利用极化信息实现目标重构的算法研究

本文研究了一个光滑的、理想导电的、凸散射体的轮廓重构问题。主要从物理光学散射场的一阶修正项入手,分析了散射场的共极化和交叉极化信息与目标表面形状之间的关系,获得了散射场的极化特性与散射体表面上镜面点的主曲率密切相关的概念。借助于微分几何中曲面再现问题,重构出目标的外形图象。

TARGET RECONSTRUCTION WITH POLARIZATION-DEPOLARIZATION INFORMATION

This paper deals with the reconstruction of a surface profile as a smooth, convexshaped, perfectly conducting target. Starting with the investigation of the first order correction to the physical-optics approximation, the relationship between polarization-depo- larization information and the surface profile of the scatterer has been analysed. A concep-tion that the polarization chrarcteristics of the scattered field by the scattering surface is related to the local principal curvatures has been acquired. Based on the problem of differential geomotry, the reconstruction of the surface profile of the scatterer has been abtained.