之前回家了,好久没登了,这个我也不知道 u9]1X1wV
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。 =g~j=v,e
~R.dPUr
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. Ld(NhB'7
Buchdahl develops specific equations by which the higher-order contributions may be %0XvJF)s
calculated. The equations for the fifth-order contributions are very complex and are usu- B:9.e?t
ally calculated as part of a computer optical software package