之前回家了,好久没登了,这个我也不知道 ,#ZPg_x?1
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。 I8J>>H'#A
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The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. *Sj)9mp
Buchdahl develops specific equations by which the higher-order contributions may be /C!~v!;e
calculated. The equations for the fifth-order contributions are very complex and are usu- w ea
ally calculated as part of a computer optical software package