之前回家了,好久没登了,这个我也不知道 ^ vbWRG~
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。 P(h5=0`*PR
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The fifth, seventh, etc., orders may also be computed from paraxial raytrace data. (wA?;]q(
Buchdahl develops specific equations by which the higher-order contributions may be !T'X
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calculated. The equations for the fifth-order contributions are very complex and are usu- 509Q0 [k
ally calculated as part of a computer optical software package