为了对离轴激光雷达的近场信号进行校正,本文根据离轴激光雷达重叠因子的定义,利用高斯光束光强的解析传输公式,并考虑到离轴激光雷达系统激光分布与望远镜视场的五种关系,得到了利用雷达系统参数表示的离轴激光雷达重叠因子的解析计算公式。基于该公式对澳门地区雷达回波信号进行了校正和反演,所得结果证明了解析公式的有效性。利用解析公式通过数值计算方法详细研究了雷达系统参数对离轴激光雷达重叠因子的影响,该结果对激光雷达系统设计具有一定的参考价值。

In order to correct the near-range signal of off-axis Lidar,according to the definition of overlap factor,using the intensity propagation equation of Gaussian beam,and considering the five relationships between laser beam distribution and telescope field of view,we obtain the analytical formula of the overlap factor of an off-axis lidar,which is expressed as a function of the lidar system parameters.Based on the formula the lidar return signal in Macao is corrected and retrieved.The result shows the validity of the formula obtained in the paper.The influence of the lidar system parameters on the overlap factor is studied numerically by using the analytical formula.And a result is obtained,which is of reference value to the design of a laser lidar system.