Evaluation Method for Refractive Index Uniformity of Optical Materials

Abstract

The present invention relates to an optical material refractive index homogeneity evaluation method, and relates to the technical field of optical material refractive index homogeneity evaluation. A close relation between optical material refractive index homogeneity defects and application influences thereof is established to provide a new evaluation concept, an index and an uncertainty relationthereof of the optical material refractive index homogeneity and establish an evaluation relation mathematical calculation method, and based on the provided mathematical calculation method, a new optical material refractive index homogeneity evaluation method is designed. The optical material refractive index homogeneity evaluation method can really reflect the influence of the refractive index homogeneity on the optical system imaging when the optical materials are used and can reflect the influence of the craft materials on the optical material refractive index homogeneity to provide the reasonable evaluation index and method for the optical material homogeneity test and provide more reliable refractive index homogeneity index for the optical system design with a high imaging quality.

Description

technical field [0001] The invention relates to the technical field of evaluating uniformity of refractive index of optical materials, in particular to an evaluation method of uniformity of refractive index of optical materials. Background technique [0002] The uniformity of the refractive index of optical materials is the defect of non-uniform refractive index of optical materials caused by the refining process of optical materials. This defect will seriously affect the imaging quality of the optical system. Therefore, there is a need for evaluation methods for optical materials. Evaluate the problem degree of the uniformity of the refractive index in order to effectively control the defects of the uniformity of the refractive index of the optical material and guarantee the quality of the optical material. The previous evaluation method for the uniformity of the refractive index of optical materials is to use the index of the maximum variation of the refractive index in th...

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Problems solved by technology

In practice, although figure 1 The local maximum refractive index difference peak-to-valley value Δn in PV significantly greater than figure 2 The local maximum refractive index difference peak-to-valley value Δn in PV ,but figure 2 The influence of the uniformity of optical materials on the imaging quality of the optical system is obviously greater than that of figure 1 the big

According to the prior evaluation method for the uniformity of refractive index of optical materials, figure 1 problems than figure 2 This has led to the unreliable and unrealistic problem of the previous evaluation methods

Due to the peak-to-valley value Δn of the refractive index of the optical material PV It is obtained through simple calculations. The amount of test information used by the algorithm for material problems is not enough and has little to do with mathematical calculations. Therefore, it is difficult to fully and truly express the problem of uniformity of refractive index of optical materials.

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