伪装材料的偏振散射光谱研究

采用多波段偏振CCD相机在光学与红外波段测试了镜面反射方向伪装材料的偏振特征.研究了不同入射条件下具有粗糙表面的伪装材料的偏振散射过程,得到了材料的偏振散射光谱.在镜面反射方向,伪装材料表面具有高的线偏振度,而草地背景的线偏振度很低.利用Kirchhoff近似理论分析了粗糙表面的偏振散射过程,分析结果与实验测试的偏振光谱相一致.由于伪装材料与背景的偏振散射光谱不同,因此利用偏振信息成像能够识别复杂背景中的伪装目标.偏振遥感在伪装目标识别方面具有重要的军事应用价值.

Study of Polarization Spectrum of Camouflage Materials

The polarization characteristics of a camouflage material in the direction of specular reflection are tested by using a multispectral polarization CCD camera in visible and infrared wavebands. The polarization characteristics of a camouflage material with rough sufaces are studied under different incident conditions and the polarization spectrum of the material is obtained. In the direction of specular reflection, high linear polarization is exhibited at the surfaces of the camouflage material and very low linear polarization is exhibited against the meadow background. The polarimetric scattering at the rough surfaces are analyzed by using Kirchhoffs scattering theory. The analysis result is in agreement with the measured polarization spectrum. Since the polarization scattering spectrum of the camouflage material is different from that of the background, the use of polarization information in imaging is very helpful to the identification of targets against complex background. Polarization remote sensing is of important value to the detection of camouflaged military targets.