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

1.矫正色的复合式透：红、绿和蓝三原色的色都已矫正。

2.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.

2.并将二元光画在透的表，在校正系统初级像的同时，实现了系统的复消色。