Film system designing method for optical thin film on optical lens with high caliber-curvature-radius ratio

Abstract

The invention discloses a film system designing method for an optical thin film on an optical lens with high caliber-curvature-radius ratio. For optimizing the performance of the optical system, the optical thin film with excellent spectral property consistency is required to be prepared on the optical lens with the high caliber-curvature-radius ratio, therefore, film system designing for the optical thin film is required to be optimized globally. According to the film system designing method provided by the invention, firstly, thickness distribution of the optical thin film on the optical lens with the high caliber-curvature-radius ratio is determined through experiments or theoretical analysis; and secondly, the film system designing for the optical thin film is optimized globally by adopting a numerical computation method according to the requirements of spectral properties and light incident angles in all positions of the optical lens with the high caliber-curvature-radius ratio. Compared with a traditional designing method for the optical thin film, the film system designing method provided by the invention gives consideration to the thin film thickness and light incident angles on the optical lens with the high caliber-curvature-radius ratio, and is particularly suitable for thin film designing for the optical thin films on various sizes of optical lenses with high caliber-curvature-radius ratios.

Description

technical field [0001] The invention relates to the field of design and preparation of optical thin film elements, in particular to an optical thin film film system design method for lenses with large curvature radius ratio. Background technique [0002] With the increasingly sophisticated design of the optical system, in order to meet the performance indicators of the optical system, more and more lenses with a large radius of curvature ratio are used in the optical system, and high-performance anti-reflection coatings need to be coated on the surface of the lens with a large radius of curvature ratio film, thereby improving the performance of the optical system. Usually, the residual reflection of the surface of the lens with a large radius of curvature will cause two serious consequences: first, the loss of light energy, which reduces the brightness of the image; Astigmatism, once the stray light reaches the image plane, the contrast of the image will be reduced, thus af...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the difficulties in the design of the optical film film system of the large-diameter curvature radius ratio lens due to the poor uniformity of the thickness of the optical film on the lens with the large-diameter curvature radius ratio and the wide distribution range of the incident light angle

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