之前回家了,好久没登了,这个我也不知道 NKu*kL}W=
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。 .$r7q[
D{iPsH6};5
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. q>dERN&
Buchdahl develops specific equations by which the higher-order contributions may be (fC U+
calculated. The equations for the fifth-order contributions are very complex and are usu- NS^+n4
ally calculated as part of a computer optical software package