Spectacle lens design method

Abstract

The invention relates to a glasses chip designing method which comprises the following steps: first designing it according to domain glass chip: choosing first side as plane, ascertaining the second side according to glass chip degree formula; then adjusting optical aberration of second said by non-domain optimum method: using the optimum method to define a performance function which comprises the considered control item and can be expressed to a function with non-domain factor and quadric surface factor parameter; computing the result of performance function by damped least square method.

Description

【Technical field】 [0001] The invention relates to a spectacle lens design method, in particular to a spectacle lens design method adopting an aspherical surface design. 【Background technique】 [0002] For the life and work of modern people, glasses are already a familiar product for everyone, especially for myopic groups, glasses are already a must-have for them. People's requirements for spectacle lenses generally hope that spectacle lenses have light weight, thin thickness, flat mirror surface, and small aberrations, and spectacle lenses with better performance largely depend on the design method of spectacle lenses. [0003] Conventional ophthalmic lens design method adopts spherical design, because in spherical design, only one surface radius of curvature can correct aberrations, so in order to correct aberrations, the center thickness of ophthalmic lenses is thicker, and the appearance is very bulky. In another spherical design, the curvature of the first surface is cl...

AI Technical Summary

Problems solved by technology

[0006] In this aspheric surface formula, an even-order term is introduced to design an aspheric lens, and the designed aspheric lens has a symmetrical shape, which makes lens processing easier, but the conic coefficient value in this design is 1, which shows that the aspheric surface design It is designed on the basis of a spherical surface. Although the designed spectacle lens can correct astigmatism compared with the spherical spectacle lens, the design effect of the spectacle lens cannot meet people's requirements for thinner, flatter and lighter lenses. In addition, the spectacle lens The design of aspheric spectacle lenses does not consider the influence of inflection points brought about by aspheric coefficients. Usually, when there are many aspheric coefficients, aspheric surfaces are prone to inflection points, which will cause difficulties in manufacturing.

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