不同涂层飞机蒙皮半球空间激光偏振特性

Hemishere Space Laser Polarization Characteristic of Aero Different Coat Cover

准后向测量不能反映目标半球空间的散射特性,只能描述后向小区域内的散射特性,偏振成像应用于引信探测尚难已实现,针对激光引信对空中目标空间激光偏振特性探测需求,提出了采用散射光强和消偏比来描述飞机蒙皮涂层激光偏振散射特性,并基于双向反射分布函数测量系统对飞机基底材料碳纤维、铝不同涂层样品的半球空间激光偏振散射特性进行测量。测试结果表明:飞机蒙皮样品激光偏振散射光强、消偏比和涂层颜色密切相关,与基底材料基本无关,即样品表面是面散射,单一入射角时偏振散射光强主要集中在镜向且镜向消偏比最小。

Semibackside measurement can only describe scattering characteristic in a small back area, not for the hemishere space, it is hard to use polarization imaging for fuze detection. Aimming at target space laser polarization characteristic detection need of laser fuze in space, it is raised to describe laser polarization characteristic of aero different coat cover by scattering intensity and clear polarization scale, and hemishere space polarization characteristic of carbon fibre, aero aluminum floor and different coat cover is measured based on bidire-flection distributing function（BRDF）system. The result shows that areo cover＇s polarization scattering intensity and clear polarization scale are correlative with coat color nearly, not the floor material, means that the test sample＇ s scattering is area, under single angle of incidence, scattering intensity is enantiomorphous mainly, and clear polarization scale is least.