利用表面散射光偏振差异的目标识别技术
Application of polarization diversity in active imaging
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摘要: 分析了不同物体散射场偏振特性的差异，依据消光定理的矢量微扰解方法将物体散射场分为零阶和高阶解，零阶反射光可完全保持入射光的偏振度，高阶散射则会导致偏振度的降低，因而总散射光的偏振度依赖于散射表面的粗糙程度。提出了利用斯托克斯-穆勒体系测量物体消偏特性的方法并通过实验对一些物体作了测量，实验结果表明：光滑表面可以较好地保留入射光偏振度，而粗糙表面则有很强的消偏作用，因此偏振成像方法可有效地提高目标探测和识别效率。Abstract: The polarization diversity of laser scattering field is studied in this paper.According to the vector small perturbation solution of extinction theorem,the scattering field from rough surfaces is classified as the zero order or higher order solution. When the light incident is linearly polarized, the polarization degree of reflected light is 1, the scattering light is partial polarized and changes of polarization degree have relation to the observational plane. Stokes-Muller system is used to measure the depolarization matrices of different surfaces. The results show that the slick plane can keep polarizability of incident linearly polarized light and rough plane will result in polarization loss. Long distance imaging experiments show polarization diversity active imaging can increase dete
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Key words:
- polarization /
- target identification /
- laser scattering field /
- muller matrix /
- active imaging
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