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汉语拼音：guāng lán

限制透镜或光学系统装置光孔的（如带孔的板）；光阑光圈快门。

• The physical stop which corresponds to the entrance window is then the required field stop.

  入射窗所对应的实物光阑就是所要求的场光阑.

• These apertures restrict the amount of light that can reach the detector.

  这些光阑将会限制到达探测器的光线的总量.

• Essentially, the field stop of the eyepiece encompasses a linear field of view from the telescope.

  从本质上讲, 目镜的视场光阑与望远镜有线性关系.

• These advantages are realized as a result of the wide - area aperture and the computational transforms.

  这些优点被认为是使用大口径光阑和计算转换的结构.

• Furthermore, the effect of aperture parameters on the diffraction characteristics of laser beams is also discussed.

  另外, 讨论了齿形光阑的参数对光束衍射特性的影响.