之前回家了,好久没登了,这个我也不知道 \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。 Har~MO?A
-^iUVO`z
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. "!%wh6`>Md
Buchdahl develops specific equations by which the higher-order contributions may be NfTCpA
calculated. The equations for the fifth-order contributions are very complex and are usu- X&(<G
ally calculated as part of a computer optical software package