提出了一种用于干涉光谱仪中的新型Wollaston棱镜系统———带反射镜的Wollaston棱镜系统。对其结构及光束在其中的传播特性进行了深入分析,并对两束光的光程差进行了计算机模拟。结果表明光程差与入射点位置的关系具有极好的线性,并且所得光程差的动态范围为同类装置的二倍。研究结果为偏振型空间调制干涉光谱仪的设计和应用提供了理论依据。 A new Wollaston prism system for interferometric spectroscopy was proposed - a Wollaston prism system with a reflector. The structure and the propagation characteristics of the beam in it are deeply analyzed, and the optical path difference between the two beams is simulated by computer. The results show that the optical path difference has a very good linear relationship with the position of the incident point, and the dynamic range of the resulting optical path difference is twice that of the same type of device. The results provide a theoretical basis for the design and application of Polarization Space Modulation Interferometer.