针对目前激光近程探测时仅利用漫反射回波强度信息抗干扰能力差的问题,提出基于激光偏振特性的目标探测方法,对金属目标表面的激光偏振特性进行了分析,给出了偏振反射的模型,并对典型金属目标的表面偏振反射特性进行了仿真.通过对反射光Stokes矢量的分析表明,线偏振光或圆偏振光经过金属表面反射后变为椭圆偏振光,其椭圆度和方位角随金属材质的不同而呈现不同的变化规律,将反射的偏振特性作为区分不同材料目标的依据,可提高探测系统的抗干扰性能.

In view of that only the intensity information of retroreflection wave is used and the poor capacity of anti-interference in laser short-range detection, the polarization characteristics of laser beam on the metal target surface are analyzed and a reflection model of polarized laser is established. A target detection method based on polarization characteristics of reflection laser is putted forward and the simulation of polarization characteristics on the surfaces of several typical metal targets is conducted at last. By analyzing the Stokes vector of reflection laser, both of the linear polarized light and the circular polarized become elliptically polarized light after reflection and the elliptical angle and the azimuth angle vary with different metal materials. The polarization characteristics of reflection laser, which provide the basis for distinguishing targets with different materials, could improve the anti-interference capacity of laser short-range detection.