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本文描述用莫尔偏折术测量透镜焦距的原理,对应用的三个公式进行了分析和评估,在长焦距测定范围内莫尔法和放大率法的精度是接近的。
This paper describes the principle of measuring the focal length of the lens by Moire deflectometry, and analyzes and evaluates the three formulas applied. The accuracy of the Moire method and the magnification method are close within the range of the long focal length measurement.