本文介绍了调制式激光偏振仪的原理,精度分析及其特点。采用He-Ne激光器作为光源,在塞纳蒙补偿器(Senarmont Compensetor)系统中加入一个KDP电光调制器,在KDP晶体上加交变调制电压,使偏振场中得到交变的延迟量,提高了判断消光场的灵敏度和精确度,从而提高了仪器的测量精度。 This article introduces the principle, accuracy analysis and characteristics of the modulated laser polarimeter. Using He-Ne laser as the light source, a KDP electro-optic modulator is added to the Senarmont Compensetor system, and an alternating modulation voltage is applied to the KDP crystal to increase the amount of the alternating delay in the polarization field to improve the judgment Extinction field of sensitivity and accuracy, thereby improving the measurement accuracy of the instrument.