measurement of optical path difference
measurement of optical path difference
光程差的测量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Most of traditional methods of angular measurement based on a Michelson Interferometer or its modifications have the same principle: the rotation is transformed into an optical path difference (OPD).
传统激光干涉测角方法，大多采用迈克尔逊干涉仪光路或其变形，将角度测量转变为光程测量。
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