光束入射角对角锥合作目标激光测距的影响

Effect of Beam Incident Angles on Trihedral Corner Reflector Laser Ranging

为了掌握光束入射角对角锥合作目标激光测距接收功率的影响规律,分析了光束入射角和角锥棱镜反射器有效反射面积的关系,利用有效反射面积推导了角锥棱镜反射器的激光雷达横截面(LRCS)随光束入射角变化的理论公式,进而得到激光测距系统接收功率随光束入射角变化的规律。理论分析及仿真结果表明,接收功率随入射角增大而减小,在最大允许入射角处发生突变,并且角锥反射器的最大允许入射角理论值为±54.74°。

In order to describe the relationship between the incident angle of trihedral corner reflector and the received power of laser ranging system, the relationships between the beam incident angle and the effective reflective area of trihedral corner reflector is analyzed. The formula of the laser radar cross sections（LRCS） of trihedral corner reflector varying with the beam incident angle is derived according to the effective reflective area. Accordingly,the relationship between the received power of laser ranging system and the beam incident angle is gotten. Theoretical analysis and simulation results indicate that the received power reduces as the incident angle increases. When the incident angle is up to maximum,the received power proliferates. The max incident angle is ±54.74°.