光学系统设计中降低公差灵敏度的方法

摘要

基于初级像差理论提出了一种降低系统公差灵敏度的方法,即通过控制光学系统各元件表面的初级像差值以“小像差互补”达到像差平衡.首先阐明“小像差互补”含义,然后通过理论公式指出了初级像差与公差灵敏度的关系,最后举出一个航空相机光学系统的设计实例,通过对其“大像差互补”与“小像差互补”两种设计结果进行公差分析,结果表明利用“小像差互补”理念设计的光学系统使得公差分配宽松,提高了系统的稳定性,极大的降低了成本.%A method by controlling the primary aberration of each surface in the system based on Seidel aberration theory is proposed for reducing system tolerance sensitivity. First of all, it illustrates the principle of small aberrations balancing, and then the relation of the Seidel aberration theory and tolerance sensitivity is indicated by theoretical formula. At last, we enumerate an example which is the optical design of objective lens of aerial camera and make tolerances analysis both on the compensation of big aberration and small aberration. The results show looser tolerances distribution, better stability and great reduction of the cost on the compensation of small aberration.