激光引信云雾后向散射的偏振特性分析

针对激光在大气中传输时受到云雾的散射和吸收作用而影响激光引信的探测性能的问题,开展云雾对激光后向散射偏振特性的影响研究。利用Matlab对收发同轴窄视场模式下云雾对激光后向散射进行蒙特卡罗方法模拟,结果表明:不同粒子半径、不同能见度下云雾对激光后向散射的平均偏振度在0.08~0.25之间,与人造金属目标的偏振度之间存在较大的差异,可通过设定适当的阈值提高激光探测系统的抗云雾干扰能力。

Analysis on polarization characteristics of cloud and mist backscattering by laser fuze

As laser fuze is vulnerably interfered by scattering and absorption of cloud and mist,the influence of cloud and mist on polarization characteristics of laser backscattering is studied.The influence of cloud and mist on laser backscattering was simulated by Monte Carlo method under coaxial narrow-field mode.The results show that average degree of polarization of cloud and mist backscattering is 0.08~0.25 under different particle radius and visibility,and it is obviously different to man-made metal targets,so the anti cloud and mist interference ability of laser detection system can be improved by setting a proper threshold.