Film coating glass lens

Abstract

The film coating glass lens includes one glass substrate, the first film layer formed on the first surface of the glass substrate, and the second film layer formed on the other surface of the glass substrate. The first film layer consists of several layers of optical films, and the second film layer consists of several layers of anti-reflecting films. The optical films and the anti-reflecting films have corresponding layer numbers to maintain the balance of surface tensions of the glass substrate and the increased transmittance. The film coating glass lens has the stress produced in coating films eliminated and has raised optical performance.

Description

【Technical field】 [0001] The invention relates to a glass lens, in particular to a coated glass lens. 【Background technique】 [0002] For a glass lens in an ideal state, the light can completely pass through the glass lens and be fully focused on the film or CCD (Charge Coupled Device, Charge Coupled Device), but any object has a reflection effect on the light. Lanthanum oxide optics Take glass as an example, its light transmittance can reach 90%, and the remaining 10% of the light is reflected as glare; in addition, the general glass lens has poor wear resistance and corrosion resistance, and long-term use will easily lead to wear and deterioration of the mirror surface Furthermore, with the demand for lenses with various functions, glass lenses generally require surface coating treatment after forming, that is, to form coated glass lenses. Grinding film, anti-reflection film, broadband multi-layer film, narrow-band multi-layer film, spectroscopic film, filter film and ref...

AI Technical Summary

Problems solved by technology

[0003] Coated glass lenses in the prior art, such as infrared cut-off filter lenses (Infra-Red Filter) and low-pass filter lenses (Low Pass Filter), etc., are usually coated with multi-layer films on one side of a glass substrate to achieve the required functions. However, in order to meet the application characteristics and needs of various products today, the glass substrates used are getting thinner and thinner, with a common thickness of 0.3 mm or even smaller thicknesses, and there is stress between the multi-layer films in the coating, and As the thickness decreases and the number of coating layers increases, the stress generated will easily bend or deform the glass substrate, which will seriously affect the quality of the product. If the number of coating layers is small, it will affect the optical and other predetermined properties

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