Corrosion-resistant optical lens and preparation method thereof, lens protection film and optical spherical cover

Abstract

The invention discloses a corrosion-resistant optical lens and a preparation method thereof, a lens protection film and an optical spherical cover, and the preparation method comprises the steps: providing a substrate; cutting, polishing and cleaning the base plate to obtain a substrate layer; coating the surface of the substrate layer with an anti-reflection hardening liquid and curing the anti-reflection hardening liquid to obtain a hardened anti-reflection connecting layer; the hardened anti-reflection connecting layer is coated with a nanometer super-hydrophilic solution and cured, and the nanometer super-hydrophilic protective layer is prepared. The hardened anti-reflection connecting layer and the nanometer super-hydrophilic protective layer are coated on the substrate layer, so that the film layer structure on the substrate layer is firmly connected, the friction resistance is improved, meanwhile, a water film is formed on the nanometer super-hydrophilic protective layer in the using process, corrosive substances can be isolated, corrosive acid and alkali liquor, organic pesticide and emulsion can be delayed from invading the substrate, and the service life of the substrate is prolonged. Therefore, the substrate layer is protected, the use safety and chemical performance of the optical lens are improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and in particular to a corrosion-resistant optical lens and a preparation method thereof, a lens protective film, and an optical ball cover. Background Art

[0002] Optical lenses are one of the essential components of various optical devices. Optical lenses can be used as lenses for video cameras and digital cameras, or as protective covers for radars and scanning probes. They can play different roles depending on the usage scenario. For example, in modern agriculture, mechanized equipment has replaced most of the manual labor, and drones working in farmland are equipped with cameras or radar components, which collect real-time information for monitoring and supervision.

[0003] However, existing optical lenses are all made of plastic, which has certain water absorption and air permeability, and is easy to react with organic matter. During use, if it is contaminated with corrosive substances, such as pesticides, it is easy to cause discoloration, deformation, deterioration, poor light transmittance and other problems, affecting the optical performance and service life of the lens. At present, there is no good solution for the chemical corrosion resistance of plastic optical devices, especially pesticide corrosion.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a corrosion-resistant optical lens and a preparation method thereof, a lens protective film, and an optical ball cover, aiming to solve the problems of insufficient corrosion resistance, poor light transmission during use, and short service life of existing optical lenses.

[0006] The technical solution of the present invention is as follows:

[0007] A method for preparing a corrosion-resistant optical lens, comprising:

[0008] providing a substrate;

[0009] Cutting, polishing and cleaning the substrate to obtain a substrate layer;

[0010] Coating an anti-reflection hardening liquid on the surface of the substrate layer and curing the liquid to obtain a hardened anti-reflection connecting layer;

[0011] A nanometer super-hydrophilic solution is coated on the hardened anti-reflection connecting layer and solidified to obtain a nanometer super-hydrophilic protective layer.

[0012] The method for preparing the corrosion-resistant optical lens, wherein the step of coating the surface of the substrate layer with an anti-reflection hardening liquid and curing the liquid to obtain a hardened anti-reflection connecting layer specifically comprises:

[0013] Dissolving a silicon oxide-based compound in an isopropyl ketone solvent to prepare an anti-reflection hardening solution;

[0014] The substrate layer is immersed in the anti-reflection hardening liquid for 10-60 seconds, or the anti-reflection hardening liquid is coated on the substrate layer by a spray coating device, and then the curing temperature is set to 70-90° C. and the curing time is 15-60 minutes to obtain a hardened anti-reflection connecting layer;

[0015] Wherein, the refractive index of the silicon oxide-based compound is 1.4-1.5.

[0016] The method for preparing the corrosion-resistant optical lens, wherein the silicon oxide-based compound is silane coupling agent KH560 or silane coupling agent KH550.

[0017] The method for preparing the corrosion-resistant optical lens, wherein the step of coating the nano super-hydrophilic solution on the hardened anti-reflection connecting layer and curing the nano super-hydrophilic protective layer specifically comprises:

[0018] Putting the substrate layer coated with the hardened anti-reflection connecting layer into a vacuum plasma cleaning machine for cleaning, and performing plasma activation on the surface of the hardened anti-reflection connecting layer;

[0019] The super-hydrophilic solution is coated on the activated hardened anti-reflection connecting layer, and then the curing temperature is set to 70-90° C. and cured for 10-60 minutes to obtain a nano super-hydrophilic protective layer.

[0020] The method for preparing the corrosion-resistant optical lens, wherein the step of preparing the superphilic solution comprises:

[0021] Nano-modified silica particles, silicone resin binder and ethanol were measured in a volume ratio of 70%, 20% and 10% respectively;

[0022] The nano-modified silica particles are mixed with the ethanol and dispersed by ultrasound to obtain an intermediate mixture; the silicone resin binder is added to the intermediate mixture and stirred evenly to obtain a superphilic aqueous solution.

[0023] The method for preparing the corrosion-resistant optical lens, wherein the particle size of the nano-modified silica particles is 10-100 nanometers; and / or the contact angle of the nano-super-hydrophilic protective layer is less than 5°.

[0024] The method for preparing the corrosion-resistant optical lens, wherein the superphilic solution is coated on the activated hardened anti-reflection connecting layer by spin coating or spray coating.

[0025] The present application also discloses a corrosion-resistant optical lens, which is prepared by any of the corrosion-resistant optical lens preparation methods described above; wherein the optical lens includes a substrate layer, a hardened anti-reflection connecting layer and a nano-super hydrophilic protective layer stacked in sequence.

[0026] The present application also discloses a lens protective film for the corrosion-resistant optical lens as described above; wherein the lens protective film comprises a hardened anti-reflection connecting layer and a nano-super-hydrophilic protective layer which are stacked.

[0027] The present application also discloses an optical ball cover, which includes the corrosion-resistant optical lens as described above.

[0028] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0029] The optical lens disclosed in the present invention forms a substrate layer by cutting a substrate, and the substrate layer can be made into various shapes such as elliptical and square according to the manufacturing requirements of the optical spherical cover. After the substrate layer is made, an anti-reflection hardening liquid is coated on the surface of the substrate layer and solidified to form a hardened anti-reflection connecting layer, which can not only enhance the structural strength of the substrate layer, but also increase the light transmittance, reduce the light reflection on the surface of the substrate layer, and increase the light flux, so that the optical spherical cover can collect clearer image information.

[0030] The present invention increases adhesion by hardening the anti-reflection connecting layer, and then continues to coat the nano super-hydrophilic solution on the hardened anti-reflection connecting layer to form a nano super-hydrophilic protective layer. The hydrophilicity of the hydrophilic film layer can be used to adsorb water vapor in the air on the surface of the film layer to form a uniform water film. In other words, a layer of water film is formed on the surface of the optical lens during the use of the optical ball cover, thereby isolating sewage and dirt and keeping the lens surface clean. It is important to utilize the three-layer structure of the water film, the nano super-hydrophilic protective layer, and the hardened anti-reflection connecting layer to protect the substrate layer, avoid the problem of corrosion that is easy to occur when used in the agricultural and chemical industries, and extend the effective service life of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 The present invention is a flowchart of a method for preparing a corrosion-resistant optical lens;

[0033] Figure 2This is a diagram showing the effect of a high-concentration oily substance corrosion test on an uncoated substrate in one embodiment of the present invention;

[0034] Figure 3 This is a rendering of a corrosion-resistant optical lens in one embodiment of the present invention subjected to a high-concentration oily substance corrosion test;

[0035] Figure 4 This is a diagram showing the effect of a low-concentration emulsified substance corrosion test on an uncoated substrate in one embodiment of the present invention;

[0036] Figure 5 This is a rendering of a corrosion test of a corrosion-resistant optical lens in one embodiment of the present invention on a low-concentration emulsified substance;

[0037] Figure 6 This is a rendering of a pesticide immersion test of a corrosion-resistant laser radar cover in one embodiment of the present invention;

[0038] Figure 7 This is a rendering of another angle of the pesticide immersion test of the corrosion-resistant laser radar cover in one embodiment of the present invention;

[0039] Figure 8 This is a rendering of a pesticide immersion test of an uncoated laser radar cover in one embodiment of the present invention;

[0040] Fig. 9 This is a rendering of a pesticide immersion test of an uncoated laser radar cover in one embodiment of the present invention;

[0041] Fig.10 It is a schematic diagram of the structure of the corrosion-resistant optical lens in the present invention.

[0042] Among them, 10, substrate layer; 20, hardened anti-reflection connecting layer; 30, nano super-hydrophilic protective layer; 40, water film. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0044] The optical lens disclosed in this application can be used in optical equipment including but not limited to those used in agriculture, outdoor exploration, chemical industry, logistics industry, etc. In some use environments, the optical lens is inevitably exposed to dirt or sewage in the air, and some corrosive substances will damage the lens. For example, when using a drone to spread pesticides, the camera on the drone will be stained with the scattered pesticides, which may cause the optical lens of the lens to be corroded.

[0045] See also Figure 1 and Figure 6 In one embodiment of the present invention, a method for preparing a corrosion-resistant optical lens is disclosed, which comprises:

[0046] S100, providing a substrate.

[0047] The optical lens in this embodiment is used at the outermost side of the optical lens, and can be used as a protective lens or a lighting lens. It needs to have good light transmittance, high surface cleanliness requirements, and good structural strength to reduce the risk of collision damage. Specifically, the substrate of the optical lens can be made of glass or plastic, and plastic has the advantages of light weight, good toughness, and high safety. Therefore, this embodiment is preferably manufactured using a plastic substrate.

[0048] Specifically, the substrate in this embodiment is any one of a polycarbonate plate, an acrylic plate, and a nylon plate. The substrate made of plastic material has the characteristics of low cost, good light transmittance, smooth surface, and easy coating. It is used in this embodiment to meet the mechanical strength requirements of the optical lens, and is also convenient for the subsequent process of coating the anti-reflection hardening liquid, increasing the connection strength, so as to support the optical lens with high structural strength and facilitate use.

[0049] S200, cutting, polishing and cleaning the substrate to obtain a base layer 10.

[0050] According to the manufacturing requirements, the shape of the optical lens can be pre-modeled through 3D modeling software to adapt to the housing of the optical device or other optical elements, and then the substrate is cut according to the model and polished with a grinding wheel until the surface is smooth and meets the manufacturing requirements; finally, the cut plate is placed in a washing tank and cleaned by plasma cleaning to remove surface impurities, thereby forming a substrate layer 10 with a smooth surface for easy coating.

[0051] S300 , coating the surface of the substrate layer 10 with an anti-reflection hardening liquid and curing the liquid to obtain a hardened anti-reflection connecting layer 20 .

[0052] Depending on the usage scenario, the lens is set in different ways. For example, the optical lens used on the camera has its inner side facing the inside of the camera and its outer side in contact with the air. Therefore, in this embodiment, an anti-reflection hardening liquid is coated on the outer side of the substrate layer 10 to form a hardened anti-reflection connecting layer 20. The anti-reflection hardening liquid contains a coupling agent, which can increase the adhesion of the surface of the substrate layer 10, and can be evenly spread on the surface of the substrate layer 10 to form a transparent light-transmitting layer, reduce light reflection on the substrate layer 10, and increase light flux.

[0053] S400 , coating a nano-super-hydrophilic solution on the hardened anti-reflection connecting layer 20 and curing the solution to obtain a nano-super-hydrophilic protective layer 30 .

[0054] A nano-superhydrophilic solution is directly coated on the hardened anti-reflection connecting layer 20 to form a nano-superhydrophilic protective layer 30. The nano-superhydrophilic protective layer 30 has high bonding strength with the hardened anti-reflection connecting layer 20 and is resistant to water and weather. Therefore, the optical lens has a firm structure and good integrity, which is conducive to long-term use.

[0055] The nano super-hydrophilic protective layer 30 disclosed in this embodiment is a nano-film layer with super-hydrophilic functional groups on the surface, which has a strong destructive effect on the interfacial tension between water and oil, and can make the dispersed phase (such as pesticides, oil) evenly dispersed in the continuous phase (such as water) in the form of tiny droplets, attracting water molecules to diffuse rapidly, thereby preventing the droplets from aggregating, and blocking corrosive substances such as pesticides on the hydrophilic surface, reducing the chance of immersion in the substrate, thereby increasing the corrosion resistance.

[0056] By utilizing the affinity of the molecules of the polar groups for water molecules, specifically, in one implementation of this embodiment, the contact angle of the nano super hydrophilic protective layer 30 is less than 5°. By utilizing the hydrophilicity of the hydrophilic film 40, water vapor in the air can be adsorbed on the surface of the film layer to form a uniform water film 40, thereby isolating sewage and dirt to keep the lens surface clean.

[0057] Specifically, as another implementation of this embodiment, the particle size of the nano-modified silicon dioxide particles is disclosed to be 10-100 nanometers. In this embodiment, the nano-modified silicon dioxide needs to be dissolved in ethanol, so the particle size needs to be controlled below 100 nanometers; at the same time, the particle size of the nano-modified silicon dioxide is at least 10 nanometers to facilitate mixing and avoid agglomeration.

[0058] Specifically, as another implementation of this embodiment, the superphilic solution is coated on the activated hardened anti-reflection connecting layer 20 by spin coating or spray coating. The superphilic solution disclosed in this embodiment can be stored in a sealed cabin after being prepared, and then coated by spin coating or spray coating, and can be evenly coated on the surface of the hardened anti-reflection connecting layer 20, thereby increasing the adhesion of the coating and improving the quality of the coating.

[0059] Specifically, in this embodiment, a three-layer structure including a water film 40, a nano-super hydrophilic protective layer 30, and a hardened anti-reflection connecting layer 20 is used to form a multi-layer barrier, which has the effect of protecting the substrate layer 10, avoiding corrosion problems that are easy to occur when used in the agricultural and chemical industries, and extending the effective service life of the optical lens.

[0060] In addition, in this embodiment, a multi-layer film is provided on the surface of the substrate layer 10, and the bonding strength between the film layers is high, thereby improving the wear resistance of the optical lens and reducing the probability of film breakage and peeling.

[0061] In addition, a water film 40 is formed on the surface of the nano super hydrophilic protective layer 30 in this embodiment, so light can pass through the water film 40 and enter the nano super hydrophilic protective layer 30, the hardened anti-reflection connecting layer 20 and the substrate layer 10 in sequence, with good light transmittance. When water in the air contacts the surface of the film layer, it can diffuse quickly, reducing fogging and improving the transparency of the optical lens.

[0062] In general, the optical lens disclosed in this embodiment forms a substrate layer 10 by cutting a substrate. According to the manufacturing requirements of the optical device, the substrate layer 10 can be made into various shapes such as elliptical and square. After the substrate layer 10 is made, an anti-reflection hardening liquid is coated on the surface of the substrate layer 10 and cured to form a hardened anti-reflection connecting layer 20, which can not only enhance the structural strength of the substrate layer 10 and improve safety, but also increase the light transmittance of the optical lens, reduce light reflection on the surface of the substrate layer 10, increase the light flux, maintain good optical performance, and enable the optical device to collect clearer image information.

[0063] For example, in agricultural work, the use of pesticides is common. The optical lens disclosed in this embodiment is used in agricultural plant protection equipment such as drone cameras and lidars. It has a good isolation effect on both low-concentration emulsified pesticides and high-concentration oily pesticides, and can prevent pesticides from contacting the surface of the lens for a long time. The water film 40 is used for isolation, which facilitates cleaning and maintenance and reduces corrosion.

[0064] Specifically, as another implementation of this embodiment, step S300 is disclosed to specifically include:

[0065] S310, dissolving a silicon oxide-based compound in an isopropyl ketone solvent to prepare an anti-reflection hardening solution;

[0066] S320, soaking the substrate layer 10 in the anti-reflection hardening liquid for 10-60 seconds, or coating the anti-reflection hardening liquid on the substrate layer 10 by a spray coating device, and then setting the curing temperature to 70-90° C. and curing for 15-60 minutes to obtain a hardened anti-reflection connecting layer 20.

[0067] In this embodiment, based on the principle of like dissolves like, isopropyl ketone is used to dissolve the silicon oxide-based compound to increase the fluidity of the silicon oxide-based compound to prepare an anti-reflection hardening liquid, which is then coated on the surface of the substrate layer 10 by dip coating or flow coating. After being completely cured at a suitable temperature, a uniform hardened anti-reflection connecting layer 20 can be obtained. The operation is simple, and the film layer has a uniform thickness and good light transmittance.

[0068] Specifically, the refractive index of the silicon oxide-based compound in this embodiment is 1.4-1.5. The refractive index of the organic matter varies according to its structure, so by selecting an organic matter with a suitable refractive index, a silicon oxide-based compound with good optical performance is screened to improve the anti-reflection effect of the optical lens.

[0069] Specifically, as another implementation of this embodiment, it is disclosed that the silicon oxide-based compound is a silane coupling agent KH560 or a silane coupling agent KH550. The hardened anti-reflection connecting layer 20 made of the silane coupling agent KH560 or KH550 can meet the bonding performance requirements and light transmission performance requirements of the optical lens, and increase the structural strength and anti-reflection effect of the optical lens.

[0070] It should be noted that the present embodiment only cites silicon oxide-based compounds, but the protection scope of the present invention is not limited thereto. Other types of silicon oxide-based compounds can achieve the technical effects disclosed in this application and, as equivalent replacements for the concept of the present invention, should also be within the protection scope of this application.

[0071] Specifically, as another implementation of this embodiment, step S400 is disclosed to specifically include:

[0072] S410, placing the substrate layer 10 coated with the hardened anti-reflection connection layer 20 into a vacuum plasma cleaning machine for cleaning, and performing plasma activation on the surface of the hardened anti-reflection connection layer 20;

[0073] S420 , coating the activated hardened anti-reflection connection layer 20 with a super-hydrophilic solution, setting the curing temperature to 70-90° C. and curing for 10-60 minutes to obtain a nano super-hydrophilic protective layer 30 .

[0074] In this embodiment, the substrate layer 10 formed into the hardened anti-reflection connecting layer 20 is further processed. After cleaning to remove surface impurities, the functional groups on the surface of the hardened anti-reflection connecting layer 20 are activated by plasma activation to improve the bonding performance and better bond the super-hydrophilic solution, so that the super-hydrophilic solution can be evenly dispersed on the hardened anti-reflection connecting layer 20, and is completely cured at a suitable temperature to form a nano super-hydrophilic protective layer 30.

[0075] Specifically, in the embodiments of the present application, when curing and hardening the anti-reflection connecting layer 20 and the nano-super hydrophilic protective layer 30, the curing temperature is controlled at about 70-90°C. If the temperature is too low, it will affect the curing speed, prolong the manufacturing cycle, and easily increase the production cost; if the temperature is too high, it will easily cause the compound to deform and affect the normal use of the film layer, so it is most suitable to be in the range of 70-90°C.

[0076] Preferably, the curing temperature is set to 80° C. and the curing time is 15 minutes. An oven or dedicated drying equipment can be used for drying. A constant temperature is maintained during the drying process to make the cured film layer more uniform and improve the optical performance.

[0077] Specifically, as another implementation of this embodiment, the preparation steps of the superphilic solution are disclosed, including:

[0078] Q100, respectively measure nano-modified silica particles, silicone resin binder and ethanol in a volume ratio of 70%, 20% and 10%;

[0079] Q200, mixing the nano-modified silica particles with the ethanol, and dispersing them by ultrasonication to obtain an intermediate mixture; adding the silicone resin binder to the intermediate mixture and stirring evenly to obtain a superphilic aqueous solution.

[0080] Nano-silicon dioxide is an inorganic chemical material, commonly known as white carbon black. As it is ultra-fine nano-scale, with a size range of 1-100nm, it has many unique properties, such as optical properties against ultraviolet rays, and can improve the anti-aging, strength and chemical resistance of other materials. It has a wide range of uses. Nano-scale silicon dioxide is an amorphous white powder, non-toxic, odorless, and pollution-free. The microstructure is spherical, with a flocculent and mesh quasi-particle structure. The molecular formula and structural formula are SiO2.

[0081] However, powdered nano-silica is prone to agglomeration, and direct mixing is difficult to achieve true nano-level uniform dispersion. Therefore, it is necessary to first perform surface modification to improve its dispersibility before truly stable bonding can be achieved.

[0082] In the present embodiment, nano-modified silicon dioxide particles and silicone resin binder are added to ethanol and mixed according to a specific ratio, and similar dissolves in the same way principle is utilized to be uniformly dispersed, and viscosity is increased by silicone resin binder so that super-hydrophilic solution can be adhered to the hardened anti-reflection connecting layer 20 to form a uniform nano super-hydrophilic layer. Specifically, in the present embodiment, ethanol is used as a solvent, and nano-modified silicon dioxide particles are first dispersed in ethanol, and then silicone resin binder is added to improve the dispersibility and uniformity of super-hydrophilic solution, and reduce the risk of nano-modified silicon dioxide particles and silicone resin binder agglomeration. And then it is conducive to making uniform nano super-hydrophilic protective layer 30.

[0083] Specifically, in another implementation of this embodiment, the process of preparing the optical lens is as follows:

[0084] 1. A polycarbonate plate is cut into irregular sheets, and then polished and cleaned to form a substrate layer 10.

[0085] 2. Dissolve silane coupling agent KH550 in isopropyl ketone solvent to prepare an anti-reflection hardening liquid, apply it on the substrate layer 10 by dip coating, and then cure it in an environment of 80° C. for 30 minutes to obtain a hardened anti-reflection connecting layer 20.

[0086] 3. Use nano-modified silica particles with a particle size of 100 nanometers, a silicone resin binder, ethanol, etc. to prepare a super-hydrophilic solution in a volume ratio of 70%, 20%, and 10%, and then apply it on the hardened anti-reflection connecting layer 20 by spin coating, and cure it in an environment of 80°C for 30 minutes to obtain a nano-super-hydrophilic protective layer 30.

[0087] The optical lens prepared in this example was tested:

[0088] 1. Corrosion test of high concentration oily substances.

[0089] An oily marker was used to simulate the high concentration of oily pesticides that may adhere to the substrate in actual use. The uncoated substrate was used as the control group. The residues of the control group and the test group after low-pressure water spray cleaning were compared. Figure 2 As shown in the figure, the oily pen mark "H" of the control group still remains, resulting in insufficient clarity on the substrate surface, and many water droplets adhere to the substrate, affecting the clarity of the substrate; Figure 3 As shown, the oily pen mark "H" of the test group falls off completely, and a uniform water film 40 is formed on the surface of the optical lens, which has good light transmittance and does not affect the passage of light. The optical lens can be used normally.

[0090] 2. Corrosion test of low concentration emulsified substances.

[0091] The uncoated substrate was still used as the control group. Simethicone oil was applied to both the control group and the test group to simulate emulsified pesticides. The residues of the control group and the test group after being washed with low-speed running water were compared. Figure 4 As shown in the figure, the test circle of the control group (the part circled by the black circle in the figure) is still blurred. The untreated emulsion adheres to the surface, which is difficult to clean and easily causes corrosion. There is a lot of methyl silicone oil residue. Figure 5 As shown, the test circle of the test group (the part circled by the black circle in the figure) has high clarity. On the treated surface, the emulsion is dispersed on the water film and is not easy to adhere. The methyl silicone oil is completely rinsed off and the symbol "E" under the optical lens can be clearly identified.

[0092] 3. Corrosive substance immersion test.

[0093] The optical lens is immersed in a variety of solutions to test the optical performance of the optical lens in various corrosive environments. As shown in Table 1 below:

[0094] Table 1

[0095]

[0096]

[0097] 4. Pesticide immersion test

[0098] In this embodiment, the optical lens can be a laser radar cover. The laser radar cover is provided with a hardened anti-reflection connection layer 20 and a nano-super-hydrophilic protective layer 30. The product sample is placed in a pesticide (the pesticide is glyphosate isopropylamine salt, the active ingredient content: 41%) and immersed for 168 hours, then taken out for cleaning, and placed in the field of view of a microscope for observation. Figure 6 and Figure 7 As shown in the figure, the surface of the radar cover is clean and there is no obvious trace of pesticide residue. The untreated radar cover was used as the control group. After being immersed in pesticide for 168 hours, it was observed under the microscope. Figure 8 and Fig. 9 As shown, there are obvious pesticide residues and corrosion on the surface, and the mirror surface is not clear.

[0099] It can be seen that the preparation method of the optical lens disclosed in this embodiment is beneficial to improving the isolation effect of the optical lens against oily substances, thereby improving the corrosion resistance, increasing the structural strength and clarity of the optical lens, and extending the service life.

[0100] See also Fig.10 As another embodiment of the present application, a corrosion-resistant optical lens is disclosed, which is prepared by any of the corrosion-resistant optical lens preparation methods described above; wherein, the optical lens includes a substrate layer 10, a hardened anti-reflection connecting layer 20 and a nano-super hydrophilic protective layer 30 stacked in sequence.

[0101] The optical lens disclosed in this embodiment is provided with a hardened anti-reflection connection layer 20 and a nano-super hydrophilic protective layer 30, and the multi-layer structure protects the substrate layer 10. During use, the nano-super hydrophilic protective layer 30 can also absorb water in the air to form a water film 40, further isolating impurities or pollutants, so that the optical lens remains clean, improves corrosion resistance, has good light transmittance, and extends the service life of the optical lens.

[0102] As another embodiment of the present application, a lens protective film is disclosed for use with the corrosion-resistant optical lens as described above; wherein the lens protective film comprises a hardened anti-reflection connecting layer 20 and a nano-super-hydrophilic protective layer 30 which are stacked.

[0103] As another embodiment of the present application, an optical ball cover is disclosed, which includes the corrosion-resistant optical lens as described above.

[0104] The optical ball cover disclosed in this embodiment includes but is not limited to optical ball covers such as cameras, video cameras, and telescopes. The service life of the optical ball cover is extended and the safety of the use of the optical ball cover is increased by configuring corrosion-resistant optical lenses.

[0105] In summary, the present application discloses a method for preparing a corrosion-resistant optical lens, which includes: S100, providing a substrate; S200, cutting, polishing and cleaning the substrate to obtain a substrate layer 10; S300, coating the surface of the substrate layer 10 with an anti-reflection hardening liquid and curing it to obtain a hardened anti-reflection connecting layer 20; S400, coating the hardened anti-reflection connecting layer 20 with a nano-super-hydrophilic solution and curing it to obtain a nano-super-hydrophilic protective layer 30. The optical lens disclosed in the present invention is formed by coating the surface of the substrate layer 10 with an anti-reflection hardening liquid and curing it to obtain a hardened anti-reflection connecting layer 20, increasing the adhesion by hardening the anti-reflection connecting layer 20, and continuing to coat the nano-super-hydrophilic solution on the hardened anti-reflection connecting layer 20 to obtain a nano-super-hydrophilic protective layer 30. By utilizing the hydrophilicity of the hydrophilic film 40 layer, water vapor in the air can be adsorbed on the surface of the film layer to form a uniform water film 40. The three-layer structure of the water film 40, the nano-super hydrophilic protective layer 30, and the hardened anti-reflection connecting layer 20 protects the substrate layer 10, avoids corrosion problems that are easy to occur when used in the agricultural and chemical industries, and extends the effective service life of the optical lens.

[0106] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0107] It should be noted that the present invention takes the method for preparing corrosion-resistant optical lenses as an example to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to the method for preparing corrosion-resistant optical lenses, and can also be applied to the production and use of other similar workpieces.

[0108] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a corrosion-resistant optical lens, characterized in that: include: providing a substrate; Cutting, polishing and cleaning the substrate to obtain a substrate layer; Coating an anti-reflection hardening liquid on the surface of the substrate layer and curing the liquid to obtain a hardened anti-reflection connecting layer; A nanometer super-hydrophilic solution is coated on the hardened anti-reflection connecting layer and solidified to obtain a nanometer super-hydrophilic protective layer.

2. The method for preparing a corrosion-resistant optical lens according to claim 1, characterized in that: The step of coating the anti-reflection hardening liquid on the surface of the substrate layer and curing the liquid to obtain the hardened anti-reflection connecting layer specifically includes: A silicon oxide-based compound is dissolved in an isopropyl ketone solvent to prepare a reinforced anti-transmission hardening solution; The substrate layer is immersed in the anti-reflection hardening liquid for 10-60 seconds, or the anti-reflection hardening liquid is coated on the substrate layer by a spray coating device, and then the curing temperature is set to 70-90° C. and the curing time is 15-60 minutes to obtain a hardened anti-reflection connecting layer; Wherein, the refractive index of the silicon oxide-based compound is 1.4-1.

5.

3. The method for preparing the corrosion-resistant optical lens according to claim 2, characterized in that: The silicon oxide-based compound is silane coupling agent KH560 or silane coupling agent KH550.

4. The method for preparing a corrosion-resistant optical lens according to claim 1, characterized in that: The step of coating a nanometer super-hydrophilic solution on the hardened anti-reflection connecting layer and curing the solution to obtain a nanometer super-hydrophilic protective layer specifically comprises: Putting the substrate layer coated with the hardened anti-reflection connecting layer into a vacuum plasma cleaning machine for cleaning, and performing plasma activation on the surface of the hardened anti-reflection connecting layer; The super-hydrophilic solution is coated on the activated hardened anti-reflection connecting layer, and then the curing temperature is set to 70-90° C. and cured for 10-60 minutes to obtain a nano super-hydrophilic protective layer.

5. The method for preparing a corrosion-resistant optical lens according to claim 4, characterized in that: The preparation steps of the superphilic solution include: Nano-modified silica particles, silicone resin binder and ethanol were measured in a volume ratio of 70%, 20% and 10% respectively; The nano-modified silica particles are mixed with the ethanol and dispersed by ultrasound to obtain an intermediate mixture; the silicone resin binder is added to the intermediate mixture and stirred evenly to obtain a superphilic aqueous solution.

6. The method for preparing the corrosion-resistant optical lens according to claim 5, characterized in that: The particle size of the nano-modified silica particles is 10-100 nanometers; and / or the contact angle of the nano-super-hydrophilic protective layer is less than 5°.

7. The method for preparing a corrosion-resistant optical lens according to claim 4, characterized in that: The superphilic solution is coated on the activated hardened anti-reflection connecting layer by spin coating or spray coating.

8. A corrosion-resistant optical lens, prepared by the method for preparing a corrosion-resistant optical lens according to any one of claims 1 to 7; characterized in that: The optical lens comprises a substrate layer, a hardened anti-reflection connecting layer and a nanometer super-hydrophilic protective layer which are stacked in sequence.

9. A lens protective film for the corrosion-resistant optical lens as claimed in claim 8; characterized in that: The lens protection film comprises a hardened anti-reflection connection layer and a nanometer super-hydrophilic protection layer which are stacked.

10. An optical ball cover, characterized in that: Comprising the corrosion-resistant optical lens as described in claim 8.

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