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建立了一种高精度波片位相延迟量的测量装置，它以磁光调制式１／４波片法为基础，其测量精度优于ＫＤＰ电光调制检测法。本文介绍了磁光调制器的设计，总结了磁光调制方法的最优解调特性，提出了测量装置的结构，其中强调了磁光调制器必须放置在标准１／４波片之后以满足最优解调特性。误差分析表明，环境温度和机械安装是影响测量精度的重要因素。实验对同一批波片进行了长时间多次重新安装测量，其复现精度优于２０′
A measuring device for phase retardation of high-precision wave plate is established, which is based on the magneto-optic modulation 1/4 wave plate method and its measuring accuracy is better than KDP electro-optic modulation detection method. This paper introduces the design of magneto-optic modulator, summarizes the optimal demodulation characteristics of magneto-optic modulation method, and proposes the structure of the measurement device, which emphasizes that the magneto-optic modulator must be placed after the standard 1/4 wave plate to meet the most Excellent demodulation characteristics. Error analysis shows that ambient temperature and mechanical installation are important factors affecting the measurement accuracy. Experiments on the same batch of waves for a long time several reinstallation measurements, the recurrence accuracy is better than 20 ’