Anti-reflection waterproof film, preparation method thereof and optical lens

Abstract

The invention discloses an anti-reflection waterproof film, a preparation method thereof and an optical lens. The anti-reflection waterproof film comprises a substrate, an anti-reflection layer located on the substrate and a waterproof layer located on the anti-reflection layer, wherein the anti-reflection layer comprises a plurality of low-refractive-index film layers and high-refractive-index film layers, the low-refractive-index film layers and the high-refractive-index film layers are arranged alternately, the refractive index of the low-refractive-index film layers is smaller than or equal to 1.5, the refractive index of the high-refractive-index film layers is greater than or equal to 1.8, and the material of the waterproof layer contains fluoride. According to the anti-reflection waterproof film, the anti-reflection layer and the waterproof film layer are arranged, the high-refractive-index film layers and the low-refractive-index film layers of the anti-reflection layer are arranged alternately, therefore, average reflectivity within a visible light range can be greatly lowered, and light transmittance is greatly increased; and the waterproof film layer can increase the contact angle of water drops, so that the waterproof, oil-proof and stain-proof effects of the film are improved, and the problem that imaging is influenced by residues of water, stains and the like on alens surface on a rainy day is effectively solved.

Description

technical field [0001] The invention relates to the technical field of optical thin films, in particular to an anti-reflective waterproof film, a preparation method thereof, and an optical lens. Background technique [0002] Light transmittance is an important parameter of a vehicle lens. A vehicle lens group usually has 4 to 6 lenses and 8 to 12 surfaces. The visible light reflectance of each surface without antireflection coating is 4 to 8%. The light transmittance is about 46%. The low light transmittance will cause the image to be dark, and the difference between the center of the picture and the surrounding area will be large, resulting in bright center and dark surrounding areas, as well as light reflection inside the lens, stray light, ghosting, image distortion, etc. The situation occurs. [0003] In addition, when the vehicle-mounted lens is used in rainy or inclement weather, pollutants such as water droplets and mud remain on the surface of the lens, resulting in...

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Problems solved by technology

[0002] Light transmittance is an important parameter of a vehicle lens. A vehicle lens group usually has 4 to 6 lenses and 8 to 12 surfaces. The visible light reflectance of each surface without antireflection coating is 4 to 8%. The light transmittance is about 46%. The low light transmittance will cause the image to be dark, and the difference between the center of the picture and the surrounding area will be large,

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