微粗糙光学基片表面与上方冗余粒子的差值场散射特性研究

Study on Difference Field Scattering Properties between Slightly Rough Optical Surface and above Redundant Particles

基于小波距量法(MOM)研究了微粗糙光学基片表面与上方冗余粒子的差值光散射特性。从基本电场积分方程出发,推导出冗余粒子目标与光学基片微粗糙面的积分方程,得到阻抗矩阵,进而推导出散射耦合场及差值场,给出复合散射模型双站散射截面的计算公式,数值计算并分析了不同入射角度,不同材质的单个及双个冗余缺陷粒子与微粗糙光学基片表面的双站散射截面及差值双站散射截面的散射角分布,给出冗余粒子及微粗糙面的散射贡献及差值场散射角分布。

Based on the wavelet method of moment （MOM）, difference field scattering properties between slightly rough optical surface and redundant particles above are researched. The integral equations about slightly rough optical surface and redundant particles are presented from basic electric field integral equations. Impedance matrix, composite scattering field and difference scattering field are obtained. Bistatic radar cross section calculation formula of the composite scattering model is given. Bistatic radar cross section and difference bistatic radar cross section are analyzed between different material one/double redundant particles and slightly rough optical surface with different incident angle and numerical experiments are shown. The scattering contribution and difference field scattering angular distribution of the redundant particles or rough optical surface are provided.