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中文摘要：
从单轴晶体的双折射性质出发，应用光线追迹方法，研究了滤光器系统中光的传播规律。将光线的传播方向、相位信息和振动状态用人射角、入射光方位角和晶体参量表示出来，结合偏振光的干涉原理，辅以计算机编程，分析了多种误差源对透过带形状的影响。通过与Evans离轴效应公式的对比，得到0．7％的最大相对误差，从而验证了本文方法的正确性，为滤光器的研制提供了可靠依据。
英文摘要：
According to the birefringent property of uniaxial crystal, the ray tracing method was used to study the transmission law of ray in the filter system. With expressing the ray trace, phase and the vibration by the incident angle, azimuth and the crystal parameters, respectively, the effects of different error sources on the band shape were analyzed based on polarization interference theory and computer program. Experimental results show that the maximum relative error is 0.7% comparing with Evans equation, which demonstrates that the proposed method is correct and reliable for the filter development.
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