Double-sided anti-reflection film lens coating processing technology

Abstract

The invention relates to the field of anti-reflection film lens processing, and discloses a double-sided anti-reflection film lens coating processing technology particularly for a non-planar lens. Thetechnology adopts a creative spin coating technology, a Sol-Gel principle is utilized for making, the thickness of a coating layer is controlled through the spin speed, the turning time, the solventevaporation speed and the lens position to meet the needed optical performance requirements, the shorter the spinning time is, the smaller the thickness of the coating layer is, and the longer the turning time is, the smaller the coating layer thickness is; and the higher the solvent evaporation speed is, the thicker the coating layer is. According to the double-sided anti-reflection film lens coating processing technology, for the broadband wavelength from 400 nm to 800 nm, anti-reflection films with the high performance and the anti-reflection performance can be obtained; when the inclination angle (CRA) and the incident angle change, the visible range ripple and wavelength shift influence is small, a good reflection effect is achieved in the broadband wavelength range, generation of shadows or flares can be obviously reduced, and film firmness of the anti-reflection film structure is excellent.

Description

[0001] The invention relates to the field of anti-reflection film lens processing, in particular to a double-sided anti-reflection film lens coating process. Background technique [0002] Most of the optical elements included in the optical system, such as lenses and optical filters, are made of transparent substrates such as optical glass or optical plastic. The reflectivity will become higher, so that the effective amount of light reaching the image surface will be reduced. At the same time, the unnecessary reflection reflected from the light entrance and exit surface of the optical element will form ghosting and flare phenomenon when it enters the image surface, which makes the optical system of the optical system Therefore, in an optical component using a substrate, an anti-reflection function is provided on the light entrance and exit surface. [0003] In addition, unnecessary ghosts and flares that reach the image plane due to reflection from the light entrance and exit ...

AI Technical Summary

Problems solved by technology

[0004] For lenses, especially non-planar lenses, a single coating process is currently used on the market to coat a layer of anti-reflection film on the surface of the substrate. In some multi-layer films that use evaporation, the reflection can be reduced in the broadband wavelength range of 400nm to 730nm. In order to obtain a good anti-reflection function, a large number of coating layers is required. When the number of coating layers increases, when the incidence is at a strict oblique angle (CRA), the ripple in the visible field and the wavelength shift will have a greater impact. In broadband Achieving good reflectivity in the wavelength range becomes difficult

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