介绍了非共轴激光雷达几何因子的物理意义,通过数值模拟分析了激光雷达各系统参数包括:激光发散角、接收视场角、光轴间距、光轴失调夹角对几何因子的影响。结果表明:光轴离轴失调对激光雷达影响最大,在系统设计时应极力避免。结合自行研制的CSY2型能见度激光雷达,将理论计算与实验测量值进行对比,实验结果表明两种计算结果基本一致。 The physical meaning of geometric factors of non-coaxial laser lidar is introduced. The system parameters of laser lidar are analyzed by numerical simulation including the influence of laser divergence angle, receiving angle of view, optical axis spacing and optical axis misalignment angle on geometric factors. The results show that the off-axis misalignment has the most influence on the Lidar and should be avoided in the system design. Combined with self-developed CSY2 visibility laser radar, the theoretical calculation and experimental measurement values ​​are compared. The experimental results show that the two calculation results are basically the same.