诸挡光孔中，最有效的控制成像光束光能量者，称为孔径光阑。光学系统中每个透镜都是透光孔，还有一些专门设置的光孔。光学系统中的光阑包括孔径光阑、视场光阑、渐晕光阑和消杂光光阑等
这不是星星自身的光环，而是由于望远镜的圆形孔径光阑以及光的物理特性造成的。
This is not the star's disk you are seeing but the effect of having a circular aperture in your telescope and due to the nature of light.
得到的孔径光阑限制下高斯光束的传输规律为高斯光束在自由空间光通信和光学超分辨中的应用提供了理论基础。
These propagation rules of Gaussian beam limited by the aperture could promote the applications of Gaussian beam in the optical communication and the optical super resolution.
第一至第四透镜从物体顺序排列，孔径光阑置于第一透镜的物侧上。
The first through fourth lenses are arranged sequentially from the object, and an aperture diaphragm is disposed on the object side of the first lens.
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