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.
反射望远镜能够做得很大,远大于折射望远镜。
Reflector telescopes can also be made much, much larger than refractors.
这种类型的望远镜称为反射望远镜,比折射望远镜更具有优势,后者需要用到两个透镜,而且会受到光学畸变效应的影响。
Such telescopes are called reflectors, and they offer major advantages over refractors, which use two lenses and suffer from optical distortion effects.
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