之前回家了,好久没登了,这个我也不知道 ^u= PdBY
在modern lens design英文第一版中329页中有个注释提到了这个。看来是用来计算higher-order contributions的。 t%0r"bTi
Hf!9`R[
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. 2Zv,K- G
Buchdahl develops specific equations by which the higher-order contributions may be zojuH8
calculated. The equations for the fifth-order contributions are very complex and are usu- yp( ?1
ally calculated as part of a computer optical software package