It has the virtues of high machining precision and high automatization compared with other traditional correcting systems. 它相对于其他传统校正系统具有加工精度高，自动化程度高的特点。
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透镜的表面，在校正系统初级像差的同时，实现了系统的复消色差。
