之前回家了,好久没登了,这个我也不知道 ;\1b{-' l
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。 zabw!@]
:0{AP_tvcC
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. YALyZ.d
Buchdahl develops specific equations by which the higher-order contributions may be *:k~g].Iz
calculated. The equations for the fifth-order contributions are very complex and are usu- j`Tm\!q
ally calculated as part of a computer optical software package