kimclps:使用說明書Chapter 2 page 26
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NT The chief ray (or principal ray) from every field point will be iterated to pass
`wP/Zp{Hy through the center (x=0, y=0) of the stop surface, unless you override this behavior
4jDs0Hn" with chief ray aiming (this is only necessary in a few unusual sit ..
(2016-10-10 14:44)
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