为了减少视场倾斜，提高成像质量，必须确定掠入射角和确定光阑的位置。

In order to reduce the inclination of the field of view (FOV) and improve the image quality, it is important to determine the grazing incident Angle and the position of stops.

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镜头光阑是非接触式光学成像系统中的一个重要部件，并对CCD相机上采集到的图像具有重大影响。

The camera lens diaphragm is an important component in a noncontact optical imaging system and has a crucial influence on the images registered on the CCD camera.

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