之前回家了,好久没登了,这个我也不知道 RK@K>)"f
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。
)F hbN@3
nP*DZC0kE&
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. Lf9s'o}.R
Buchdahl develops specific equations by which the higher-order contributions may be b6S"&hs
calculated. The equations for the fifth-order contributions are very complex and are usu- :Jyr^0`J
ally calculated as part of a computer optical software package