之前回家了,好久没登了,这个我也不知道 Z$KLl((
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。 <Cpp?DW_
M6|I6M<
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. x+5p1sv6
Buchdahl develops specific equations by which the higher-order contributions may be `m@U!X
calculated. The equations for the fifth-order contributions are very complex and are usu- pcS+o
ally calculated as part of a computer optical software package