yishuizhit:圆形挡光和圆形光圈可以在ZEMAX表面类型-孔径类型里选择。我的理解圆形挡光，是圆形挡板周围的光通过；圆形光圈，是中心的光通过。 (2012-03-06 11:21) V }<Hx3!
` \!oY;jk 那比如我想在R-C系统中的主镜上加一个光圈，是怎么设置，光圈大小应该多大？
yishuizhit
2012-03-07 11:14
Circular Aperture/Obscuration: A Circular Aperture defines an annular region which vignettes all rays which strike the surface inside of the minimum radius, and outside of the maximum radius. If the ray is between the minimum and maximum radii, then the ray will be allowed to proceed. The Circular Obscuration is the complement of the Circular Aperture. TTB1}j+V6 上次回答不够准确，上面是说明书上的定义。
