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评价传象束一般仅局限于其静态特性，即表面疵病、几何和光学特性等。本文提出了传象束使用中需要注意的几个方面，以便更好地应用
Evaluation of the image beam is generally limited to its static characteristics, namely surface defects, geometry and optical properties. In this paper, several aspects that need to pay attention to in the use of image beams are put forward for better application