Lens coating process capable of improving real shot stray light

Abstract

The invention belongs to the technical field of lens coating, and discloses a lens coating process capable of improving real shot stray light, which comprises the following steps: S1, basic pretreatment; s2, substrate coating treatment; s3, processing a reflection weakening layer; s4, multi-layer interference coating treatment; s5, processing an anti-reflection film; s6, protective coating treatment; and S7, detecting and testing the quality of the coating film. The reflection rate of the surface of the lens is reduced, multiple times of reflection and scattering of light in the lens are reduced, so that stray light, ghosting, light spots or glare is avoided, and particularly, in the design of the multi-layer interference coating, by accurately controlling the deposition sequence and thickness of magnesium fluoride, titanium dioxide and silicon oxide, the reflection rate of the surface of the lens is improved. According to the invention, accurate regulation and control of light with a specific wavelength are realized, the light transmittance and imaging definition of the lens are further improved, in addition, the reflectivity of the surface of the lens is further reduced through anti-reflection film processing, more light can penetrate through the lens, and a powerful guarantee is provided for high-quality imaging.

Description

Technical Field

[0001] The invention belongs to the technical field of lens coating, and in particular relates to a lens coating process capable of improving stray light in actual shooting. Background Art

[0002] Although the lens coating process can greatly improve light transmittance and reduce reflection, stray light (also known as ghosting, flare or glare) may still occur in some specific shooting environments. This phenomenon usually occurs when a strong light source (such as sunlight, lamplight or reflected light) directly shines on the lens, resulting in multiple reflections or scattering of light in the lens, thus producing undesirable flares or blurred halos in the image.

[0003] Even with the use of coating technology, the lens surface will still reflect a portion of the incident light, especially on the optical surfaces of the lens (such as lenses and apertures). These reflected lights may be reflected multiple times inside the lens and cause stray light. Although modern lenses often use multi-layer coating (MC), the quality of the coating process, the number and distribution of film layers may affect the reflection suppression effect. If the coating process is not sufficient or the coating material used is not ideal, the stray light problem may be more obvious. When a strong light source (such as the sun, strong lights, reflected light) directly shines on the lens, the light enters the lens and reflects multiple times, which may cause the reflected light to form a ring or halo effect inside the lens. This is also a common cause of stray light. The aperture design of the lens may also affect the performance of stray light. The shape and number of aperture blades of some lenses are asymmetrical, which will cause obvious light spots or starbursts under strong light sources. Summary of the invention

[0004] The object of the present invention is to provide a lens coating process that can improve stray light in real shooting, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a lens coating process capable of improving stray light in real shooting, comprising the following steps:

[0006] S1: basic pretreatment;

[0007] S2: base coating treatment;

[0008] S3: reflection reduction layer processing;

[0009] S4: multi-layer interference coating treatment;

[0010] S5: anti-reflection film treatment;

[0011] S6: Protective coating treatment;

[0012] S7: coating quality inspection and testing;

[0013] The basic pretreatment includes ultrasonic cleaning and drying treatment, the reflection attenuation layer treatment includes sputtering deposition and heat treatment, the multilayer interference coating treatment includes multilayer film deposition and heat treatment and cooling, the anti-reflection film treatment includes sputtering deposition and cooling and stabilization, the protective coating treatment includes coating and curing and heating, and the coating quality inspection and testing includes transmittance testing and reflected light testing.

[0014] As a further technical solution of the present invention, the solvent ratio required for ultrasonic cleaning includes 90% deionized water and 10% isopropyl alcohol, including using ultrasonic cleaning equipment, cleaning at a frequency of 40kHz, the cleaning time is 15-20 minutes, the cleaning temperature is 40°C-50°C, and deionized water is used to remove large particles of dust on the lens, and then isopropyl alcohol is used to remove grease and stains. The drying process includes gently blowing dry the lens surface with clean compressed air to avoid water stains and oil film residues.

[0015] As a further technical solution of the present invention, the materials required for the base coating treatment include a silicon dioxide (SiO2) coating, whose material composition includes 90% silicon dioxide (SiO2) and 10% xylene, and the coating thickness is 50nm-100nm. The sputtering deposition includes using magnetron sputtering technology to evaporate and deposit SiO2 material on the surface of the lens to form a uniform coating, and using nitrogen as an inert gas to accelerate silicon dioxide particles to the lens surface through the sputtering process, and controlling the deposition rate to 1.0-1.5nm / s to ensure the uniformity of the coating. The heat treatment includes heating the lens to 200°C and performing heat treatment for 30 minutes to help cure the coating and ensure its firm adhesion.

[0016] As a further technical solution of the present invention, the material of the reflection attenuation layer is a composite of titanium dioxide (TiO2) and aluminum oxide (Al2O3), with a composition ratio of 70% titanium dioxide (TiO2) and 30% aluminum oxide (Al2O3), and a coating thickness of 30nm-50nm. The sputtering deposition includes using a reactive sputtering method to deposit a TiO2 and Al2O3 composite film, selecting appropriate power and atmosphere to adjust the deposition rate, and using a mixed gas of argon and oxygen for sputtering deposition, controlling the gas ratio to 70% argon and 30% oxygen. The heat treatment includes heating each layer of the coating at 200°C-250°C for 30 minutes after the deposition is completed to promote cross-linking of the coating and improve its optical properties.

[0017] As a further technical solution of the present invention, the material composition of the multiple interference films in the multilayer interference coating is 25% magnesium fluoride (MgF2), 25% titanium dioxide (TiO2), and 50% silicon oxide (SiO2), and the thickness of each time is 10nm-30nm, and the number of layers is 5-7 layers. The multilayer film deposition includes the combination of magnetron sputtering and electron beam evaporation to alternately deposit magnesium fluoride, titanium dioxide, and silicon oxide, and the deposition sequence is first depositing a layer of MgF2 as a low refractive index film, and then depositing TiO2 (high refractive index film) and SiO2 (medium refractive index film). The thickness of each film layer is determined by optical design calculations, usually 10nm-30nm. The heat treatment and cooling include heat treatment at 250°C for 30 minutes after each layer of the coating is deposited to improve the stability and durability of the film layer.

[0018] As a further technical solution of the present invention, the material composition of the anti-reflection film treatment is 50% magnesium fluoride (MgF2) and 50% titanium dioxide (TiO2), and the thickness of each layer of the coating is 30nm-50nm. The sputtering deposition includes using sputtering technology to alternately deposit magnesium fluoride and titanium dioxide on the surface of the lens to form a multi-layer anti-reflection film. Argon and oxygen are used in the gas environment, and the argon concentration is maintained at about 70%, and the oxygen concentration is maintained at about 30%. The cooling and temperature include that after the coating is completed, the lens should be slowly cooled to room temperature to ensure the stability and uniformity of the film layer.

[0019] As a further technical solution of the present invention, the material composition of the protective coating is a composite coating of silicon fluoride (SiF2) and polytetrafluoroethylene (PTFE), and the composition ratio is 60% silicon fluoride (SiF2) and 40% polytetrafluoroethylene (PTFE), and the coating thickness is 80nm-100nm. The coating method includes using a spin coating method or a spray coating method to evenly coat the silicon fluoride coating on the surface of the lens. Silicon fluoride provides good hydrophobicity and anti-fouling effects, while PTFE enhances wear resistance. Precision-controlled spraying equipment is used to ensure uniform distribution of the coating. The curing and heating include curing treatment at a temperature of 60°C-80°C for 30 minutes to ensure adhesion and durability of the coating.

[0020] As a further technical solution of the present invention, the transmittance test includes using a spectrophotometer to measure the transmittance of the coated lens to ensure that the reflectivity is lower than 0.5% and the transmittance should be greater than 98%. The reflected light test includes using a laser light source to irradiate the surface of the lens after coating to check whether there is obvious ghosting or glare, ensuring that reflection and stray light phenomena are effectively suppressed.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention effectively reduces the reflectivity of the lens surface and the multiple reflections and scattering of light inside the lens through a series of fine processing steps, such as basic pretreatment, base coating treatment, reflection reduction layer treatment and multi-layer interference coating treatment, thereby avoiding the generation of stray light, ghosting, light spots or glare. In particular, in the design of the multi-layer interference coating, by precisely controlling the deposition sequence and thickness of magnesium fluoride, titanium dioxide and silicon oxide, precise regulation of light of a specific wavelength is achieved, further improving the light transmittance and imaging clarity of the lens. In addition, the anti-reflection film treatment further reduces the reflectivity of the lens surface, ensuring that more light can penetrate the lens, providing a strong guarantee for high-quality imaging.

[0023] 2. The present invention provides a strong and durable protective layer for the lens by adopting a composite material of silicon fluoride and polytetrafluoroethylene, which effectively resists erosion and wear of the external environment. The hydrophobicity and anti-fouling effect of silicon fluoride enable the lens to remain clean and clear even in harsh environments, while the wear resistance of polytetrafluoroethylene greatly extends the service life of the lens. At the same time, the present invention also focuses on the detection and testing of the coating quality, and accurately evaluates the quality of the coated lens through means such as transmittance test and reflected light test to ensure that each lens can meet high standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall system block diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the basic pretreatment process of the present invention;

[0026] Figure 3 It is a schematic diagram of the process of processing the reflection reducing layer of the present invention;

[0027] Figure 4 It is a schematic diagram of the process of multilayer interference coating processing of the present invention;

[0028] Figure 5 It is a schematic diagram of the process of anti-reflection film processing of the present invention;

[0029] Figure 6 It is a schematic diagram of the process of protective coating treatment of the present invention;

[0030] Figure 7 It is a schematic diagram of the process of coating quality detection and testing of the present invention. DETAILED DESCRIPTION

[0031] 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.

[0032] like Figures 1 to 7 As shown, in an embodiment of the present invention, a lens coating process for improving stray light in real shooting is characterized by comprising the following steps:

[0033] S1: basic pretreatment;

[0034] S2: base coating treatment;

[0035] S3: reflection reduction layer processing;

[0036] S4: multi-layer interference coating treatment;

[0037] S5: anti-reflection film treatment;

[0038] S6: Protective coating treatment;

[0039] S7: coating quality inspection and testing;

[0040] Basic pretreatment includes ultrasonic cleaning and drying, reflection attenuation layer treatment includes sputtering deposition and heat treatment, multi-layer interference coating treatment includes multi-layer film deposition and heat treatment and cooling, anti-reflection film treatment includes sputtering deposition and cooling and stabilization, protective coating treatment includes coating and curing and heating, coating quality inspection and testing includes transmittance test and reflected light test.

[0041] The optical performance of the lens is improved through a series of delicate processing steps. Starting from the basic pre-treatment, through the base coating, reflection reduction layer, multi-layer interference coating, anti-reflection film and protective coating, each layer undergoes specific deposition, heat treatment or cooling processes to ensure the quality and effect of the coating. Finally, through the coating quality inspection and testing, including the test of transmittance and reflected light, it is ensured that the lens coating can meet the high requirements of practical applications.

[0042] like Figure 2 As shown, the solvent ratio required for ultrasonic cleaning includes 90% deionized water and 10% isopropyl alcohol, including using ultrasonic cleaning equipment, cleaning at a frequency of 40kHz, a cleaning time of 15-20 minutes, a cleaning temperature of 40℃-50℃, and using deionized water to remove large particles of dust on the lens, and then using isopropyl alcohol to remove grease and stains. The drying process includes gently blowing dry the lens surface with clean compressed air to avoid water stains and oil film residues.

[0043] Using a specific ratio of deionized water and isopropyl alcohol (90%:10%), combined with 40kHz ultrasonic equipment, it can effectively clean for 15-20 minutes at an appropriate temperature of 40℃-50℃. First, deionized water is used to remove large particles of dust, and then isopropyl alcohol is used to deeply remove grease and stains. The subsequent drying process uses clean compressed air to gently blow dry to ensure that there is no residual water stains and oil film on the lens surface, laying a solid foundation for the subsequent coating process, ensuring the quality and performance of the lens coating, and improving the cleanliness and coating adhesion of the lens.

[0044] like Figure 3 As shown, the materials required for the base coating treatment include a silicon dioxide (SiO2) coating, whose material composition includes 90% silicon dioxide (SiO2) and 10% xylene, and the coating thickness is 50nm-100nm. The sputtering deposition includes using magnetron sputtering technology to evaporate and deposit the SiO2 material on the surface of the lens to form a uniform coating, and using nitrogen as an inert gas to accelerate the silicon dioxide particles to the lens surface through the sputtering process, and controlling the deposition rate to 1.0-1.5nm / s to ensure the uniformity of the coating. The heat treatment includes heating the lens to 200°C and performing heat treatment for 30 minutes to help cure the coating and ensure its firm adhesion.

[0045] The base coating process is a key step in the lens coating process. Silicon dioxide (SiO2) is used as the main material, and xylene is used to optimize the coating performance. Through magnetron sputtering technology, SiO2 is evenly deposited on the lens surface in a nitrogen environment to form a 50nm-100nm thick coating. The deposition rate is strictly controlled during the deposition process to ensure that the coating is uniform and defect-free. In the subsequent heat treatment step, the lens is heated to 200°C and maintained for 30 minutes to effectively cure the coating, enhance its adhesion to the lens, and provide a solid foundation for the subsequent coating layer, thereby improving the overall optical performance and durability of the lens.

[0046] like Figure 4 As shown, the material of the reflection reduction layer is a composite of titanium dioxide (TiO2) and aluminum oxide (Al2O2), with a composition ratio of 70% titanium dioxide (TiO2) and 30% aluminum oxide (Al2O3), and a coating thickness of 30nm-50nm. The sputtering deposition includes using a reactive sputtering method to deposit TiO2 and Al2O3 composite films, selecting appropriate power and atmosphere to adjust the deposition rate, and using a mixed gas of argon and oxygen for sputtering deposition, controlling the gas ratio to 70% argon and 30% oxygen. The heat treatment includes heating each layer of the coating at 200°C-250°C for 30 minutes after the deposition is completed to promote cross-linking of the coating and improve its optical properties.

[0047] The reflection reducing layer adopts a composite of titanium dioxide (TiO2) and aluminum oxide (Al2O3). Through precise proportion (70%:30%) and reactive sputtering, a 30nm-50nm thick coating is evenly deposited in a mixed atmosphere of argon and oxygen (70%:30%). During the deposition process, the deposition rate is precisely controlled by adjusting the power and atmosphere to ensure the quality of the coating. After each layer is deposited, a heat treatment at 200℃-250℃ is performed for 30 minutes to promote cross-linking of the coating, significantly improve its optical properties, effectively reduce reflected light, and improve the transmittance and imaging quality of the lens. It is a key link in the lens coating process.

[0048] like Figure 5 As shown, the material composition of the multiple interference films in the multilayer interference coating is 25% magnesium fluoride (MgF2), 25% titanium dioxide (TiO2), and 50% silicon oxide (SiO2), and the thickness of each time is 10nm-30nm, and the number of layers is 5-7. The multilayer film deposition includes the combination of magnetron sputtering and electron beam evaporation to alternately deposit magnesium fluoride, titanium dioxide, and silicon oxide, and the deposition sequence is first depositing a layer of MgF2 as a low refractive index film, and then depositing TiO2 (high refractive index film) and SiO2 (medium refractive index film). The thickness of each film layer is determined by optical design calculations, usually 10nm-30nm. The heat treatment and cooling include heat treatment at 250°C for 30 minutes after each layer of coating is deposited to improve the stability and durability of the film layer.

[0049] The multilayer interference coating is made by carefully designing a combination of magnesium fluoride, titanium dioxide and silicon oxide materials, combining magnetron sputtering and electron beam evaporation to alternately deposit 5-7 layers of thin films. The thickness of each layer is precisely controlled between 10-30 nanometers, achieving excellent optical properties. The first layer of MgF2 starts with a low refractive index, alternating with high refractive index TiO2 and medium refractive index SiO2. The thickness is optimized by optical design, effectively interfering to enhance or weaken specific wavelengths of light. The heat treatment after deposition further improves the stability and durability of the film layer.

[0050] like Figure 6 As shown, the material composition of the anti-reflection film treatment is 50% magnesium fluoride (MgF2) and 50% titanium dioxide (TiO2), and the thickness of each layer of the coating is 30nm-50nm. The sputtering deposition includes using sputtering technology to alternately deposit magnesium fluoride and titanium dioxide on the surface of the lens to form a multi-layer anti-reflection film. Argon and oxygen are used in the gas environment, and the argon concentration is maintained at about 70%, and the oxygen concentration is maintained at about 30%. Cooling and temperature include that after the coating is completed, the lens should be slowly cooled to room temperature to ensure the stability and uniformity of the film layer.

[0051] The anti-reflective film treatment uses a material ratio of 50% magnesium fluoride and 50% titanium dioxide. Through sputtering technology, these two materials are alternately deposited on the lens surface with a thickness of 30-50 nanometers to form a multi-layer structure. During the deposition process, a mixed gas environment of argon and oxygen is used, in which argon accounts for about 70% and oxygen accounts for about 30%, to optimize the deposition effect. After the coating is completed, the lens needs to be slowly cooled to room temperature to ensure the stability and uniformity of the film layer. This anti-reflective film can significantly reduce the reflected light on the lens surface, improve the transmittance, and make the image clearer.

[0052] like Figure 7 As shown, the material composition of the protective coating is a composite coating of silicon fluoride (SiF2) and polytetrafluoroethylene (PTFE), and the composition ratio is 60% of silicon fluoride (SiF2) and 40% of polytetrafluoroethylene (PTFE). The coating thickness is 80nm-100nm. The coating method includes using a spin coating method or a spray coating method to evenly coat the silicon fluoride coating on the surface of the lens. Silicon fluoride provides good hydrophobicity and anti-fouling effects, while PTFE enhances wear resistance. Precision-controlled spraying equipment is used to ensure uniform distribution of the coating. Curing and heating include curing treatment at a temperature of 60°C-80°C for 30 minutes to ensure adhesion and durability of the coating.

[0053] The protective coating is made of a composite material of silicon fluoride and polytetrafluoroethylene, with a ratio of 60% silicon fluoride and 40% polytetrafluoroethylene. It is evenly applied to the lens surface by spin coating or spraying to form a coating 80-100 nanometers thick. Silicon fluoride gives the coating excellent hydrophobicity and anti-fouling ability, while polytetrafluoroethylene enhances the coating's wear resistance. Precision-controlled spraying equipment ensures uniform distribution of the coating, and curing treatment at 60-80°C further enhances the coating's adhesion and durability. The protective coating effectively extends the service life of the lens, reduces the frequency of cleaning, and maintains lens clarity and performance.

[0054] like Figure 7 As shown, the transmittance test includes using a spectrophotometer to measure the transmittance of the coated lens to ensure that the reflectivity is less than 0.5% and the transmittance should be greater than 98%. The reflected light test includes using a laser light source to illuminate the surface of the coated lens to check whether there is obvious ghosting or glare, ensuring that reflection and stray light are effectively suppressed.

[0055] The transmittance of the coated lens is accurately measured by a spectrophotometer to ensure that it meets the high transmittance standard of more than 98%. At the same time, the reflectivity is strictly controlled below 0.5% to ensure image clarity. The reflected light test uses a laser light source to illuminate the coated lens to carefully check whether there are adverse effects such as ghosting or glare, ensuring that reflections and stray light are effectively suppressed, thereby greatly improving the imaging quality and visual effects of the lens. These tests provide a scientific basis for the control and optimization of the quality of optical lens coatings.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lens coating process for improving stray light in real-life photography, characterized in that: The following steps are involved: S1: basic pretreatment; S2: base coating treatment; S3: reflection reduction layer processing; S4: multi-layer interference coating treatment; S5: anti-reflection film treatment; S6: Protective coating treatment; S7: coating quality inspection and testing; The basic pretreatment includes ultrasonic cleaning and drying treatment, the reflection attenuation layer treatment includes sputtering deposition and heat treatment, the multilayer interference coating treatment includes multilayer film deposition and heat treatment and cooling, the anti-reflection film treatment includes sputtering deposition and cooling and stabilization, the protective coating treatment includes coating and curing and heating, and the coating quality inspection and testing includes transmittance testing and reflected light testing.

2. The lens coating process for improving stray light in real shooting according to claim 1, characterized in that: The solvent ratio required for the ultrasonic cleaning includes 90% deionized water and 10% isopropyl alcohol, including using ultrasonic cleaning equipment, cleaning at a frequency of 40kHz, a cleaning time of 15-20 minutes, a cleaning temperature of 40°C-50°C, and using deionized water to remove large particles of dust on the lens, and then using isopropyl alcohol to remove grease and stains. The drying process includes gently blowing dry the lens surface with clean compressed air to avoid water stains and oil film residues.

3. The lens coating process for improving stray light in real shooting according to claim 1, characterized in that: The materials required for the base coating treatment include a silicon dioxide (SiO2) coating, whose material composition includes 90% silicon dioxide (SiO2) and 10% xylene, and the coating thickness is 50nm-100nm. The sputtering deposition includes using magnetron sputtering technology to evaporate and deposit SiO2 material on the surface of the lens to form a uniform coating, and using nitrogen as an inert gas to accelerate silicon dioxide particles to the lens surface through the sputtering process, and controlling the deposition rate to 1.0-1.5nm / s to ensure the uniformity of the coating. The heat treatment includes heating the lens to 200°C and performing heat treatment for 30 minutes to help solidify the coating and ensure its firm adhesion.

4. The lens coating process for improving stray light in real shooting according to claim 1, characterized in that: The material of the reflection reduction layer is a composite of titanium dioxide (TiO2) and aluminum oxide (Al2O3), with a composition ratio of 70% titanium dioxide (TiO2) and 30% aluminum oxide (Al2O3), and a coating thickness of 30nm-50nm. The sputtering deposition includes using a reactive sputtering method to deposit a TiO2 and Al2O3 composite film, selecting appropriate power and atmosphere to adjust the deposition rate, and using a mixed gas of argon and oxygen for sputtering deposition, with a controlled gas ratio of 70% argon and 30% oxygen. The heat treatment includes heating each layer of the coating at 200°C-250°C for 30 minutes after the deposition is completed to promote cross-linking of the coating and improve its optical properties.

5. The lens coating process for improving stray light in real shooting according to claim 1, characterized in that: The material composition of the multiple interference films in the multi-layer interference coating is 25% magnesium fluoride (MgF2), 25% titanium dioxide (TiO2), and 50% silicon oxide (SiO2), and the thickness of each time is 10nm-30nm, and the number of layers is 5-7. The multi-layer film deposition includes the combination of magnetron sputtering and electron beam evaporation to alternately deposit magnesium fluoride, titanium dioxide, and silicon oxide, and the deposition sequence is first depositing a layer of MgF2 as a low refractive index film, and then depositing TiO2 (high refractive index film) and SiO2 (medium refractive index film). The thickness of each film layer is determined by optical design calculations and is usually 10nm-30nm. The heat treatment and cooling include performing a heat treatment at 250°C for 30 minutes after each layer of the coating is deposited to improve the stability and durability of the film layer.

6. The lens coating process for improving stray light in real shooting according to claim 1, characterized in that: The material composition of the anti-reflection film treatment is 50% magnesium fluoride (MgF2) and 50% titanium dioxide (TiO2), and the thickness of each layer of the coating is 30nm-50nm. The sputtering deposition includes using sputtering technology to alternately deposit magnesium fluoride and titanium dioxide on the surface of the lens to form a multi-layer anti-reflection film. Argon and oxygen are used in the gas environment, and the argon concentration is maintained at about 70%, and the oxygen concentration is maintained at about 30%. The cooling and temperature include that after the coating is completed, the lens should be slowly cooled to room temperature to ensure the stability and uniformity of the film layer.

7. The lens coating process for improving stray light in real shooting according to claim 1, characterized in that: The material composition of the protective coating is a composite coating of silicon fluoride (SiF2) and polytetrafluoroethylene (PTFE), and the composition ratio is 60% of silicon fluoride (SiF2) and 40% of polytetrafluoroethylene (PTFE). The coating thickness is 80nm-100nm. The coating method includes using a spin coating method or a spray coating method to evenly coat the silicon fluoride coating on the surface of the lens. Silicon fluoride provides good hydrophobicity and anti-fouling effects, while PTFE enhances wear resistance. Precision-controlled spraying equipment is used to ensure uniform distribution of the coating. The curing and heating include curing treatment at a temperature of 60°C-80°C for 30 minutes to ensure adhesion and durability of the coating.

8. The lens coating process for improving stray light in real shooting according to claim 1, characterized in that: The transmittance test includes using a spectrophotometer to measure the transmittance of the coated lens to ensure that the reflectivity is less than 0.5% and the transmittance should be greater than 98%. The reflected light test includes using a laser light source to irradiate the surface of the coated lens to check whether there is obvious ghosting or glare, ensuring that reflection and stray light are effectively suppressed.

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