Error separation method of lens based on centering machining

透镜基于定心加工的误差分离方法

Abstract

本发明涉及一种透镜基于定心加工的误差分离方法,搭建光学系统:通过光学系统寻找透镜的两个球面的球心自准直像,旋转车床回转轴并粗调姿态控制工装,使两个球心像晃动量较小;通过CCD相机配合PC机捕获计算两球心像的晃动量;将两球心像的晃动量带入公式计算出透镜的偏心量和倾斜量;精调姿态控制工装,直至使得透镜的偏心量和倾斜量都在设计指标范围以内;为了解决现有的透镜定心加工方法针对薄透镜不够准确的技术问题,本发明通过对光学元件的偏心量和倾斜量的分离计算,可以在线检验光学元件定心加工能否满足设计指标的要求,提高透镜的精度。
The invention relates to an error separation method of lens based on centering machining. The method comprises establishing an optical system; finding auto-collimation images of centers of two spheres of a lens using the optical system, rotating a lathe rotator and coarsely adjusting an attitude control tool, to make the two images of centers of spheres low in shaking value; acquiring shaking values of the two images of centers of spheres through cooperation of a CCD camera and a PC; calculating an offset and an inclined value of the lens through bringing the shaking values of the two images of centers of spheres in a formula; finely adjusting the attitude control tool, until the offset and an inclined value of the lens are within a range of designed indexes. Aiming to solve the technical issue that a thin lens cannot accurately machined through a present centering machining method, the offset and the inclined value of an optical component are respectively calculated by using the error separation method, whether deigned indexes of the optical component meet requirements or not during centering machining can be examined on line, the precision of the lens can be raised.

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