Antireflection glass and preparation method thereof

Abstract

The invention discloses a piece of antireflection glass. The antireflection glass is prepared by using aluminosilicate glass as a substrate; the visible light full-wave band average transmittance is higher than or equal to 94.5%, and the film coated surface single-side full-wave band average reflectivity is smaller than or equal to 1%; the antireflection glass is high in hardness, scrape resistance, acid-base resistance and follow-up processability. The antireflection glass comprises the aluminosilicate glass substrate, a first low-refractive index layer, a first high-refractive index layer, a second low-refractive index layer, a second high-refractive index layer, a third low-refractive index layer, a third high-refractive index layer, a fourth low-refractive index layer, a fourth high-refractive index layer, a fifth low-refractive index layer, and a fifth high-refractive index layer, wherein the first low-refractive index layer is made of SiO2; the first high-refractive index layer is made of Nb2O5. The antireflection glass is lower in the film coated surface single-side full-wave band average reflectivity, higher in hardness, and very suitable for acid and alkali treatment in the follow-up manufacturing procedures, so as to be adapted to more working procedures and achieve wider application range. The invention further discloses a preparation method of the antireflection glass.

Description

technical field [0001] The invention relates to an aluminosilicate glass as a substrate, the average transmittance of visible light in the whole band is ≥ 94.5%, the average reflectance of the single side of the coating surface in the whole band is ≤ 1%, high hardness, scratch resistance, acid and alkali resistance, and subsequent processing Strong anti-reflection glass and preparation method thereof. Background technique [0002] With the popularity of smart touch phones and tablets, more and more people develop the habit of using touch electronic products. There is a cover glass on the top of the screen of the touch electronic product, but because the glass has the function of reflecting light, when the outdoor sunlight or indoor strong light is stronger than the transmitted light of the LCD backlight, there will be about 4.2% of the reflected light on each surface of the glass Reflected into the human eye, the eyes cannot see the content displayed on the screen clearly, ...

AI Technical Summary

Problems solved by technology

[0006] Using TiO 2 Although the produced AR film is harder in hardness, TiO 2 Dark spots will appear under UV light irradiation. Although the dark spots gradually fade with time, they will reappear after UV irradiation, which will affect the visual effect of the product.

And Nb 2 o 5 It is dissolved in lye, and the surface layer is made of Nb 2 o 5 If the AR products are cleaned with lye and ultrasonically lyeed in the subsequent processing steps, some Nb will appear 2 o 5 The phenomenon of layer dissolution destroys the optical film layer, thereby destroying the optical effect of the anti-reflection film; at the same time, the Nb 2 o 5 and SiO 2 The Vickers hardness is only 560Hv and 640Hv. If these two materials are used for all the film layers, the anti-reflection film generated will be easily scratched during subsequent processing and end customer use, which will affect the appearance of the product and customer acceptance.

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