之前回家了,好久没登了,这个我也不知道 iyXd"O
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。 VT=gb/W6)a
w0vsdM;G
The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. :"H?phk
Buchdahl develops specific equations by which the higher-order contributions may be '2|P-/jU
calculated. The equations for the fifth-order contributions are very complex and are usu- _6'@#DN
ally calculated as part of a computer optical software package