The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.

介绍光谱基本原理,给出波法设计复消色物镜方程组。

By chiseling a BOL on a surface of a lens, a apochromatic system is composed, which actualizes the system's apochromatism, as well as revising primary aberration.

并将元光学刻画在透镜，在校正系统初像同时，实现系统复消色。