之前回家了,好久没登了,这个我也不知道 XJLQ{
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。 keB&Bjd&
TDd{.8qf
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. KiJT!moB
Buchdahl develops specific equations by which the higher-order contributions may be < yC
calculated. The equations for the fifth-order contributions are very complex and are usu- Ur*6Gi6
ally calculated as part of a computer optical software package