High-precision microwave grinding optical anti-dazzling screen and production method thereof

Abstract

The invention discloses a high-precision microwave grinding optical anti-dazzling screen and a production method thereof.The production method comprises the steps that an anti-dazzling screen base material is selected, surface cleaning and pretreatment are conducted on the anti-dazzling screen base material, and the anti-dazzling screen base material is punched through a precision die and punching equipment in a matched mode to form a shape and a hole with the preset diameter; according to the production method of the anti-dazzling screen, the target grinding time and speed are set according to the sample test result, and the appropriate special composite material is selected to grind the surface of the anti-dazzling screen after punching so as to eliminate the gloss, in the production method of the anti-dazzling screen, the diaphragm hole is rapidly formed through punching, and the surface gloss is removed through grinding and delustering; meanwhile, the optical characteristics of the anti-dazzling screen are improved, the functional performance of a final product can be improved, stable production of the high-quality anti-dazzling screen is achieved from material selection to final product completion through cooperation of multiple production links, and the anti-dazzling screen is suitable for the optical application field with strict requirements and has wide application prospects. And the product yield, the production process optimization and the market adaptability are excellent.

Description

Technical Field

[0001] The invention relates to the technical field of shading sheet production, and in particular to a high-precision microwave-polished optical shading sheet and a production method thereof. Background Art

[0002] As described in the published patent "An Anti-glare Shading Sheet" with publication number CN216561327U, in recent years, smart electronic products such as mobile phones and tablet computers have been flooded in the lives of modern people, and the imaging devices installed on electronic products have also flourished. With the development of science and technology, users have higher and higher requirements for the quality of portable electronic devices. The current mainstream market for optical shading sheet materials is PET and PI sheets. The main advantage is that they are easy to form and the reflectivity is lower than that of the original material after the surface is treated with a carbon layer. The disadvantages are high cross-section reflection after punching, obvious glare, poor temperature resistance, and easy deformation after ring testing. When used in smart electronic products, they cannot support the use of imaging equipment for a long time and under different temperature conditions. Hard and high-strength materials, such as metal materials, have the problem of high reflection. During use, it is easy to cause high reflectivity and cause stray light to be generated when the lens is actually shot, affecting the imaging effect. For this reason, we propose an anti-glare shading sheet.

[0003] In summary, the existing shading sheet has a high reflectivity, which causes stray light to be generated during actual lens shooting. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0005] To achieve the above object, the present invention provides the following technical solutions: A method for producing a high-precision microwave-polished optical shading sheet comprises the following steps: S100: punching, selecting a shading sheet substrate, cleaning and pre-treating the surface of the shading sheet substrate, so that the outer surface of the shading sheet substrate forms a smooth first working surface, and punching and cutting the shading sheet substrate into a shape and holes of a predetermined diameter by using a precision mold and a punching device; S200: Grinding and matting: select a small amount of samples and use a high-precision grinder to conduct preliminary grinding tests to test the matting effect under the preliminary grinding test. Set the target grinding time and speed according to the sample test results, select a suitable special composite material to grind the surface of the shading sheet after punching to eliminate the gloss, so that the outer surface of the shading sheet substrate forms the second working surface of microwave grinding; S300: ultrasonic cleaning, using ultrasonic cleaning equipment to clean the second working surface of the light shielding sheet after the grinding process; S500: drying, drying the cleaned second working surface of the light shielding sheet; S600: Dust and static removal, using physical methods to remove dust particles and static charges on the second working surface of the shading sheet. As a further solution of the present invention: S100 includes the following steps: S110: The shading sheet substrate is selected as an optical shading sheet with low reflectivity; S120: Surface cleaning and pretreatment of the shielding sheet substrate includes using an optical microscope with image analysis software to observe and measure the particle size on the surface of the shielding sheet substrate, using ultrasonic cleaning to remove dust and grease from the surface of the shielding sheet substrate, and using a drying device to dry the shielding sheet substrate so that the particle density on the surface of the shielding sheet substrate is ≤5 / cm² and the size of a single particle on the surface of the shielding sheet substrate is ≤<10μm; S130: The shading sheet substrate is fixed on a precision mold, and the precision mold includes a clamping component with a circular periphery. The center of the clamping component is provided with an aperture hole punch with a diameter of ≤0.2mm. The punching equipment is used to perform periphery punching and center punching operations on the shading sheet substrate to prepare a semi-finished shading sheet.

[0006] As a further solution of the present invention: S200 includes the following steps: S210: The specially prepared composite material used in the grinding and matting step includes the following proportions by weight: modified epoxy resin accounts for 14% of the total amount, silicone rubber accounts for 6%, nano-diamond powder (mixed with different particle sizes) accounts for 18%, cubic boron nitride (cBN) powder accounts for 8%, and ultrafine alumina (Al 2 O 3 ) accounted for 12%, green silicon carbide powder (SiC) accounted for 3%, polyurethane elastomer microspheres accounted for 5%, zirconium oxide (ZrO 2 ) accounted for 3%, carbon nanotubes or graphene accounted for 2%, and molybdenum disulfide (MoS 2 ) and hexagonal boron nitride (h-BN) accounted for 4%, self-healing microcapsules accounted for 2%, carbon black or metal oxides accounted for 4%, phosphate buffer accounted for 2%, polyacrylic acid polymers accounted for 1%, polyethylene wax accounted for 2%, UV absorbers accounted for 1%, and antistatic agents accounted for 1%; S220: Select a number of semi-finished shading sheets and place them in a number of high-precision grinders, wherein the high-precision grinders are equipped with the special composite material described in step S210, and the grinding time of the high-precision grinders is 10 min, 15 min, 20 min, 25 min, and 50 min, respectively; the grinding speed of the high-precision grinders is 300 rpm, 400 rpm, 500 rpm, 600 rpm, and 1000 rpm, respectively; S230: Detect the semi-finished shading sheets processed by the multiple high-precision grinders in step S220 respectively. If the semi-finished shading sheets in a certain high-precision grinder meet the detection requirements, select the high-precision grinder as the target grinder, and the operating parameters of the high-precision grinder are the target parameters; If multiple semi-finished parts of the shading sheet processed by multiple high-precision grinders meet the inspection requirements, the operating parameters in the high-precision grinder with the shortest operating time are selected as the target parameters; S260: placing the semi-finished shading sheet in a target grinding machine, and grinding the punched semi-finished shading sheet using target parameters to eliminate gloss, so as to obtain a finished shading sheet.

[0007] As a further solution of the present invention: S300 includes the following steps: S310: Use ultrasonic cleaning equipment to clean the finished shading sheet, and the operating frequency of the ultrasonic cleaning equipment is between 80KHz and 130K.

[0008] As a further solution of the present invention: S500 includes the following steps: S510: Preparation before drying: perform a preliminary inspection on all shading sheets before drying to ensure that there are no obvious contaminants or defects on the surface; S520: Environmental preparation, set up a dedicated oven, and ensure that the cleanliness inside the oven meets ISO Class 3 or above standards; S530: Temperature control, setting the drying temperature in the oven to 50 degrees Celsius; S540: Humidity monitoring, a high-precision humidity sensor is installed in the oven to ensure that the relative humidity does not exceed 5%RH; S550: Airflow management, the oven is equipped with a controllable airflow system, and the air flow rate is controlled at 0.1-0.5m / s; S560: using a gradual temperature increase method to slowly transition the shading sheet from room temperature to a target temperature of 50 degrees Celsius; S570: The oven is equipped with an abnormal temperature alarm mechanism. Once the temperature is detected to be out of the set range, the alarm is triggered immediately; S580: Cooling and post-processing. After drying, the finished shading sheet in the oven is naturally cooled to near room temperature.

[0009] As a further solution of the present invention: the S600 comprises the following steps: S610: Initial air spraying, using HEPA-filtered high-pressure compressed air to spray the surface of the shading sheet to remove dust and larger particles; S620: Static electricity elimination, using an ion air gun to neutralize the surface charge of the shading sheet; S630: Secondary air injection, using high-pressure compressed air again for detailed spraying to ensure no residual dust; S640: Vacuum cleaning, for fine dust that is difficult to remove with air jets, a highly sensitive vacuum cleaning device is used to suck away the remaining fine particles; S650: Perform final inspection of the shading sheet surface using a non-contact laser scanner or optical microscope.

[0010] A high-precision microwave-polished optical shading sheet is produced by adopting the above-mentioned production method.

[0011] Compared with the prior art, the present invention has the following beneficial effects: In the shading sheet production method described in the present invention, the aperture hole is quickly formed by punching, the surface gloss is removed by grinding and matting, and the optical properties of the shading sheet are improved at the same time, which helps to improve the functional performance of the final product. Through the coordination of multiple production links, from the selection of materials to the completion of the final product, the stable production of high-quality and high-performance shading sheets is achieved. The shading sheets are suitable for use in optical applications with strict requirements, the reflectivity of the shading sheets is reduced, and the problem of stray light in actual lens shooting is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a flow chart of steps S100-S600 in the present invention; Figure 2 is a flow chart of steps S110-S130 in the present invention; Figure 3 It is a flow chart of steps S2100-S260 in the present invention. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1-3 A method for producing a high-precision microwave-polished optical shading sheet comprises the following steps: S100: punching, selecting a shading sheet substrate, cleaning and pre-treating the surface of the shading sheet substrate, so that the outer surface of the shading sheet substrate forms a smooth first working surface, and punching and cutting the shading sheet substrate into a shape and holes of a predetermined diameter by using a precision mold and a punching device; S200: Grinding and matting: select a small amount of samples and use a high-precision grinder to conduct preliminary grinding tests to test the matting effect under the preliminary grinding test. Set the target grinding time and speed according to the sample test results, select a suitable special composite material to grind the surface of the shading sheet after punching to eliminate the gloss, so that the outer surface of the shading sheet substrate forms the second working surface of microwave grinding; S300: ultrasonic cleaning, using ultrasonic cleaning equipment to clean the second working surface of the light shielding sheet after the grinding process; S500: drying, drying the cleaned second working surface of the light shielding sheet; S600: Dust and static electricity removal, using physical methods to remove dust particles and static electricity on the second working surface of the shading sheet; The use of precision molds and punching equipment for punching can ensure the dimensional accuracy of the shading sheet and the holes, and improve the consistency and quality stability of the product; The grinding and matting step not only removes the surface gloss, but also may improve the optical properties of the mask, such as reducing reflections and improving contrast, which helps to improve the visual effect or functional performance of the final product; Ultrasonic cleaning can penetrate into the tiny pores of the shade sheet to remove residues, not just surface contaminants, thus ensuring a high degree of cleanliness of the shade sheet; Ensure that the shade sheet is thoroughly and evenly dried to avoid quality problems such as deformation and mildew caused by residual moisture; The dust removal step reduces dust particles on the finished product, which, for example, can cause malfunctions or reduce image quality in a mobile phone camera. The static charge on the surface of the shading sheet easily attracts dust and other fine particles. The static removal step can prevent this from happening, further improving the cleanliness of the product and reducing interference during subsequent processing or use; Setting grinding time and speed through sample testing and selecting suitable special composite materials can not only ensure product quality, but also improve production efficiency and reduce costs; In summary, in the shading sheet production method described in the present invention, the aperture hole is quickly formed by punching, the surface gloss is removed by grinding and matting, and the optical properties of the shading sheet are improved at the same time, which helps to improve the functional performance of the final product. Through the coordination of multiple production links, from the selection of materials to the completion of the final product, the stable production of high-quality and high-performance shading sheets is achieved, which is suitable for use in optical applications with strict requirements, reduces the reflectivity of the shading sheet, and avoids the problem of stray light in actual lens shooting. In the embodiment of the present invention, the S100 includes the following steps: S110: The shading sheet substrate is selected as an optical shading sheet with low reflectivity; S120: Surface cleaning and pretreatment of the shielding sheet substrate includes using an optical microscope with image analysis software to observe and measure the particle size on the surface of the shielding sheet substrate, using ultrasonic cleaning to remove dust and grease from the surface of the shielding sheet substrate, and using a drying device to dry the shielding sheet substrate so that the particle density on the surface of the shielding sheet substrate is ≤5 / cm² and the size of a single particle on the surface of the shielding sheet substrate is ≤<10μm; S130: The shading sheet substrate is fixed on a precision mold, the precision mold includes a clamping component with a circular periphery, the center of the clamping component is provided with an aperture punch with a diameter of ≤0.2 mm, and the shading sheet substrate is punched at the periphery and punched at the center by the punching device to prepare a shading sheet semi-finished product; Selecting optical grade plastic with high light transmittance and low haze as the substrate of the light shield can ensure that the maximum amount of light is allowed to pass through when needed, and there will be no light scattering due to irregularities inside or on the surface of the material, thus ensuring the clarity and accuracy of the imaging; Good mechanical strength means that the shading sheet can withstand the physical stress during installation and various external forces in the use environment, and is not easy to break or deform, which improves the durability and life of the product; Observation and measurement using an optical microscope with image analysis software ensures accurate detection of surface defects on the shielding sheet substrate; Ultrasonic cleaning can effectively remove tiny particles and grease on the surface of the substrate, while the drying equipment ensures that the substrate is dry after cleaning. These measures help reduce defects, improve the optical performance of the shading film, and make subsequent processing smoother; Ensure that the particle density on the surface of the light shielding sheet substrate is ≤5 / cm² and the single particle size is ≤10μm. This not only reduces foreign matter that may affect optical performance, but also reduces the risk of scratches or other damage in precision molds. The use of a clamping component with a perfect circular edge and an aperture punch with a diameter of ≤0.2mm achieves high-precision molding of the light shield. This design ensures the neatness and smoothness of the edge of the light shield, as well as the position accuracy and shape consistency of the center aperture, which is crucial for applications that require precise control of the light path. By using punching equipment to perform peripheral punching and center punching operations, the required shading sheet semi-finished products can be obtained quickly and accurately, which improves production efficiency and ensures the consistency of product quality.

[0015] In the embodiment of the present invention, the S200 includes the following steps: S210: The specially prepared composite material used in the grinding and matting step includes the following proportions by weight: modified epoxy resin accounts for 14% of the total amount, silicone rubber accounts for 6%, nano-diamond powder (mixed with different particle sizes) accounts for 18%, cubic boron nitride (cBN) powder accounts for 8%, and ultrafine alumina (Al 2 O 3 ) accounted for 12%, green silicon carbide powder (SiC) accounted for 3%, polyurethane elastomer microspheres accounted for 5%, zirconium oxide (ZrO 2 ) accounted for 3%, carbon nanotubes or graphene accounted for 2%, and molybdenum disulfide (MoS 2 ) and hexagonal boron nitride (h-BN) accounted for 4%, self-healing microcapsules accounted for 2%, carbon black or metal oxides accounted for 4%, phosphate buffer accounted for 2%, polyacrylic acid polymers accounted for 1%, polyethylene wax accounted for 2%, UV absorbers accounted for 1%, and antistatic agents accounted for 1%; S220: Select a number of semi-finished shading sheets and place them in a number of high-precision grinders, wherein the high-precision grinders are equipped with the special composite material described in step S210, and the grinding time of the high-precision grinders is 10 min, 15 min, 20 min, 25 min, and 50 min, respectively; the grinding speed of the high-precision grinders is 300 rpm, 400 rpm, 500 rpm, 600 rpm, and 1000 rpm, respectively; S230: Detect the semi-finished shading sheets processed by the multiple high-precision grinders in step S220 respectively. If the semi-finished shading sheets in a certain high-precision grinder meet the detection requirements, select the high-precision grinder as the target grinder, and the operating parameters of the high-precision grinder are the target parameters; If multiple semi-finished parts of the shading sheet processed by multiple high-precision grinders meet the inspection requirements, the operating parameters in the high-precision grinder with the shortest operating time are selected as the target parameters; S260: placing the semi-finished shading sheet part in a target grinding machine, and grinding the punched semi-finished shading sheet part using target parameters to eliminate gloss, so as to obtain a finished shading sheet part; A specially formulated composite material containing multiple ingredients is used. Modified epoxy resin is used as a binder to provide good adhesion and chemical stability. Silicone rubber increases flexibility and impact resistance, which helps reduce stress during grinding. Nano diamond powder (particle size 50nm, 100nm, 200nm) is used to achieve different needs from coarse grinding to fine grinding without excessive damage to the plastic surface. Cubic boron nitride (cBN) powder (1-3μm) is suitable for applications with high hardness and wear resistance, but its dosage needs to be carefully controlled to prevent scratches. Ultrafine alumina (Al 2 O 3) (average particle size <0.5μm), suitable for grinding medium-hard materials and friendly to plastics; green silicon carbide powder (SiC) is only used in small quantities, mainly for quickly removing initial large defects. In addition, polyurethane elastomer microspheres are added to enhance the cushioning effect and reduce the pressure on the plastic surface; functional additives include zirconium oxide (ZrO 2 ), carbon nanotubes or graphene to improve toughness and conductivity; molybdenum disulfide (MoS 2 ) and hexagonal boron nitride (h-BN) as solid lubricants to reduce friction; self-healing microcapsules containing silicone oil or other lubricants to extend tool life; carbon black or metal oxides such as Fe 2 O 3 、TiO 2 Ensure the light-shielding effect after grinding; phosphate buffer adjusts the pH value; polyacrylic acid polymer is used as a dispersant to keep the abrasive particles evenly distributed. In order to better adapt to the plastic material, a small amount of polyethylene wax is added as an additional lubricant, as well as an appropriate amount of UV absorber to protect the plastic from UV radiation damage, and finally an antistatic agent to prevent static electricity from adsorbing dust and affecting the processing quality. The semi-finished products of the shading sheet after grinding under different conditions are tested to ensure that only products that meet the standards can continue to the next process. At the same time, the grinding machine with the shortest operation time and meeting the requirements is selected as the target machine. This not only improves production efficiency, but also reduces energy consumption and equipment wear. The semi-finished products of the shading sheet after punching are ground with the selected optimal parameters, which can effectively eliminate the gloss and make the product achieve the required optical performance, that is, good shading effect; By precisely controlling the composition of the specially made composite material and various parameters during the grinding process, refined management of the surface treatment of the shading sheet is achieved, which not only ensures the optical properties and mechanical strength of the product, but also improves production efficiency and resource utilization.

[0016] In the embodiment of the present invention, the S300 includes the following steps: S310: Use ultrasonic cleaning equipment to clean the finished shading sheet, and the operating frequency of the ultrasonic cleaning equipment is between 80KHz and 130K; Ultrasonic cleaning utilizes the cavitation effect, which is the phenomenon that tiny bubbles generated when ultrasonic waves propagate in liquids form and burst rapidly. The bursting of these bubbles can produce a strong local impact force on the surface of the object, effectively removing particles, grease and other contaminants attached to the surface. Compared with traditional cleaning methods, ultrasonic cleaning can more thoroughly clean hard-to-reach areas, such as small gaps, grooves, etc., to ensure that every corner of the finished shading sheet is fully cleaned. Operating in the high-frequency range of 80KHz to 130KHz, the ultrasonic cleaning process is relatively gentle, reducing the risk of physical damage to the surface of the finished shading sheet. This is because the cavitation effect at higher frequencies is less intense, but still strong enough to achieve efficient cleaning. The cleaned shading sheet has a higher degree of cleanliness, which helps to ensure that its optical properties are not affected by surface stains, thereby improving the quality and reliability of the final product. Ultrasonic cleaning can complete effective cleaning work without the use of chemical cleaning agents, reducing the use of chemicals and the environmental pollution and health risks they may bring.

[0017] In the embodiment of the present invention, the S500 includes the following steps: S510: Preparation before drying: perform a preliminary inspection on all shading sheets before drying to ensure that there are no obvious contaminants or defects on the surface; S520: Environmental preparation, set up a dedicated oven, and ensure that the cleanliness inside the oven meets ISO Class 3 or above standards; S530: Temperature control, setting the drying temperature in the oven to 50 degrees Celsius; S540: Humidity monitoring, a high-precision humidity sensor is installed in the oven to ensure that the relative humidity does not exceed 5%RH; S550: Airflow management, the oven is equipped with a controllable airflow system, and the air flow rate is controlled at 0.1-0.5m / s; S560: using a gradual temperature increase method to slowly transition the shading sheet from room temperature to a target temperature of 50 degrees Celsius; S570: The oven is equipped with an abnormal temperature alarm mechanism. Once the temperature is detected to be out of the set range, the alarm is triggered immediately; S580: Cooling and post-processing. After drying, the finished shading sheet in the oven is naturally cooled to near room temperature; Preliminary inspection before drying can timely detect and remove the shading sheets with obvious contaminants or defects on the surface, avoiding unnecessary energy waste and time costs, while ensuring that the products entering the subsequent processes have a high initial quality; A dedicated drying oven with a cleanliness level of ISO Class 3 or above, as well as strict management of humidity and airflow, provides an excellent drying environment for the shade sheets, which helps prevent the introduction of new contamination during the drying process and ensures that the surface of the shade sheets is not affected by moisture, maintaining its optical properties; Determine the appropriate drying temperature of 50 degrees Celsius and relative humidity not exceeding 5%RH, which can effectively remove moisture without affecting the material properties and ensure the stability and consistency of the finished shading sheet; Controlling the air velocity between 0.1-0.5m / s can promote uniform heat distribution, accelerate the evaporation process, and avoid the risk of shading sheet displacement or damage caused by excessive airflow; The gradual heating method is used to slowly transition the shading sheet to the target temperature, which can reduce the impact of thermal stress on the material and prevent deformation or other structural problems caused by rapid heating; The temperature abnormality alarm mechanism can immediately sound an alarm when temperature fluctuations occur, allowing operators to take quick measures to avoid possible batch losses and ensure the safety of the production process; After drying, let the shading sheet cool naturally to near room temperature, which helps to reduce the internal stress caused by rapid cooling, ensure the stability of the physical properties of the shading sheet, and extend its service life; Through a series of precise control measures, not only the quality and reliability of the shading sheet are improved, but also the production efficiency is optimized and the defective rate is reduced.

[0018] In the embodiment of the present invention, the S600 includes the following steps: S610: Initial air spraying, using HEPA-filtered high-pressure compressed air to spray the surface of the shading sheet to remove dust and larger particles; S620: Static electricity elimination, using an ion air gun to neutralize the surface charge of the shading sheet; S630: Secondary air injection, using high-pressure compressed air again for detailed spraying to ensure no residual dust; S640: Vacuum cleaning, for fine dust that is difficult to remove with air jets, a highly sensitive vacuum cleaning device is used to suck away the remaining fine particles; S650: Use non-contact laser scanner or optical microscope to perform final inspection on the surface of the shielding film; Using HEPA-filtered high-pressure compressed air for the initial air jet can effectively remove larger particle contaminants on the surface of the shading sheet. HEPA filtration ensures the purity of the jet air itself and prevents secondary contamination. This step can quickly remove most visible dust and impurities, laying the foundation for more detailed subsequent processing; The ion air gun is used to neutralize the surface charge of the shading sheet, eliminating the electrostatic attraction, thereby reducing the possibility of dust re-adsorption. Static elimination helps to improve the effectiveness of subsequent cleaning steps and ensure that fine dust will not re-attach to the surface due to static electricity; Use high-pressure compressed air to spray carefully again to further clean the tiny particles that may be missed or newly generated, ensuring that there is no residual dust on the surface of the shading sheet; Repeated air jetting process enhances the thoroughness of cleaning, especially suitable for products with extremely high optical performance requirements; For fine dust that is difficult to remove by air jet, a highly sensitive vacuum cleaner can accurately remove these remaining small particles to ensure the ultimate cleanliness of the surface. The application of vacuum cleaners complements the shortcomings of air jets. The final inspection of the mask surface using a non-contact laser scanner or optical microscope can accurately check and confirm whether the surface is completely dust-free and meets strict quality control standards; Ensuring the extreme cleanliness of the surface of the light shield can significantly improve the quality and reliability of the product. Through multi-step cleaning and final inspection, the yield is increased and the rework cost is reduced.

[0019] A high-precision microwave-polished optical shading sheet, the shading sheet is produced by the above-mentioned production method. The shading sheet manufactured by the above production method not only has excellent optical and mechanical properties, but also performs well in terms of product quality consistency, production process optimization, environmental protection and market adaptability.

[0020] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for producing a high-precision microwave-polished optical shading sheet, characterized in that: The steps include: S100: punching, selecting a shading sheet substrate, cleaning and pre-treating the surface of the shading sheet substrate, so that the outer surface of the shading sheet substrate forms a smooth first working surface, and punching and cutting the shading sheet substrate into a shape and holes of a predetermined diameter by using a precision mold and a punching device; S200: Grinding and matting: select a small amount of samples and use a high-precision grinder to conduct preliminary grinding tests to test the matting effect under the preliminary grinding test. Set the target grinding time and speed according to the sample test results, select a suitable special composite material to grind the surface of the shading sheet after punching to eliminate the gloss, so that the outer surface of the shading sheet substrate forms the second working surface of microwave grinding; S300: ultrasonic cleaning, using ultrasonic cleaning equipment to clean the second working surface of the light shielding sheet after the grinding process; S500: drying, drying the cleaned second working surface of the light shielding sheet; S600: Dust and static removal, using physical methods to remove dust particles and static charges on the second working surface of the shading sheet.

2. The method for producing a microwave-polished optical shading sheet according to claim 1, characterized in that: The S100 includes the following steps: S110: The shading sheet substrate is selected as an optical shading sheet with low reflectivity; S120: Surface cleaning and pretreatment of the shielding sheet substrate includes using an optical microscope with image analysis software to observe and measure the particle size on the surface of the shielding sheet substrate, using ultrasonic cleaning to remove dust and grease from the surface of the shielding sheet substrate, and using a drying device to dry the shielding sheet substrate so that the particle density on the surface of the shielding sheet substrate is ≤5 / cm² and the size of a single particle on the surface of the shielding sheet substrate is ≤<10μm; S130: The shading sheet substrate is fixed on a precision mold, and the precision mold includes a clamping component with a circular periphery. The center of the clamping component is provided with an aperture hole punch with a diameter of ≤0.2mm. The punching equipment is used to perform periphery punching and center punching operations on the shading sheet substrate to prepare a semi-finished shading sheet.

3. The method for producing a high-precision microwave-polished optical shading sheet according to claim 2, characterized in that: The S200 includes the following steps: S210: The specially prepared composite material used in the grinding and matting step includes the following proportions by weight percentage: modified epoxy resin accounts for 14% of the total amount, silicone rubber accounts for 6%, nano diamond powder (mixed with different particle sizes) accounts for 18%, cubic boron nitride (cBN) powder accounts for 8%, ultrafine alumina (Al2O3) accounts for 12%, green silicon carbide powder (SiC) accounts for 3%, polyurethane elastomer microspheres account for 5%, zirconium oxide (ZrO2) accounts for 3%, carbon nanotubes or graphene accounts for 2%, molybdenum disulfide (MoS2) and hexagonal boron nitride (h-BN) account for 4%, self-healing microcapsules account for 2%, carbon black or metal oxides account for 4%, phosphate buffer accounts for 2%, polyacrylic polymers account for 1%, polyethylene wax accounts for 2%, ultraviolet absorbers account for 1%, and antistatic agents account for 1%; S220: Select a number of semi-finished shading sheets and place them in a number of grinders respectively. The high-precision grinders are equipped with the special composite material described in step S210. The grinding time of the high-precision grinders is 10 minutes, 15 minutes, 20 minutes, 25 minutes, and 50 minutes respectively. The grinding speed of the high-precision grinders is 300 rpm, 400 rpm, 500 rpm, 600 rpm, and 1000 rpm respectively. S230: Detect the semi-finished shading sheets processed by the multiple high-precision grinders in step S220 respectively. If the semi-finished shading sheets in a certain high-precision grinder meet the detection requirements, select the high-precision grinder as the target grinder, and the operating parameters of the high-precision grinder are the target parameters; If multiple semi-finished parts of the shading sheet processed by multiple high-precision grinders meet the inspection requirements, the operating parameters in the high-precision grinder with the shortest operating time are selected as the target parameters; S260: placing the semi-finished shading sheet in a target grinding machine, and grinding the punched semi-finished shading sheet using target parameters to eliminate gloss, so as to obtain a finished shading sheet.

4. The method for producing a high-precision microwave-polished optical shading sheet according to claim 3, characterized in that: The S300 includes the following steps: S310: Use ultrasonic cleaning equipment to clean the finished shading sheet, and the operating frequency of the ultrasonic cleaning equipment is between 80KHz and 130K.

5. A method for producing a high-precision microwave-polished optical shading sheet according to any one of claims 1 to 4, characterized in that: The S500 includes the following steps: S510: Preparation before drying: perform a preliminary inspection on all shading sheets before drying to ensure that there are no obvious contaminants or defects on the surface; S520: Environmental preparation, set up a dedicated oven, and ensure that the cleanliness inside the oven meets ISO Class 3 or above standards; S530: Temperature control, setting the drying temperature in the oven to 50 degrees Celsius; S540: Humidity monitoring, a high-precision humidity sensor is installed in the oven to ensure that the relative humidity does not exceed 5%RH; S550: Airflow management, the oven is equipped with a controllable airflow system, and the air flow rate is controlled at 0.1-0.5m / s; S560: using a gradual temperature increase method to slowly transition the shading sheet from room temperature to a target temperature of 50 degrees Celsius; S570: The oven is equipped with an abnormal temperature alarm mechanism. Once the temperature is detected to be out of the set range, the alarm is triggered immediately; S580: Cooling and post-processing. After drying, the finished shading sheet in the oven is naturally cooled to near room temperature.

6. The method for producing a high-precision microwave-polished optical shading sheet according to claim 5, characterized in that: The S600 includes the following steps: S610: Initial air spraying, using HEPA-filtered high-pressure compressed air to spray the surface of the shading sheet to remove dust and larger particles; S620: Static electricity elimination, using an ion air gun to neutralize the surface charge of the shading sheet; S630: Secondary air injection, using high-pressure compressed air again for detailed spraying to ensure no residual dust; S640: Vacuum cleaning, for fine dust that is difficult to remove with air jets, a highly sensitive vacuum cleaning device is used to suck away the remaining fine particles; S650: Perform final inspection of the shading sheet surface using a non-contact laser scanner or optical microscope.

7. A high-precision microwave polished optical shading sheet, characterized in that: The production of the microwave-polished optical shading sheet adopts the production method described in any one of claims 1-6.

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