Three linear array CCD are usually used to measure dimensional position of an object in noncontact position measuring system.
在一般的非接触式位置测量系统中，通常使用三个线阵CCD来测量物体的空间位置。
The adverse projection measuring method reverse the position of object and image in the imaging system of lens, it overcome back focus length and resolution power limitation.
逆投影法颠倒镜头成像系统物和像的位置，克服了手机镜头后焦、像素等的限制。
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