之前回家了,好久没登了,这个我也不知道 m'%Z53&
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。 {l7@<xZ??M
%KmB>9
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. 6)eU &5z1?
Buchdahl develops specific equations by which the higher-order contributions may be K,IPVjS
calculated. The equations for the fifth-order contributions are very complex and are usu- )LYj,do
ally calculated as part of a computer optical software package