This is the paraboloidal mirror at the bottom of the tube. 是位于镜筒底部的一块抛物面镜。
The off-axis parabolic mirror is developed for the Singaporean synchrotron radiation light source development in this paper,in cluding Parabolic mirror fabrication and testing. 大离轴抛物面镜的加工与检测是当今光学加工的热门课题。
