Non-spherical lens design method and non-spherical lens

Abstract

The invention embodiment discloses a design method of an aspherical lens, which comprises: the surface with the semidiameter of R1 is taken as the spherical surface part of the aspherical lens; the surface with the approximate curvature radius of R2 is used as the aspherical surface part of the aspherical lens; the approximate curvature radius is the curvature radius value of the aspherical surface obtained by the spherical surface, and the absolute value of R2 is more than or equal to the double absolute value of R1. The invention embodiment also discloses an aspherical lens, and R2 is controlled to ensure that the absolute value of R2 is more than or equal to the double absolute value of R1. Therefore, the aspherical surface part of a correction system chromatic aberration is smoother than the spherical surface part, and the designed aspherical surface part lens can meet the optical requirement in using and is easy for processing and testing.

Description

technical field [0001] The invention relates to the field of optics, in particular to an aspheric lens design method and the aspheric lens. Background technique [0002] Aspherical lens is a very important optical device, which can obtain unparalleled good imaging quality of spherical optical devices, and can well correct various aberrations in the optical system, improve imaging quality, and improve system identification ability. The optical system composed of multiple spherical devices can be replaced by one or several aspherical devices, thereby simplifying the structure of the instrument, reducing the cost and effectively reducing the weight of the instrument. [0003] At present, aspheric lenses are gradually widely used in optical systems, fiber coupling, laser collimation, laser focusing, magnetic disks, light energy detection and other optical systems in wireless optical communication equipment. Please refer to figure 1 and figure 2 as shown, figure 1 Schematic d...

AI Technical Summary

Problems solved by technology

[0004] Although the aspheric lens has broad prospects, the smaller the approximate radius of curvature of the aspheric part of the aspheric lens is relative to the radius of the spherical part, the more convex or concave the surface will be. Or the more concave the aspheric surface is, the more difficult it is to process and test, and even the designed aspheric lens cannot be processed or tested. Even if such an aspheric lens can be processed, the cost and processing cycle will be very expensive.

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