牛顿望远镜和反射折射望远镜都有一个次级反射镜(或称斜反射镜)，它们阻挡了一部分主反射镜的发射光。
Newtonian and catadioptric telescopes have secondary (or diagonal) mirrors that obstruct a small percentage of light from the primary mirror.
巨大的反射望远镜的反射镜以光学聚集来自天体的光，转往两部相机和两部摄谱仪。
The reflector telescope's mirror optics gather light from celestial objects and direct it to an array of cameras and spectrographs.
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