中文手冊中第8張分析菜單中關于MTF介紹有這么一句話“因為zemax不考慮矢量衍射，MTF 數(shù)據(jù)對大于F/1.5的系統(tǒng)是不準確的（精度的衰退變化是逐步的）”，對照英文手冊，在這一節(jié)沒有相應對照部分，不過在PSF的介紹中找到一條線索“For most lenses, a less important assumption is that scalar diffraction theory applies. The vectorial nature of the light is not accounted for. This is significant in systems that are very fast, around F/1.5 (in air) or faster. The scalar theory predicts overly optimistic (a smaller PSF) results when the F/# is very fast.”。 38GZ_ z}r
關于書上這兩點有幾點疑問， *W2 o$_Hs
1.中文部分說MTF對F數(shù)大于1.5的系統(tǒng)不準確，據(jù)我所知，小F數(shù)下標量衍射就不準確了，zemax基于標量衍射，為什么它說是大于1.5不準確呢？ &r2\P6J
2.英文中最后兩句話是怎么理解，翻譯都感覺不通。 8`_tnA RIX
求高人指點迷津，感激。
