BADFISH 发表于 2004-10-9 00:32:00

working-f-number

<P>who can tell me what working-f-number is, I can't find the answer.</P>
<P>thank you very much!</P>

cncheung 发表于 2004-10-11 05:01:00

<P>是在ZEMAX 中出現吧</P><P>F NO=FOCAL LENGHT/APERTURE</P>

hx0999 发表于 2004-10-11 17:27:00

学习中。。

dhn85 发表于 2008-9-26 17:07:03

where are you from?about tan(u")
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