kimclps:使用說明書Chapter 2 page 26
QjUojHz%Z The chief ray (or principal ray) from every field point will be iterated to pass
Z@:R'u2Lk through the center (x=0, y=0) of the stop surface, unless you override this behavior
[6Nzz]yy with chief ray aiming (this is only necessary in a few unusual sit ..
(2016-10-10 14:44) S4X['0rX!