之前回家了,好久没登了,这个我也不知道 tl^m=(ZQ
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。 |7c`(.
u5F}( +4r
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. 2*Q3.2 Z
Buchdahl develops specific equations by which the higher-order contributions may be ?bI?GvSh
calculated. The equations for the fifth-order contributions are very complex and are usu- Y`^o7'Z2^P
ally calculated as part of a computer optical software package