41results about How to "Guaranteed reflectivity" patented technology

The invention relates to the field of fabrication of a solar cell, in particular to a surface passivation and anti-reflection technology of crystalline silicon cell for improving photoelectric conversion efficiency. Aiming at the existing cell technology process flow, nanometer lamination of a material such as SiO2, Al2O3 and SiNx and a composite material are fabricated by atomic layer deposition and plasma atomic layer deposition, passivation layer plating is carried out on the front surface and the back surface of the crystalline silicon cell, so that the minority carrier lifetime is prolonged, and the photoelectric conversion efficiency of the cell is improved; and SiNx anti-reflection layer plating can be continuously carried out after passivation layer plating, so that passivation and anti-reflection processes can be integrated in the same flow, the cost is reduced, and the yield is improved. The fabrication method is particularly and suitably used for combining with a black silicon technology, and multiple processes are avoided; and moreover, for a double-sided battery, the fact that double-sided passivation is carried out by using the fabrication method is a necessary choice.

The invention discloses a method for manufacturing a silicon solar cell. In the process of manufacturing a PN junction on a silicon wafer, a selective diffusion technology method is adopted, i,e. laser is utilized to heat a position, on which a positive electrode intends to be manufactured, on the surface of the silicon wafer; and under the action of heating, phosphorus in a phosphorus source uniformly adhered on the surface diffuses towards the inner of the silicon wafer, thus a heavy doping zone with smaller sheet resistance is formed at the position on which the positive electrode intends to be manufactured to effectively reduce the sheet resistance of the silicon solar cell, thereby not only being beneficial for increasing the open-circuit voltage of the silicon solar cell; the increase of the open-circuit voltage effectively improves the conversion efficiency of the silicon solar cell, reduces ohmic contact of a metal electrode and the silicon solar cell, thereby reducing the series resistance of the silicon solar cell, and being capable of meeting the purpose of industrialized production better.

Especially, the invention is related to method for exploring petroleum. The direct carbon hydrogen detection factor utilized is Lame's constant reflectivity, shear modulus reflectivity, compressive bulk modulus reflectivity, difference between Lame's constant reflectivity and shear modulus reflectivity, and summation of Lame's constant reflectivity and shear modulus reflectivity. When the method determines the direct carbon hydrogen detection factor, approximate formula of longitudinal wave reflection coefficient in Zeoppritz combined equations utilized in the method is first approximate formula and second approximate formula.

The invention discloses a selective wool fabricating method for a solar battery, which comprises the following steps that firstly, cover film is made on a surface of a monocrystal silicon circle, the front side of the monocrystal silicon circle used for contacting a part of a front electrode and the whole back side of the monocrystal silicon circle are covered by cover film; then the wool fabricating with alkali is carried out to enable the part not covered by cover film of the monocrystal silicon circle surface to form a pyramid pile; and finally the cover film is removed. According to the method, areas for fabricating BusBar and Finger on the front side and the back side of the monocrystal silicon sheet are protected by the cover film, and are used for pre-cleaning or wool fabricating with acid instead of being used for wool fabricating with alkali, and wool fabricating with alkali is carried out on other areas of the monocrystal silicon sheet, through the selective wool fabricating manner, a light-receiving area of a battery is not affected, a reflectivity of the pile is ensured, and a contacting resistance is reduced, therefore the photoelectric conversion efficiency of the solar battery is increased.

The invention discloses a reflection silver mirror used for solar energy thermal power generation. The reflection silver mirror comprises ultrawhite ultrathin glass and substrate glass of a parabolic shape. A front surface of the ultrawhite ultrathin glass is plated with a highly transparent self-cleaning film layer. A back surface of the ultrawhite ultrathin glass is plated with an Al[2]O[3] bonding layer which is plated with an Ag reflecting layer. The above plated ultrawhite ultrathin glass is integrally fixed on a paraboloid of the substrate glass through the bonding layer. The reflection silver mirror has the advantages of high reflectivity and good weather resisting property.

The invention relates to an organic luminescent device, especially to an organic luminescent device that enables luminous efficiency of the device to be improved and service life of the device to be prolonged by improving a cathode layer. More particularly, the invention relates to an organic electroluminescent device having a multilayer cathode. The device comprises: a glass substrate; an anode layer, which is on the glass substrate; an organic material layer, which is formed on the anode layer; an electron injecting layer, which is formed on the organic material layer; and a cathode layer, which is formed on the electron injecting layer. Besides, the cathode layer at least includes a first metal layer and a second metal layer or an alloy layer; and the second metal layer or the alloy layer at least contains a low-work function metal. According to the invention, an electron injection capability of the device can be effectively enhanced by improving a cathode, so that luminous efficiency of the device can be substantially improved. And moreover, the service life of the device will not be obviously reduced because an active metal component is used in the multilayer cathode.

The invention belongs to the field of an optical fiber sensing technology, and particularly relates to a fiber bragg grating humidity sensor with non-grating areas being coated with polyimide. The fiber bragg grating humidity sensor with the non-grating areas being coated with the polyimide comprises a monomode optical fiber and a hollow-out base plate, wherein the monomode optical fiber is fixedonto the hollow-out base plate through a UV (Ultraviolet) adhesive; an optical fiber Bragg grating is laser-engraved on the monomode optical fiber at the middle hollow-out part on the hollow-out baseplate; polyimide films are respectively covered on the non-grating areas at two ends of the optical fiber Bragg grating so as to form a 'polyimide film-fiber Bragg grating-polyimide film' structure. The fiber bragg grating humidity sensor with the non-grating areas being coated with the polyimide provided by the invention has the advantages of simple structure, high measurement accuracy, good linearity, high temperature resistance, electromagnetic interference resistance and the like, can realize multi-point quasi-distributed sensing, and has a wide application prospect.

The invention provides an artificial intelligence cleaning robot cooperative cleaning method and system. The method comprises the steps that 1, a control center dispatches a certain number of robots according to the area of a map of cleaned solar cell panels or heliostats, and enables the robots to be scattered to all positions of the area needing to be cleaned; 2, solar cell panels or heliostats at various positions are evaluated, and a result is sent to the control center; 3, the control center obtains a deployment scheme according to deployment logics after evaluating the cleaning requirement and the robot cleaning capacity, and redeploys the robots; and 4, after each time of deployment and completion of a cleaning task, big data analysis is carried out on the deployment scheme and the robot capability by using a machine learning method, and the deployment logics are continuously optimized. According to the artificial intelligence cleaning robot cooperative cleaning method and system, an artificial intelligence algorithm can be used for deploying and commanding the plurality of intelligent cleaning robots to be put as required, the cleaning manner is optimized, the cleaning effect is further improved, and the cleaning efficiency is improved.

The invention provides a manufacturing method of a light emitting diode. The manufacturing method comprises the steps: (1) manufacturing a light emitting epitaxial structure on the surface of a sapphire substrate; (2) forming a front scribe lane in the sapphire substrate; (3) completing a chip preparation technology; (4) grinding and thinning; (5) forming a V-shaped groove in the back surface of the sapphire substrate, according to the front scribe lane; (6) cleaning; (7) manufacturing reflecting layer structures on the back surface of the sapphire substrate and the surface of the V-shaped groove; (8) splitting the light emitting epitaxial structure. According to the manufacturing method, SiO2 layers and Ti3O5 layers which are alternately stacked have good reflecting effects; ultrathin middle Ni layers are adopted, so that the reflectivity is not reduced, the bonding performance of Ag reflecting layers and medium laminations is greatly improved, and the Ag reflecting layers are prevented from falling off; the Ni layer and the Ag layers which are alternately stacked are settled in the V-shaped groove, certain extension can be generated during splitting, so as to cover the side walls of the Ag reflecting layers, the side walls of the Ag reflecting layers can be preferably prevented from being oxidized, and the stability and reflectivity of the reflecting layer structures are guaranteed.

The invention discloses a differential absorption spectrometer optical system based on geosynchronous orbit observation. The differential absorption spectrometer optical system comprises a scanning mirror system, a front telescopic imaging system and an Offner spectral imaging system, wherein the scanning mirror system comprises a scanning mirror, the front telescopic imaging system comprises a primary mirror, a secondary mirror and a third reflecting mirror, an aperture diaphragm is arranged at the front end of the secondary mirror, the Offner spectral imaging system comprises an entrance slit, an optical filter, a depolarizer, a first concave reflector, a convex grating, a second concave reflector and an area array detector, the scanning mirror introduces sky-bottom information detected based on a geosynchronous orbit into the front telescopic imaging system through scanning and focuses the sky-bottom information to the entrance slit, and spectral information of a detected target object is reflected to the first concave reflector by the Offner spectral imaging system after light filtering, depolarization and turning, then is split to the second concave reflector by the convex grating, and finally is focused on the area array detector, so that high-spectral and spatial-resolution detection is completed.

The invention relates to a LED high reflectivity ultrathin coating film. The LED high reflectivity ultrathin coating film comprises a carrier layer, a high transparency polyimide layer, a metal plating layer, an adhesion agent layer, and a release layer which are arranged in a laminated manner; the thickness of the high transparency polyimide layer is controlled to be 3 to 50<mu>m; the thickness of the metal plating layer is controlled to be 0.1 to 3<mu>m; the thickness of the adhesion agent layer is controlled to be 3 to 100<mu>m; and preferably, the polyimide material which is high in glasstransition temperature (Tg), hardness, L* value, and penetration rate, low in a* value, b* value, haze degree, coefficient of expansion, bounciness, heat conduction coefficient, and refractive rate, and possesses system high temperature resistance is selected. The LED high reflectivity ultrathin coating film is high in reflectivity, excellent in bonding performance and optical performance, is light and thin, is long in service life, and possesses bending resistance; and the reflectivity is 94% or higher.

The invention belongs to the technical field of automobile lamp surface treatment, and particularly discloses an automobile lamp coating process. The automobile lamp coating process mainly comprises the following main seven steps of carrying out surface cleaning, carrying out PP vacuum plating treatment agent surface treatment, carrying out electrostatic dust removal, carrying out UV primer spraying, carrying out aluminum film coating, carrying out secondary protective film plating and carrying out UV finish paint spraying. According to the coating process, a PP vacuum plating treatment agentis taken as the middle layer, so that the adhesive force of an aluminum plating layer is greatly improved, meanwhile, plating of a protective film is carried out on the outer surface of the aluminum plating layer twice, and UV finish paint is sprayed so that the outer surface of the outer surface of the aluminized layer can be effectively protected, and the service life of a lamp is prolonged on the premise that the reflectivity of the vehicle lamp is guaranteed.

The invention discloses a pyramid rapid texturing solution and a texturing method and silicon wafer product thereof. The pyramid rapid texturing solution comprises the following main components: a silver ion source, a copper ion source, a fluorine ion source, an oxidant and deionized water. The pyramid rapid texturing solution can be used for rapidly texturing the surface of a silicon wafer at room temperature, an independent, complete, uniform and tightly arranged positive pyramid textured structure can be formed on the surface of the silicon wafer within an extremely short time, the size ofthe structure is 0.5-2 microns, and the surface reflectivity is 8-20%. Compared with existing line production pyramid structures, the pyramid rapid texturing solution has the advantages that: the tower tip is smooth and more uniform in distribution, is very beneficial to back polishing and passivation, and is particularly suitable for existing PERC, HIT, IBC and other efficient battery structures.The pyramid texturing method provided by the invention has the advantages that: the overall reaction time is controlled within 5 minutes, the time cost and the equipment cost can be greatly reduced,and the wide popularization and application are facilitated.

The invention discloses a special absorbing coating for a solar vacuum tube and a preparation method thereof. A composite absorption film in the absorbing coating is made of the following components by weight: 10-15 parts of aluminum nitride, 15-27 parts of graphene, 20-28 parts of acrylic resin, 2-8 parts of aluminum powder, 5-8 parts of cobalt powder, 12-18 parts of aluminum foam, 1-3 parts of amaleic acid grafting agent, 1-3 parts of plant extract and 20-28 parts of a hydrophilic polymer compound. The preparation method comprises the following steps: step 1, mixing all the above components, putting the obtained mixture into a ball mill for grinding, carrying out blending to obtain slurry and performing film drawing to form the composite absorption film; and step 2, sequentially covering the surface of the inner glass tube of the pretreated solar vacuum tube with a reflection film, the composite absorption film and an anti-reflection film in a film pulling manner and carrying out curing to obtain the absorbing coating. The special absorbing coating for the solar vacuum tube in the invention is prepared from a three-layer structure, and the composite absorption film has wide-spectrum infrared absorption and a high conversion rate at low temperature.

The invention discloses a ground three-dimensional laser scanner and a use method, and particularly relates to the technical field of three-dimensional laser scanning. The ground three-dimensional laser scanner comprises a machine body, the outer wall of the machine body is rotatably connected with a support frame, a tracking assembly is installed in the lower part of the support frame, and a protection assembly is installed in the upper part of the support frame. Through the arrangement of the tracking assembly, the reflecting prism of the three-dimensional laser scanner can accurately rotate along with the change of the orientation of the to-be-detected object on the ground, so that the reflecting prism and the to-be-detected object are always located on the same detection line, the orientation of the to-be-detected object is accurately and automatically tracked, the three-dimensional laser scanning precision is high, the scanning error is reduced, the accuracy of a data analysis result is improved, the practicability is high, through the arrangement of the protection assembly, the ground three-dimensional laser scanner can keep a working state in severe weather environments such as rain, snow and hail, the application occasion of the scanner is expanded, and the applicability of the scanner is improved.

The invention discloses a photovoltaic white adhesive film which is composed of a white adhesive film reflecting layer I and a white adhesive film reflecting layer II which are arranged in a stacked mode, the reflectivity of the reflecting layer I ranges from 75% to 95%, and the reflectivity of the reflecting layer II ranges from 10% to 85%. The reflectivity of the reflecting layer I is higher than that of the reflecting layer II. The two adhesive film reflecting layers are compounded through a compounding process, or the reflecting layers are laid on the back surface of the battery piece andlaminated. A reflective filler is added into the white adhesive film; and the reflective filler is selected from titanium dioxide, silicon dioxide, glass beads and the like. According to the compositephotovoltaic white adhesive film, the cost of the reflective filler can be reduced (the addition amount of the reflective filler in the adhesive film with low reflectivity is lower, or the reflectiveadhesive film is prepared by adopting the reflective filler with low cost) on the premise of the same power gain; or higher or the same power gain is obtained on the premise that the addition amountof the reflective filler is the same or lower, and very high economic value and promotional value are achieved.

The invention discloses a DBR structure and an LED chip provided with the DBR structure. At least three groups of film systems are included. The center wavelength of the first group of film systems islambda1. The center wavelength of the third group of film systems is lambda3. The center wavelength of the second group of film systems located between the first group of film systems and the third group of film systems is lambda2, wherein the lambda2 satisfies the following equation: lambda2=(lambda1+lambda3) / 2. The optical thickness d1 of the first group of film systems is equal to the opticalthickness d3 of the third group of film systems. The optical thickness d2 of the second group of film systems is (lambda2 / lambda1+lambda3 / lambda2) / 4 times the thickness of the third or first group offilm systems. In the invention, under the condition of guaranteeing small-angle incident light reflectivity, large-angle incident light reflectivity is increased and the brightness of the LED chip isgreatly increased too.

The invention discloses a silver spraying-free polypropylene alloy for a lower bumper guard plate and a preparation method of the alloy. The alloy is prepared by mixing 48-72 parts of polypropylene, 8-12 parts of polyethylene, 15-30 parts of an inorganic filler, 5-10 parts of a toughening agent, 0.2-0.8 part of an antioxidant, 0.2-0.5 part of a light stabilizer, 1-3 parts of metal powder, 0.2-0.5part of a coupling agent and 0.2-1 part of a lubricant and then extruding the mixture for granulating. The polypropylene alloy prepared by means of the method can be matched with a high-gloss mirror surface mold to obtain high gloss and a great appearance with a metal effect without spraying and direct injection molding. Compared with a paint spraying process, the method has the advantages that the cost is greatly reduced, and scrapping caused by a paint shedding problem in a use process of a product is avoided at the same time; a preparation process is simple, and the obtained polypropylene alloy has great comprehensive performance and completely meets the performance requirements of bumpers for materials; meanwhile, a finished product has an obvious metal effect and can be used as a lower bumper guard plate material in cooperation with the high-gloss mold for injection molding.

The invention discloses a display panel and a mobile terminal. The display panel comprises a color resistance layer and a reflecting layer arranged on one side of the color resistance layer, the color resistance layer comprises a plurality of color resistance units, and at least part of the color resistance units comprise at least two first color resistance blocks and second color resistance blocks located between every two adjacent first color resistance blocks; the reflecting layer is used for reflecting incident light penetrating through the color resistance layer to the light emitting side of the display panel; the first color resistance blocks are thicker than the second color resistance blocks; according to the display panel, the first color resistance block and the second color resistance block which are different in thickness are arranged in the color resistance unit, so that part of light can penetrate through the second color resistance block, the color gamut of emergent light of the display panel is increased on the premise that the reflectivity of the display panel is guaranteed, and the display effect of the display panel is improved.

The invention discloses a light emitting diode with a reflector protective layer. The light emitting diode comprises an N-type electrode, an N-type semiconductor layer, a light emitting layer, a P-type semiconductor layer, a metal reflecting layer, the protective layer, a buffering layer, a combination layer, a permanent substrate and a P-type electrode, wherein the N-type electrode, the N-type semiconductor layer, the light emitting layer, the P-type semiconductor layer, the metal reflecting layer, the protective layer, the buffering layer, the combination layer, the permanent substrate and the P-type electrode are sequentially stacked, the protective layer is made of metallic oxide and forms a hollowed frame pattern, the edge of the metal reflecting layer is covered or supported with the frame pattern, therefore, the metal reflecting layer can be protected through surrounding and shielding of the protective layer and prevented from being oxidized in the follow-up manufacturing process, the deserved reflectivity of the metal reflecting layer can be maintained, and accordingly the light emitting efficiency and the electrical stability of the light emitting diode are improved.

The invention relates to the field of fabrication of a solar cell, in particular to a surface passivation and anti-reflection technology of crystalline silicon cell for improving photoelectric conversion efficiency. Aiming at the existing cell technology process flow, nanometer lamination of a material such as SiO2, Al2O3 and SiNx and a composite material are fabricated by atomic layer deposition and plasma atomic layer deposition, passivation layer plating is carried out on the front surface and the back surface of the crystalline silicon cell, so that the minority carrier lifetime is prolonged, and the photoelectric conversion efficiency of the cell is improved; and SiNx anti-reflection layer plating can be continuously carried out after passivation layer plating, so that passivation and anti-reflection processes can be integrated in the same flow, the cost is reduced, and the yield is improved. The fabrication method is particularly and suitably used for combining with a black silicon technology, and multiple processes are avoided; and moreover, for a double-sided battery, the fact that double-sided passivation is carried out by using the fabrication method is a necessary choice.

The invention discloses a universal LED functional lamp which comprises a barrel. A universal interface is arranged on the upper portion of the barrel through a grid cover; a DC power supply is arranged in the grid cover and connected with an LED module; a cooling fin is arranged behind the LED module; and the cooling fin is of a structure in which the cross section is in a snowflake shape or is provided with a plurality of through holes and a plurality of fin bodies or guide tubes are arranged in the vertical direction. A reflecting cover is arranged on the front face of the LED module, and is in a horn opening shape, and the opening of the reflecting cover faces outwards. The inner face of the reflecting cover is coated with a reflecting film, and a plurality of reflecting rings are arranged on the reflecting cover. A light homogenizing plate or acrylic plate is arranged outside the reflecting cover through the barrel. The universal LED functional lamp is directly mounted, is simple in structure and convenient to mount, and has the application and popularization value; meanwhile, through the barrel and the structure of the multiple fin bodies or the guide tubes of the cooling fin, a flow guide chimney type cooling structure is formed in the barrel, the cooling purpose is achieved through the inherent effect of air, the universal LED functional lamp is simple in structure, economical and practical, and the cooling problem of the LED module is solved.

The invention discloses a back coating type glass reflector arranged in a street lamp. The reflector consists of a shell and a reflecting film, wherein the section of the shell is in an arc shape; the reflecting film is covered on the arc external surface of the shell, and consists of a reflecting layer and an external protective layer; the reflecting layer is coated on the external surface of the shell, the external protective layer is tightly jointed with the reflecting layer and is coated on the upper face of the reflecting layer; the shell is prepared from a novel material, namely, borosilicate glass with the advantages of high light transmittance, high temperature resistance, lower thermal expansion coefficient and the like, thus the maintenance factor of the lamp is improved; and in addition, the reflecting film is prepared from a novel material by a novel film coating process, the reflecting layer is made of a metallic silver material, and the external protective layer is prepared from a vulcanization-proofing material, thus the initial efficiency of the lamp is greatly enhanced. The reflector has the advantages that the maintenance factor of the lamp is effectively improved, the initial efficiency of the lamp can be preferably maintained for a long time, and the purposes of enhancing the lighting effect, saving electric energy, reducing investment and realizing green lighting are achieved.

The present invention provides an artificial intelligence cleaning robot collaborative cleaning method and system. The method includes: Step 1: According to the area of ​​the solar panel or heliostat map to be cleaned, the control center sends a certain number of robots to disperse to each area that needs to be cleaned. Location; Step 2: Evaluate the solar panels or heliostats at each location, and send the results to the control center; Step 3: After evaluating the cleaning needs and robot cleaning capabilities, the control center obtains a deployment plan according to the deployment logic and redeploys Robot; Step 4: After each deployment and cleaning task is completed, use machine learning methods to conduct big data analysis on the deployment plan and robot capabilities, and continuously optimize the deployment logic. The present invention can use artificial intelligence algorithm to deploy and command multiple intelligent cleaning robots according to the logic of on-demand delivery, optimize the cleaning method, further improve the cleaning effect and improve the cleaning efficiency.

The invention discloses a full-automatic silicon ring flatness light sensation detection method and device. The method comprises the steps that sorting equipment sorts the silicon rings to a clamping component arranged on a conveying belt, and the conveying belt conveys the silicon rings to a flatness detection area and stops conveying; image acquisition and infrared distance measurement equipment arranged on each side of the conveyor belt respectively acquires a ring surface image of a silicon ring surface on one side and sends the ring surface image to a processor; the processor divides the ring surface image into a plurality of distance measurement areas, determines a plurality of infrared distance measurement points in each distance measurement area, and generates a distance measurement signal containing infrared distance measurement positioning information; the image acquisition and infrared distance measurement equipment performs infrared distance measurement after positioning the infrared distance measurement areas and the distance measurement points according to the distance measurement signal, and sends distance measurement data to the processor; and the processor calculates the flatness grade of the silicon rings and generates a grading signal, and the sorting equipment sorts the silicon rings to the designated recovery equipment according to the sorting signal. According to the full-automatic silicon ring flatness light sensation detection method and the device, and streamlined and full-automatic detection of the flatness of the silicon rings is realized.

The invention discloses a PS light guide plate with double surfaces of point-like microstructures. The light guide plate comprises a transparent plate body of a PS material; the transparent plate body includes a light output surface and a reflection surface, light is output via the light output surface, and the reflection surface is opposite to the light output surface; the reflection surface is provided with reflection projections of the same size, the light output surface is provided with scattering projections of the same size, the reflection projections of the spherical cap shape are arranged in a quincunx manner, the scattering projections of the spherical cap shape are arranged in the quincunx manner, and both the reflection projections and the scattering projections are made of the PS material and molded with the transparent plate body in the integrated manner; and the bottom diameter and height of the scattering projections are lower than those of the reflection projections respectively. According to the invention, the light conversion rate can be higher than 80% needless of light guide particles, a traditional laser engraving technology is changed, and the production cost is reduced; the scattering projections further scatter light of the light output surface, and the uniformity of output light can be over 85%; the scattering and reflection projections and the transparent plate are of the same material and molded in the integrated manner to avoid light loss; and the scattering and reflection projections of quincunx arraignment improve the space utilization rate and ensure the reflection rate and the scattering rate.

The invention belongs to the technical field of motorcycle reflectors, and particularly relates to a primer-free aluminum plating process for a motorcycle LED reflector. Aiming at the problem that themanufacturing process is too complex in the prior art, the invention provides the primer-free aluminizing process for the motorcycle LED reflector. The process comprises the following steps: 1, melting and stirring reflector raw materials until the reflector raw materials are uniformly mixed; 2, injecting the uniformly mixed molten raw materials into a forming mold by using an injection molding machine, maintaining the pressure, opening the mold, ejecting, naturally cooling, polishing by using a milling machine, and immersing into a cyclohexanone solution for 5-10 minutes to obtain a semi-finished product; and 3, assembling a heat dissipation assembly on the semi-finished product obtained in step 2 to obtain a reflector finished product. By improving the raw material composition of the reflector, the reflectivity of the product is guaranteed, meanwhile, primer coating is not needed, the sprayed paint photocuring process is simplified, and the production cost is reduced.

The invention provides a side window film. The side window film comprises a base material layer, a first optical layer, a second optical layer and an anti-oxidation layer, wherein the first optical layer is arranged on the base material layer; the second optical layer is arranged on the surface, far away from the base material layer, of the first optical layer; refractive indexes of the first optical layer and the second optical layer are different; and the anti-oxidation layer is arranged on the surface, far away from the first optical layer, of the second optical layer. As the first opticallayer and the second optical layer are arranged in the wide window film and the refractive indexes of the first optical layer and the second optical layer form a matching effect, the light transmittance and reflectivity of the side window film are guaranteed; and meanwhile, by using inherent ageing resistance of the two optical layers, the ageing, discoloring and even cracking of the side window film are put off, and the service life of the side window film is prolonged. In addition, by using the anti-oxidation layer arranged on the outermost side, the first optical layer, the second optical layer and the base material layer are effectively stopped from being eroded by water vapor and oxygen in the air, and the service life of the side window film is prolonged.