为分析激光测距机发射光学系统透射特性对测距性能的影响，利用光线追迹公式和部分偏振光理论，得出了激光测距机发射光学系统透射率的定量解析式。针对发射光学系统特例，定量分析了其透射率与入射激光束偏振参量和几何光学参量间的关系。结果表明：随着入射角增加，激光束偏振参量对发射光学系统透射特性将产生较明显影响，当激光器发射的激光脉冲是随机的部分偏振光时将引起测距机发射激光脉冲能量的随机变化。

In order to analyze the impact of the transmission of the LRF (laser range finder) optical transmitting system on the ranging performance, the quantitative analytical formula for the transmission of the LRF optical transmitting system was obtained by using the ray tracing equation and partially polarized light theory. The dependence of the transmission of a given optical transmitting system on the polarization parameters of incident laser beam and geometric optical transmitting system is analyzed quantitatively. The results show that the influence of polarization parameters on the transmission characteristics of the transmitter optics is enhanced if incident angle increases, and the energy of laser pulse emitted by LRF changes randomly if the pulse laser emitted by the transmitter is random partially-polarized light.