Highly transparent composite glass

Abstract

The present invention provides a highly transparent composite glass, which comprises plural layers of silicon dioxide films and plural layers of optical films, wherein the silicon dioxide films and the optical films are alternately arranged to form an odd-number layer film having odd number layers, the two outermost layers of the odd number layer film are the silicon dioxide films, the optical film has a refractive index of greater than or equal to 1.8, and the thicknesses of the two outermost layers of the films are respectively 45-50% of the thickness of the middle silicon dioxide film. According to the present invention, the strong optical resonance mode can be formed in the optical film through the reasonable design so as to match the light wave in the air and the composite glass, thetwo layers of the films positioned on the two outermost layers can achieve the smooth transition and perfect matching of the light wave in the air and the resonant mode in the high refractive index material, and importantly the complete match of the impedance of the near full-angle incident wave can be achieved so as to achieving the unexpected technical effect; and the composite glass has the flat surface, and is suitable for micro-nano optical devices with high flatness requirements.

Description

technical field [0001] The invention relates to the technical field of composite glass, in particular to a high-transparency composite glass. Background technique [0002] Ordinary quartz (silicon dioxide SiO 2 ) Glass has become one of the most common and widely used important optically transparent materials because of its high transparency to light waves. However, glass is not completely transparent to light waves, especially for light waves incident at large oblique angles, the reflection of glass is very obvious. Normally, for transverse electric waves (the electric field of the light wave is parallel to the glass plane), nearly 5% of the energy of the light wave incident on the flat glass plate from the air will be reflected back, and with the increase of the incident angle, There will be greater reflection, for example, when the incident angle is 60°, nearly 20% of the light waves will be reflected back, and when the incident angle increases to 80°, more than half of...

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Problems solved by technology

[0005] For the method of coating the surface of the glass plate with a "moth-eye" coating, although the anti-reflection effect in a wide range of angles can be achieved, because the "moth-eye" coating has some concave-convex structures, it will affect the glass. The flatness of the surface, which will have a great adverse effect on some micro-nano optical devices that require high flatness

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