apochromatic

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.

并将二元光学面刻画在镜表面，在校正系统初级像差同时，实现了系统复消差。

Apochromatic lens: Compound lens corrected for chromatic aberration, i.e. the three primary colours , red, green and blue are corrected. Also called Apochromat.

复消差镜:矫正差复镜：即是红、绿和蓝三原差都已矫正。