4040 results about "Optical film" patented technology

The invention relates to an optical film detection method, device and equipment based on image processing. The method comprises the following steps: collecting multiple frames of images of a multilayer optical film under different illumination conditions, and carrying out preprocessing and characteristic value calculation on the multiple frames of images to obtain a characteristic value response matrix; calculating an optimal weight coefficient of each frame of image according to the feature value response matrix, and performing multi-frame image feature fusion to obtain integrated feature representation; performing multi-scale defect feature extraction on the integrated feature representation to obtain a defect candidate region; spectral response characteristics are extracted based on the defect candidate area, matching degree calculation is carried out on the spectral response characteristics and a preset wavelength-film thickness mapping relation matrix, and a multilayer film defect distribution diagram is obtained; and performing autoregression prediction and processing control parameter optimization on the multilayer film defect distribution diagram to obtain a closed-loop control scheme. According to the invention, accurate identification and classification of different film layer defects are realized, and closed-loop control of defect detection results and manufacturing parameter optimization is further realized.

The invention provides a multi-layer optical film detection method, device and equipment and a storage medium, and the method comprises the steps: obtaining a polarization phase difference signal of transmission light and reflected light through multi-angle incidence irradiation of a multi-band programmable laser source, and recording the polarization ellipticity parameter change; then combining confocal microscopic interference and polarization analysis to determine a space coordinate and a stress distribution diagram of a stress abnormal region; continuously irradiating in a photo-thermal coupling environment through a broadband light source, and monitoring interference signals, polarization states and temperature changes to obtain dynamic evolution characteristics; and finally, performing a simulation test on the multi-layer optical film in a system environment with preset optical axis arrangement and light beam energy distribution, obtaining an in-situ polarization state and interference pattern data, and evaluating the optical performance of the film layer. According to the invention, potential defects can be positioned under high resolution, and the reliability and imaging quality of the film layer under complex application conditions can be accurately evaluated.

The invention relates to an intelligent detection method for appearance flaws of an OLED display optical film, and the method comprises the steps: carrying out the gray value difference according to an optical film gray image, obtaining a product region, carrying out the Gaussian filtering processing, obtaining an initial preprocessing gray image, and calculating an overall gray mean value; and performing linear scaling processing on the initial pre-processed grayscale image according to the overall grayscale mean value to obtain a first enhanced image, calculating a maximum grayscale value by using a specific structure element according to the first enhanced image, and taking the maximum grayscale value as a current pixel grayscale value to obtain a second enhanced image, and extracting all defect areas in the product area according to the first enhanced image and the second enhanced image, cutting the original gray level image according to the centroid coordinates of the defect areas, sending the cut defect cut image into a classification network model for category judgment, and outputting bubbles, foreign matters and concave-convex defects. According to the OLED display optical film defect detection device, the OLED display optical film defect detection efficiency and the detection result accuracy and reliability are greatly improved.

A coating composition comprises: a fluoro-aliphatic group-containing copolymer comprising a repeating unit A corresponding to a fluoro-aliphatic group-containing monomer, and a repeating unit B corresponding to at least one monomer, wherein each of the I / O values of said at least one monomer constituting the repeating unit B is 1.0 or less.

The invention discloses a self-adaptive microstructure optical film display screen and a dynamic optimization method thereof, and relates to the technical field of optical film display screens, and the method comprises the following steps: obtaining the data of a current frame image through a video stream, carrying out the feature extraction of the current frame image, and calculating the complexity of the current frame image based on the extracted image features; and comparing the current frame image with the previous frame image, obtaining dynamic change information between the current frame image and the previous frame image, performing feature extraction on the obtained dynamic change information, and identifying the dynamic change condition of the two adjacent frame images. According to the method, the current frame image data is obtained through the video stream, the detail density and other features are extracted, the complexity is calculated, and the dynamic change information, especially the texture change, is obtained. A machine learning algorithm is used to intelligently evaluate complex image changes, predict color saturation, dynamically adjust frequency, monitor and compare actual frequency and predicted frequency in real time, adjust system frequency, ensure color accuracy, reduce visual fatigue and improve user experience.

The embodiment of the invention discloses an optical film, a polaroid and a display device. The optical film comprises a first base layer; the second base layer is positioned on at least one side of the first base layer; the first base layer has a first solid phase; the second base layer contains at least two second solid phases; in the at least two second solid phases, two adjacent second solid phases are connected to form a plurality of interfaces, the plurality of interfaces are distributed in the second base layer, and the two second solid phases forming the interfaces are made of different materials. The multiple interfaces are distributed on the second base layer, so that directional reflection of light on the second base layer is reduced, and the anti-dazzling effect is achieved. Besides, the optical film can also provide good light transmittance and higher mechanical strength, so that the integration of an anti-dazzle function is realized on the protective base material of the polaroid, and the thickness and the manufacturing cost of the polaroid are effectively controlled.

The invention relates to the technical field of PET optical film coatings, in particular to a coating liquid for a PET optical film coating and a preparation method of the coating liquid. The coating liquid for the PET optical film coating is prepared from the following preparation raw materials in parts by mass: 20 to 25 parts of polyurethane acrylic resin, 10 to 15 parts of N-hydroxymethyl acrylamide, 1 to 2 parts of a coupling agent, 4 to 6 parts of a photoinitiator, 8 to 10 parts of modified nano titanium dioxide, 0.2 to 0.3 part of an ultraviolet light absorber and 40 to 47 parts of a reactive diluent. The coating liquid for the PET optical film coating prepared by the invention is excellent in adhesive force, weather resistance, scratch resistance, light transmittance and the like, and has a wide application prospect.

The invention discloses a composite optical film with a polarization function, a preparation method and application thereof. The composite optical film comprises a transparent substrate layer, and a buffer layer, an oriented calcite crystal layer and an anti-reflection layer which are laminated on one side of the transparent substrate layer. Wherein the oriented calcite crystal layer is obtained by coating a superparamagnetic modified calcite crystal composite material suspension on the surface of the buffer layer, inducing optical axis oriented arrangement through a magnetic field and performing UV curing; the buffer layer is obtained by co-extruding a cycloolefin polymer and a polyurethane acrylate mixture, and a thermal expansion coefficient transition system is formed; the anti-reflection layer is composed of nano-porous titanium dioxide with the refractive index changing from 1.8 to 2.3 in a gradient mode, and a refractive index gradient structure is formed. According to the composite optical film, the polarization efficiency and the light transmittance of the composite optical film are improved and the industrial stability is improved through the design of the polarization functional layer in which the calcite nanocrystals are directionally arranged under the induction of a magnetic field and in combination with the gradient refractive index scattering layer.

The invention discloses an optical film surface flaw detection method and system, a product and a medium. The method comprises the following steps: acquiring an edge detection image; performing connected domain segmentation in the edge detection image; calculating shape features of the connected domain; comparing the shape features of every two connected domains, and combining the connected domains with similar shape features into a combined connected domain; calculating gray value distribution characteristics and gradient change characteristics of the combined connected domains, and inputting the gray value distribution characteristics and the gradient change characteristics into the single defect characteristic model to obtain a combined single defect error value; the combined connected domains with the combined single flaw errors larger than a preset single flaw error threshold value are split into original similar connected domains to serve as flaw connected domains, and the flaw connected domains further comprise combined connected domains with the combined single flaw errors not larger than the preset single flaw error threshold value and non-similar connected domains; and constructing a defect type feature library, and carrying out defect type matching on all defect connected domains. By implementing the technical scheme provided by the invention, the accuracy of defect identification is improved.

This case relates to a self-healing optical film and its preparation method. The optical film is made by adding a nanoparticle suspension to PET masterbatch as the main material during its melt extrusion process, resulting in a cast sheet. After biaxial stretching, a self-healing coating liquid is coated online, followed by shaping and cooling. The nanoparticle suspension includes nano-titanium oxide, MAH-PET polymer, ATO nanoparticles, and titanate coupling agent. The self-healing coating liquid is produced by core-shell emulsion polymerization, forming a nano-silica hard core and an acrylate functional monomer polymer soft shell. This invention adds the nanoparticle suspension by in-situ feeding in the middle of the extruder, reducing steps, improving dispersion uniformity, and making the film surface smoother. Then, the self-healing coating liquid is applied online after longitudinal stretching and before transverse stretching, forming a film on the film surface, improving the hardness and scratch resistance of the film material, enabling rapid self-healing at room temperature, strong stability, and avoiding the occurrence of rainbow patterns.

The invention relates to a lighting device for vehicles comprising a flat light guide (1) with opposing flat sides (2, 2') and connecting narrow sides (3), with a plurality of microstructure elements (7) arranged on a flat side (2) of the flat light guide (1), with a number of light sources (4) arranged on one of the narrow sides (3) of the flat light guide (1), with a number of optical films (8, 9) adjoining a light-emitting flat side (2') of the flat light guide (1), which have an optical structure (10, 11) for light guidance on a flat side (16) emitting the light (6), wherein at least one optical film (8) has a capillary compensation structure (14) on a flat side (15) into which the light (6) enters.

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

Lighting device for a motor vehicle, comprising at least one light source, a planar light guide (2) with an entry surface (3) and at least one exit surface (4, 5), wherein the entry surface (3) is in particular designed as an end face of the light guide (2), at least one optical component (6, 7, 9, 10) designed as an optical disk or optical film, wherein the lighting device is configured such that the light generated by the at least one light source (1) enters the light guide (2) at least partially through the entry surface (3), that the light entering through the entry surface (3) exits at least partially from the at least one exit surface (4, 5), and that the light exiting from the at least one exit surface (4, 5) of the light guide (4, 5) passes at least partially through the at least one optical component (6, 7, 10) and / or is reflected by the at least one optical component (9).a housing (8) on or in which the planar light guide (2) and the at least one optical component (6, 7, 9, 10) are arranged, wherein the planar light guide (2) and / or the at least one optical component (6, 7, 9, 10) are made of silicone or wherein the planar light guide (2) and / or the at least one optical component (6, 7, 9, 10) comprise silicone.

Provided is a poly(vinyl alcohol)-based resin film which, when produced using a dissolution can, an extruder, a die, a metallic roll, a belt, etc., is less apt to cause corrosional deterioration of these, thereby bringing about excellent production efficiency and maintainability.　This poly(vinyl alcohol)-based resin film includes a poly(vinyl alcohol)-based resin (A), and has a C14 value in terms of pMC, as determined by ASTM D6866 (method B), of 9-50.

The embodiment of the invention provides an anti-dazzle low-reflection optical film and a preparation method and application thereof, and relates to the field of optical films. The anti-dazzle low-reflection optical film comprises a base material layer, an anti-dazzle layer and a low-reflection layer which are sequentially stacked from bottom to top, the low-reflection layer contains low-reflection particles, and the anti-dazzle layer contains organic anti-dazzle particles and inorganic particles. The mass concentration of the organic anti-dazzle particles close to the base material layer is larger than the mass concentration of the organic anti-dazzle particles close to the low-reflection layer, the mass concentration of the inorganic particles close to the base material layer is smaller than the mass concentration of the inorganic particles close to the low-reflection layer, and the refractive index of the low-reflection particles is larger than the refractive index of the inorganic particles and smaller than the refractive index of the organic anti-dazzle particles. Seen from the direction from the low-reflection layer to the base material layer, the refractive indexes of all the layers are gradually increased. According to the anti-dazzle low-reflection optical film and the preparation method and application thereof, the optical film achieves high haze and low reflectivity and can be applied to a strong light environment.

The invention relates to the technical field of optical elements, and discloses an optical film manufacturing device and method.The manufacturing device comprises a machine box, a material table is arranged in the machine box and used for containing a beaker containing a film coating solution, and a control box is further integrated on the machine box; the clamp is used for clamping a substrate to be coated; the linear telescopic electric cylinder is used for driving the clamp to move up and down; the swing frame is used for mounting the linear telescopic electric cylinder; the swinging driving mechanism is used for driving the swinging frame to perform pendulum swinging; a plurality of heating wires are arranged in the arc-shaped heating box; and the supporting frame is used for mounting the swinging driving mechanism. The manufacturing method adopts the manufacturing device to manufacture the optical film ear. The technical problems that in the prior art, in the multi-time multi-layer film coating process of an optical film manufacturing device, the film coating time is long, and the film coating uniformity is affected are solved, the film coating time is shortened in the optical film manufacturing process, drying and heating treatment can be rapidly conducted after the film is lifted, and the film coating uniformity is guaranteed.

The invention relates to the technical field of PET optical films, and particularly discloses a high-light-transmittance blue-light-resistant PET optical film and a preparation method thereof, and the high-light-transmittance blue-light-resistant PET optical film is prepared from the following raw materials by weight: 70-85% of a polyethylene glycol terephthalate resin matrix; 3%-8% of a benzotriazole anti-blue light agent; 5%-12% of a silicon dioxide nano anti-reflection agent; 2%-6% of nano zinc oxide or nano cerium oxide; 1.5% to 4% of a polycarbodiimide cross-linking agent; 0.5%-3% of an anti-blocking agent; 0.4%-1.5% of an antioxidant; 0.4%-1.0% of an ultraviolet light absorber; the balance is a processing aid; the preparation method comprises the following steps: S1, pretreating the raw materials; s2, a mixing procedure; and S3, extruding and coating. The PET optical film provided by the invention has high optical properties of high light transmittance, blue light resistance and low haze, and has the advantages of high light transmittance and blue light blocking rate of the optical film and improvement of the application range of the optical film.

Provided are a foldable optical film with excellent impact resistance and with capability to improve design quality, and an image display device including the same. An aspect of the present invention provides a foldable optical film 10 with a front surface 10A and a back surface 10B opposite to the front surface 10A, wherein optical film 10 includes a hard coat layer 12, a resin layer 13, and a decorative layer 14; the hard coat layer 12 is located closer to the front surface 10A than the resin layer 13 and the decorative layer 14 in the optical film 10; and the resin layer 13 has a film thickness of 10 μm or more, and the resin layer 13 has a Martens hardness of 1 MPa or more and 100 MPa or less.

The invention discloses an infrared film absorptivity prediction method and system based on machine learning, and relates to the technical field of optical film design and performance prediction.The infrared film absorptivity prediction method comprises the following steps that feature data of a to-be-measured film material and incident light are obtained, electromagnetic field distribution and local absorption power density are output, and according to power integration and boundary conditions, an infrared film absorptivity prediction result is obtained; obtaining initial absorptivity distribution; performing modal analysis on the initial absorptivity distribution, constructing a low-dimensional absorptivity response model, and outputting absorptivity response data after dimension reduction; constructing a physical constraint neural network by taking energy conservation and Fresnel boundary conditions as constraints; on the basis of a physical constraint neural network, absorptivity prediction is carried out on the infrared thin film under different conditions, thin film structure data are optimized through a multi-objective optimization algorithm, and an optimal structure parameter combination of the infrared thin film is obtained; according to the invention, through multi-physics field modeling and the physical constraint neural network, the problems of low infrared film absorptivity prediction precision and poor optimization efficiency are solved.

The invention relates to an optical film, a polaroid and a display device. The optical film comprises a base material layer and a depolarization function layer located on one side of the base material layer. The depolarization functional layer comprises at least one main body layer and birefringent particles dispersed in the at least one main body layer; wherein the included angle between the slow axis direction of the birefringent particles and the rolling direction of the base material layer is larger than or equal to 35 degrees and smaller than or equal to 55 degrees; when linearly polarized light enters the optical film, the linearly polarized light is converted into circular polarized light and / or elliptical polarized light by the depolarization function layer. The depolarization effect can be achieved through the method which is simpler in manufacturing process, lower in cost and higher in yield, and therefore the eye protection effect is achieved.

The invention provides an optical film, a polarizing plate, an image display device, and a method for selecting the optical film. An optical film having a low refractive index layer on a plastic film, the plastic film having a slow axis and a fast axis, the slow axis being an axis having a maximum in-plane refractive index, the fast axis being an axis orthogonal to the slow axis in a plane of the plastic film, and the low refractive index layer being located on a surface of the optical film. Radial polarized light enters from a surface of the optical film on the opposite side from the low refractive index layer under predetermined conditions, and a * value and b * value of the L * a * b * color system of transmitted light of the linearly polarized light are measured at 11 measurement points having different angles. On the basis of measurement at 11 measurement points, the sum of the second power of the a * difference between adjacent measurement points and the second power of the b * difference between adjacent measurement points is calculated at 10 adjacent points. In the optical film, sigma T, which represents the sum of the sums, is within a prescribed range.

The invention discloses a non-linear optical structure with perfect phase matching and high second harmonic generation efficiency. The non-linear optical structure comprises a fundamental frequency wave resonance structure, a non-linear optical layer, a second harmonic reflection structure and a substrate, the fundamental frequency wave resonance structure is used for generating electromagnetic field local enhancement at an incident fundamental frequency wavelength and realizing a phase matching condition by optimizing electric field phase distribution; the nonlinear optical layer is used for frequency conversion from fundamental frequency waves to second harmonics and regulating and controlling harmonic radiation capability and phase regulation and control; the second harmonic reflection structure is used for controlling coupling-out of second harmonics; the rotary nonlinear optical layer can adjust the phase characteristic of the radiated second harmonic so as to realize perfect phase matching of a harmonic field; according to the nonlinear optical structure with perfect phase matching and high-efficiency second harmonic generation efficiency, accurate control of phase matching conditions is realized through reasonable optical film stacking and phase matching technologies, and high-efficiency coupling-out and utilization of second harmonics are ensured.

The embodiment of the invention provides a backlight module, a preparation method thereof and a display module. The backlight module comprises a light-emitting substrate and a diffusion layer. The light-emitting substrate comprises a substrate body and a plurality of light-emitting elements arranged on the substrate body. The diffusion layer is located on the light-emitting side surface of the light-emitting substrate and comprises a first adhesive material layer and a plurality of diffusion particles distributed in the first adhesive material layer in a doped mode, and the refractive index of the diffusion particles is larger than that of the first adhesive material layer. According to the technical scheme, the diffusion particles can be doped and distributed in the first adhesive material layer to replace a diffusion film material, the number of optical film materials is reduced, and the cost of the backlight module is reduced.

The invention provides a high-water-resistance optical film and a polarizing plate comprising the same. The high-water-resistance optical film comprises a base film, a water-resistance layer and an adhesive layer, the structure of the high-water-resistance optical film comprises a water-resistance layer, a first adhesive layer, a base film and a second adhesive layer which are stacked in sequence, or the water-resistance layer, the base film and the second adhesive layer which are stacked in sequence, the surface of the waterproof layer is provided with nanometer protrusions and micropore structures which are uniformly and orderly arranged. The high-water-resistance optical film has excellent hydrophobicity, the water-resistance layer can efficiently absorb ultraviolet radiation, the problems of aging, yellowing, embrittlement and the like of the optical film caused by ultraviolet radiation are effectively prevented, the high-water-resistance optical film can be applied to a polarizing plate, and the service life of the polarizing plate is greatly prolonged.

The invention relates to a vacuum microcavity interferometer chip, a manufacturing method and a wide-range optical pressure sensor. Comprising a first substrate and a second substrate, the second substrate and the first substrate are bonded into a whole, a pressure sensitive film is manufactured on the first substrate, a first reflecting surface is deposited on the pressure sensitive film, and a second reflecting surface corresponding to the first reflecting surface is deposited on the second substrate. After the two substrates are bonded, the first reflecting surface and the second reflecting surface form an F-P optical interference cavity, at least one getter cavity is arranged on the first substrate and / or the second substrate, a getter film is arranged on the surface of the getter cavity, and the getter cavity and the F-P optical interference cavity are separated and connected through an air channel, so that the size of the air channel can be made to be very small, and the size of the getter cavity is smaller than that of the F-P optical interference cavity. A small amount of particles generated after the getter is activated are prevented from polluting an optical film to cause device failure; the whole sensor is of a sealed structure and is not provided with a structure externally connected with the chip, so that the overall airtightness of the chip is ensured, and the vacuum degree requirement of subsequent shell packaging is reduced.

The invention belongs to the technical field of optical film measurement, and particularly relates to a method and system for measuring the thickness of a quartz substrate optical film. The method comprises the following steps: acquiring a surface coordinate model of a quartz substrate, and dividing a film area into a parallel measurement area and a non-parallel measurement area; performing parallel measurement and non-parallel measurement on the two types of regions respectively to obtain first thickness data and second thickness data which jointly form original thickness data; determining measurement parameters corresponding to the original thickness data acquisition process, wherein each measurement parameter represents the offset of the corresponding measurement point; and correcting the original thickness data based on the measurement parameters to generate corrected thin film thickness data, and taking the corrected thin film thickness data as the thickness of the thin film area. According to the invention, dynamic error correction is carried out on the original thickness data, the accuracy and reliability of the thickness data of the thin film are improved, and meanwhile, comprehensive scanning of the irregular thin film is realized through a partition measurement strategy.

The utility model discloses an automatic deviation rectifying and conveying device for an optical film. The automatic deviation rectifying and conveying device comprises a bottom frame, a first guide rail assembly, a movable frame, a film rolling roller, a rotary driving mechanism, a fixed frame, a deviation rectifying sensor and a pushing air cylinder. The bottom of the movable frame is connected with the bottom frame through a first guide rail assembly, the pushing air cylinder is arranged on the bottom frame, and the movable end of the pushing air cylinder is connected with the movable frame. The deviation correcting sensor is connected with the side end of the fixed frame through the clamping arm, and the pushing air cylinder is used for pushing the movable frame to transversely move relative to the bottom frame according to the transverse deviation position of the optical film. In the conveying process of the optical film, the deviation rectifying sensor can monitor the transverse position of the optical film in real time, when it is detected that the optical film deviates transversely, the pushing air cylinder can be controlled to drive the movable frame to transversely move along the first guide rail assembly, the optical film is rapidly adjusted to the correct position, automatic deviation rectifying is achieved, and the production efficiency is improved. And the conveying stability of the optical film is improved.

The utility model relates to an optical composite film. The optical composite film sequentially comprises a first prism layer, a first base material layer, a haze attaching layer, a second prism layer, a second base material layer and a high-haze diffusion layer from top to bottom. Wherein the first prism layer adopts a microstructure design, the bottom width of the first prism layer is smaller than that of the second prism layer, the bad phenomenon of light interference is avoided, the second prism layer is composed of a prism group composed of high prisms and low prisms, and multi-angle and multi-layer regulation and control of light are achieved. In addition, due to the arrangement of the haze attaching layer and the high-haze diffusion layer, the diffusion effect and the shielding performance of the optical composite film are enhanced. Through the integrated design, the functions of a traditional multi-layer optical film and a diffusion plate are combined into a single film, the product weight and thickness are reduced, the product structure and the assembly process are simplified, and the production efficiency and reliability are improved. High optical gain is maintained, high shielding performance is achieved, and the advantages of improving display image quality, reducing product weight and thickness, simplifying product structure and assembly process and the like are achieved.

Provided is an adhesive composition from which an adhesive layer having excellent heat-resistant durability can be formed. This adhesive composition comprises a (meth)acrylic resin, a crosslinking agent, a silane compound, and an ionic compound, wherein: the (meth)acrylic resin contains, as monomer units, an alkyl (meth)acrylate having a homopolymer glass transition temperature of lower than 0ºC, an alkyl (meth)acrylate having a homopolymer glass transition temperature of at least 0ºC, and a monomer having a polar group; and the ionic compound contains a cyano group-containing anion.

The invention relates to the field of high polymer materials, and discloses a preparation method and application of high-temperature-resistant transparent modified polyester. The preparation method comprises the following steps: 1) blending 9, 9-di-[(4-phenylphenoxy) dibenzoic acid] fluorene with diacid and dihydric alcohol, and carrying out esterification reaction; and 2) carrying out condensation polymerization on the esterification product to obtain the high-temperature-resistant transparent modified polyester with the glass transition temperature of more than 70 DEG C. According to the invention, 9, 9-di-[(4-phenylphenoxy) dibenzoic acid] fluorene is used as a modification monomer, and is copolymerized with other dibasic acids and dihydric alcohols to synthesize the modified polyester, and the modified polyester has high transparency and still has good mechanical properties and dimensional stability at high temperature. Therefore, the high-temperature-resistant transparent modified polyester is applicable to the application fields of optical films, optical lenses, reflective protective films, optical fibers or liquid crystal displays and the like.