入射光的偏振和强度对分光镜透/反比的影响

Influence of Polarization and Intensity Variations of Incident Beam on Transmitting and Reflecting Intensities of a Beam Splitter

采用能量流分析法推导了一束线偏振光经分光镜分光形成透射/反射光的能量表达式。分别讨论了入射光强度不变而偏振方向变化以及二者同时变化对分光镜透/反比的影响。通过旋转主光路中的偏振片来模拟入射光的偏振方向和强度变化,实验验证了分光比的变化规律。

The formulas of transmitting and reflecting intensities formed by beam splitter were derived considering the polarization and intensity variations of the incident beam with the energy flow analyzing method. Experiment is finished by rotating the polarizer behind the lasersource so as to simulate the variation of laser intensity and polarization. The theoretic analysis is in accord with experimental results.