of a high-performance polyurethane coating raw material, the wear resistance and the hydrophobic antifouling property of the coating material are further enhanced, and meanwhile, the coating material also has good light transmittance and is suitable for being used in the field of coating materials. And the excellent treatment effect on AG glass spraying is achieved.

The invention discloses low-lithium high-strength transparent microcrystalline glass and a preparation method thereof. The low-lithium high-strength transparent microcrystalline glass is prepared from the following raw materials: 7wt%-15wt% of Li2O, 2wt%-12wt% of Al2O3, 60wt%-78wt% of SiO2, 1wt%-4wt% of ZrO2, 1wt%-5wt% of P2O5, 0-1wt% of Na2O and 0-3wt% of K2O. The preparation method comprises the following steps: mixing the raw materials, melting, annealing and crystallizing to obtain the low-lithium high-strength transparent glass ceramic which is a glass ceramic product with high mechanical strength, high transmittance, low haze, low dielectric loss and high thermal conductivity, can meet the requirements of mobile phone cover plate glass on the glass ceramic, reduces the cost, has a very good market value, and is suitable for popularization and application. The high-strength transparent microcrystalline glass can be applied to a front cover and / or rear cover protection component in a cover plate material for a touch display product.

The invention belongs to the technical field of solar cells, and particularly relates to a composite layer for a laminated solar cell and application of the composite layer. The invention aims to provide a novel intermediate composite layer material based on metal nitrogen oxide, the novel intermediate composite layer material specifically comprises titanium oxynitride, tantalum oxynitride and molybdenum oxynitride, and the composite layer material has the advantages of proper energy level matching, good light transmission, small parasitic absorption, excellent carrier recombination performance, low preparation cost and good stability. The material is prepared by adopting magnetron sputtering and atomic layer deposition methods, the preparation process is simple, the deposition damage is small, the photoelectric property of the material can be regulated and controlled by adjusting deposition parameters, and then excellent carrier recombination performance is achieved. Compared with a common doped indium oxide composite layer and a doped silicon film tunnel junction, the metal nitrogen oxide intermediate composite layer has the advantages of simple preparation process, low cost, small optical parasitic absorption and the like; and the lateral conductivity is relatively low, so that the method is suitable for preparing a large-area perovskite / crystalline silicon laminated cell.

The invention relates to the technical field of eutectic equipment, in particular to an elastic suction nozzle assembly, eutectic equipment and an eutectic method. The elastic suction nozzle assembly comprises a base, at least two suction nozzles arranged on the base and elastic assemblies arranged corresponding to the suction nozzles. The suction nozzle comprises a connecting section and a working section which are connected; two ends of the elastic component are connected with the base and the connecting section of the corresponding suction nozzle; the base is provided with a through avoiding channel, the working section is movably located in the avoiding channel, and the working section penetrates through the avoiding channel from one side of the base and is exposed out of the other side of the base. The working section is provided with a vacuum air path and a perspective window arranged corresponding to the vacuum air path; external light can pass through the perspective window and the vacuum air path in sequence and then penetrate out of the adsorption opening of the suction nozzle. According to the scheme, multiple chips can be mounted and elastically abutted at the same time, the positions of the chips are allowed to be obtained in the mounting process, so that the chips are adjusted in real time, and efficient mounting and real-time calibration capacity of the multiple chips are achieved.

The embodiment of the invention provides a display module, a manufacturing method thereof and a display device, relates to the technical field of display, and is used for effectively preventing glue from flowing to a display area. The display module comprises a display panel, the display panel comprises a display area and a first non-display area located on the periphery of the display area and further comprises a substrate and a first film layer located on one side of the substrate, the first film layer comprises an auxiliary sub-part, the auxiliary sub-part is located in the first non-display area, and the auxiliary sub-part comprises a groove or a protrusion.

The invention relates to a terahertz transparent electrode based on a nickel tellurium compound and a preparation method and application thereof, and belongs to the technical field of terahertz electrodes. In order to solve the problem that an existing terahertz transparent electrode cannot have high transmittance and good conductivity in the terahertz wave propagation direction at the same time, the invention provides a terahertz transparent electrode based on a nickel-tellurium compound, which comprises a substrate and a nickel-tellurium compound film. The nickel-tellurium compound films with different nickel-tellurium ratios are prepared by setting the target materials with different nickel-tellurium areas, so that the conductivity, transmittance and thickness of the terahertz transparent electrode are adjusted, and the relatively high transmittance and high conductivity of the terahertz wave band of the terahertz transparent electrode are balanced; the transmittance of the obtained terahertz transparent electrode based on the nickel tellurium compound in the terahertz wave band is higher than 80%, the conductivity is larger than 1000 S / cm, and the qualified standard of a transparent conductive film is met. The preparation method is low in requirement and suitable for practical batch production of the terahertz transparent electrode.

The invention discloses a photovoltaic and photo-thermal comprehensive utilization system based on tower type photo-thermal power station optimization, and belongs to the technical field of power generation. According to the invention, by optimizing the structure of the concentrating tower, the original traditional scheme of directly concentrating light to a heat receiver from a reflecting mirror field is optimized into a two-stage reflection design, that is, the reflecting mirror field is used as first-stage reflection, the position of a frequency division film is used as second-stage reflection, and a photovoltaic cell and the frequency division film are placed at the second-stage reflection position. A frequency division film is plated on the surface of a photovoltaic cell panel, so that visible light high-grade energy wave band transmission and absorption are improved, reflection of visible light and low-grade infrared light to a certain degree is maintained, normal operation of a condensation type photo-thermal system is guaranteed, spatial separation of high-grade visible light photon energy and low-grade near-infrared light photon energy is completed, and the energy efficiency is improved. Therefore, frequency division utilization of solar energy is achieved, solar energy utilization is achieved in a mode of combining a photovoltaic system and a photo-thermal system, and the power generation efficiency is improved. The system is suitable for solar power generation combining a photovoltaic system and a photo-thermal system.

The invention discloses a two-piece long-wave infrared lens which comprises a first lens and a second lens which are sequentially arranged from an object plane to an image plane, the first lens and the second lens are both meniscus lenses which protrude towards the object side and have positive focal power, at least one of the object side face and the image side face of the first lens is a binary plane, and at least one of the object side face and the image side face of the second lens is a convex plane. The object side surface and the image side surface of the second lens are aspheric surfaces; and the proportional relation among the focal length, the maximum image height and the field angle is reasonably set. According to the lens, good imaging is ensured, the size and weight are reduced, the cost is reduced, the response rate is improved, and a large clear photographing range can be ensured when an object is remotely recognized.

The invention discloses a preparation method and application of large-size high-strength electronic glass, and relates to the technical field of photoelectric display glass, matrix glass prepared through the method has high transmittance, the surface of the matrix glass is smooth and transparent through grinding and polishing, further expansion of cracks can be blocked after heat treatment, the strength of the glass is further improved, and the service life of the glass is prolonged. The display panel is especially suitable for photoelectric display equipment.

The invention discloses an ultraviolet curing adhesive and a preparation method thereof. The ultraviolet curing adhesive comprises the following components in parts by weight: 30-40 parts of aliphatic polyurethane acrylate, 50-60 parts of a reactive diluent, 3-5 parts of a photoinitiator, 0.3-1 part of an auxiliary initiator, 1-2 parts of a coupling agent and 3-5 parts of a thixotropic agent, wherein the auxiliary initiator comprises piperyl alcohol and derivatives thereof. According to the invention, the polybutadiene polyurethane acrylate is used as main body resin, so that the adhesive has better flexibility, lower water vapor transmission rate, better insulativity and better bending resistance. Common amine co-initiators such as EDB can be used for improving surface dryness, but yellowing is generated after curing, so that the curing depth is reduced, however, the amine-free piperonol and derivatives thereof are used for replacing the amine co-initiators, yellowing is avoided after curing while the surface dryness is improved, and the original curing depth is well maintained; and relatively good surface drying and curing depth can be achieved at the same time.

The invention provides a transcranial light adjusting method and system based on a laser light source and transmitting energy through an optical fiber bundle, relates to the technical field of physiotherapy, and mainly comprises a power supply, a controller, a laser, an optical fiber coupler, the optical fiber bundle, a lens group and the like. The optical fiber coupler couples laser output by the laser into the incident end of the optical fiber bundle; the emergent end of the optical fiber bundle is set as one or more sub optical fiber bundles, and the tail end of each sub optical fiber bundle is selectively butted with one lens group; when the emergent end of the optical fiber bundle is provided with a plurality of sub optical fiber bundles, the plurality of sub optical fiber bundles are respectively and correspondingly arranged at the back of the prefrontal lobe, the belly of the prefrontal lobe, the temporal lobe, the apical lobe and other physiotherapy positions which are effective for light; and when the tail ends of the plurality of sub-optical fiber bundles are not butted with the lens group, the emergent end of each sub-optical fiber bundle is set as an optical fiber array, and the optical fiber array is embedded into the light supply effective head position and is in contact with the scalp, so that the absorption rate and the reflectivity of the hair to near-infrared light are reduced.

The invention relates to a preparation process and method for preparing core-shell nanoparticles and a polymer (PVP) film on a substrate of a common glass slide, wherein the core-shell nanoparticles are coated with tungsten-doped vanadium dioxide nanoparticles on the surface of silicon dioxide, and the process sequentially comprises the following steps of: pretreating a silicon dioxide and tungsten-doped vanadium dioxide core-shell structure and preparing a PVP mixed solution; the method comprises the basic operation procedures of ethanol dispersion of the core-shell structure, PVP dispersion, setting of stirring parameters, spin-coating parameters, drying parameters and the like. The invention also relates to an application of the core-shell nanoparticles and a polymer (PVP) film which are prepared on a substrate of a common glass slide and are coated with tungsten-doped vanadium dioxide nanoparticles on the surface of silicon dioxide in the fields of intelligent windows, infrared stealth, energy-saving glass and radiation refrigeration in the aspects of adjustable transmittance and adjustable radiation capability. The problems that a traditional vanadium dioxide nanoparticle film is low in visible light transmittance, poor in near-infrared modulation capacity, reverse in infrared radiance and the like are solved.

The invention relates to a separator and an electrochemical device comprising the same. According to one aspect of the present invention, there is provided a separator comprising: a porous substrate; the present invention relates to a porous film comprising a porous substrate, and an inorganic particle layer on one or both surfaces of the porous substrate, and comprising inorganic particles and an inorganic binder, in which the inorganic particle layer comprises an organic compound in an amount less than the amount of the inorganic binder, and the inorganic binder comprises a metal silicate.

The invention discloses a modified polyurethane polymer optical material as well as a preparation method and application thereof. The modified polyurethane composition optical material is composed of multi-mercapto mercaptan, isocyanate, a sulfur-containing epoxy compound monomer a and an acrylate quaternary crosslinking curing system, the modified polyurethane composition optical material prepared according to the method has the advantages of high impact resistance and high hardness while maintaining high refractive index optical performance, the visible light transmittance is larger than or equal to 89%, the refractive index is larger than or equal to 1.62, the surface hardness is larger than or equal to 3H, the material is suitable for manufacturing optical components with high requirements for optical and mechanical properties, such as prisms, lenses and protective screens, and a better solution is provided for application of high-end optical components. # imgabs0 #

The invention provides a miniature gas detection echo wall mode coupled cavity sensor based on an electromagnetism-like induced transparency effect. The device comprises a coupling cavity and a waveguide, the coupling cavity is two echo wall mode double-ring cavities with different sizes, and the waveguide is used for waveguide transmission with the coupling cavity and microcavity coupling. The echo wall mode coupled cavity sensor has the advantages that the echo wall mode coupled cavity is high in integration level and quality factor and easy to induce an electromagnetically induced transparency effect, and the intensity and the stability of a transparency peak are ensured. The excited electromagnetism-like induced transparency effect can be used for detecting and identifying the types of micro gases.

The invention relates to a narrow linewidth laser linewidth detection system based on spectrum reconstruction. The narrow linewidth laser linewidth detection system comprises a beam expanding collimation unit, an N-step etalon frequency discrimination unit, a beam splitting focusing unit, N point detectors and a multi-channel acquisition and data processing unit. The beam expanding and collimating unit is used for carrying out light beam collimation on incident measured laser, the N-step etalon frequency discrimination unit comprises N F-P cavities which are spliced into a multi-step etalon with a circular clear aperture, and the F-P cavities are used for respectively gating different spectral ranges of the measured laser and outputting parallel light with different energies. The beam splitting and focusing unit focuses the parallel light output by the N F-P cavities to the light sensing surfaces of the N point detectors respectively, and electric signals are formed through photoelectric conversion. And the multi-channel acquisition and data processing unit obtains a power measured value IM of each point detector, and calculates a power theoretical calculation value IjM of the N point detectors at the same time, thereby obtaining a line width value sigma of the measured single-frequency narrow-line-width laser. According to the invention, the problem that the 3dB bandwidth is difficult to directly read due to insufficient distinguishing capability of the existing frequency discriminator is solved.

The invention discloses a high-transmittance peep-proof device and a peep-proof display device.The peep-proof device comprises an upper substrate at the light emitting end, a lower substrate at the light incident end and a peep-proof structure arranged between the upper substrate and the lower substrate, the peep-proof structure comprises a plurality of light passing cylinders arranged side by side, and each light passing cylinder is a cylinder with one large end and one small end; the large ends of the light-passing columns are connected with the upper substrate, the small ends of the light-passing columns are connected with the lower substrate, shading gaps are formed between the adjacent light-passing columns, and the side walls of the light-passing columns are arranged in the mode that light entering the light-passing columns can only be reflected and cannot be transmitted on the side walls, so that all the light entering the light-passing columns is emitted from the upper substrate at a small angle. On the premise that the peep-proof requirement is met, the transmittance is greatly improved.

The invention relates to the field of hygienic products, and discloses a macroporous super-breathable, dry and comfortable hygienic product and a preparation process thereof, and the macroporous super-breathable, dry and comfortable hygienic product comprises a macroporous non-gel composite non-woven fabric, a nano platinum antibacterial layer, intelligent super absorbent resin and a softened surface layer. A macroporous structure is introduced into the surface of the non-woven fabric, so that the absorption speed of liquid and the air circulation are obviously improved; the nano platinum antibacterial layer endows the product with efficient antibacterial performance, effectively inhibits the growth of bacteria, and improves the hygienic guarantee of a user; the intelligent SAP automatically adjusts the water absorption capacity according to the environment humidity, rapidly expands under the high-humidity condition, improves the water absorption efficiency, locks the liquid and prevents the liquid from permeating back; the surface layer subjected to softening treatment further improves the comfort and the skin-friendly property of the product, and skin friction is reduced. The product is suitable for baby diapers, female sanitary napkins and adult incontinence nursing products, excellent air permeability, dry and comfortable performance and antibacterial performance are provided, and the comfortable experience of a user is remarkably improved.

The invention relates to the technical field of functional polymer composite materials, in particular to an intermediate film for laminated glass based on color generation of a photonic crystal structure and a preparation method of the intermediate film. The intermediate film comprises a thermoplastic resin matrix and a three-dimensional photonic crystal structure region dispersed in the thermoplastic resin matrix, wherein the three-dimensional photonic crystal structure region is formed by self-assembly of monodisperse microspheres, and the central wavelength of a photonic forbidden band of the region is located in a visible light range. According to the invention, a three-dimensional photonic crystal structure is constructed in the intermediate film, and structural color generation is generated by utilizing selective reflection of the photonic band gap effect on visible light with a specific wavelength. According to the laminated glass, the color is generated by interference of light instead of absorption of chemical pigments, so that the color can be continuously and regularly changed along with the change of an observation angle or an incident light angle, the dynamic and changing visual aesthetic feeling is given to the laminated glass, and the higher requirements of the fields of modern buildings, automobiles and the like on dynamic aesthetics and personalized appearance are met.

The invention provides a display module and an intelligent display system. The display module comprises a first display screen body part and a decorative film layer structure, the decorative film layer structure is located on the light emitting side of the first display screen body part, and the light transmittance of the decorative film layer structure ranges from 10% to 90%; wherein no polarized optical element is arranged between the first display screen body part and the decorative film layer structure. According to the embodiment of the invention, a polarized optical element is not needed, and correspondingly, the transmittance of the display module in the area is obviously improved, so that the power consumption of the display module in the area is reduced.

The invention relates to the technical field of optical thin films, and particularly discloses a preparation method of a super-hydrophobic optical thin film capable of being applied to different wavelengths, and the preparation method comprises the following steps: S1, carrying out surface cleaning, surface polishing and surface cleaning on a glass substrate, and then sputtering and depositing a silicon oxide film to obtain deposited glass; s2, performing metal copper fused deposition on the surface of the deposited glass, and then performing annealing treatment and nickel gun purging to obtain a semi-finished product; and finally, performing nano dry etching to obtain a finished product. The film has the advantages of hydrophobic effect, low reflectivity and high transmissivity.

The invention discloses a near-infrared shielding thermochromic intelligent window and a preparation method thereof, and belongs to the field of radiation refrigeration and intelligent windows. The problems that an existing thermochromic intelligent window is high in near infrared transmittance and low in middle and far infrared heat radiation regulation and control amplitude are solved. A near-infrared shielding thermochromic intelligent window is composed of a substrate, a hyperbolic metamaterial structure, a first oxide dielectric layer and a VO2 metasurface layer in sequence from bottom to top. The preparation method comprises the following steps: 1, cleaning the substrate; 2, preparing a hyperbolic metamaterial structure; 3, preparing a first oxide dielectric layer; and 4, preparing the VO2 metasurface layer. The thermochromic intelligent window for near-infrared shielding and the preparation method thereof are provided.

The invention relates to heat insulation type fireproof composite glass as well as a preparation method and application thereof. The glass comprises a counter-fire glass layer which comprises counter-fire glass; the heat insulation layer is arranged on the surface of the counter-fire glass layer; the heat insulation layer comprises a fiber aerogel core layer; a first potassium silicate gel layer and a second potassium silicate gel layer are arranged on the upper surface and the lower surface of the fiber aerogel core layer, and the counter-fire glass is connected with the heat insulation layer through the first potassium silicate gel layer; butyl rubber layers are arranged on the peripheries of the four vertical side faces of the fiber aerogel core layer. The back fire glass is arranged on the surface of the heat insulation layer, and the back fire glass layer comprises back fire glass; the back fire glass is connected with the heat insulation layer through a second potassium silicate gel layer; the surface of the butyl rubber layer is respectively connected with the counter-fire glass layer and the back-fire glass layer. The technical problem to be solved is how to prepare the glass which has good heat insulation and fireproof performance.

The invention belongs to the technical field of electrochromic films, and discloses a method for preparing a high-visible-light-transmittance tungsten oxide electrochromic film at low temperature based on a chemical bath method.The method comprises the steps that sodium tungstate is dissolved in water to obtain a sodium tungstate solution, the sodium tungstate solution and an oxalic acid solution are added into deionized water, stirring is conducted, and then the high-visible-light-transmittance tungsten oxide electrochromic film is obtained; adding hydrochloric acid to obtain a mixed solution, immersing FTO conductive glass into the mixed solution, and carrying out ultrasonic oscillation; and heating the reaction system at 60 DEG C for reaction, and washing, drying and annealing the FTO conductive glass on which the yellow film grows to obtain the tungsten oxide electrochromic layer. According to the method, the reaction conditions are mild, growth of the precursor film is completed through low temperature and raw material matching cooperation, and the tungsten oxide electrochromic film with high light transmittance and excellent electrochromic performance is finally prepared.