偏振探测有利于改善对目标的探测和识别能力, 是当前国内外研究的重要内容之一。介绍了长波红外高光谱偏振测量的原理, 并通过搭建长波红外高光谱偏振测量系统, 开展了对涂漆目标和镀铝目标在不同温度、不同观测角度下的高光谱偏振成像实验, 获取了有效的实验数据并进行处理分析。结果表明: 温度和观测角度对目标的光谱偏振特性有较大影响, 目标表面的红外光谱偏振特性随辐射温度差值及探测角度差值的增大而增大, 并具有波段选择性。利用目标温度和观测角度的差异对目标光谱偏振特性的影响, 可以进行有效的探测与识别, 并为探测器的波段选择提供参考依据。

The technique of polarization detection helps improve the ability of detecting and identifying target, which is currently one of the important contents of the research at home and abroad. The measuring principle of infrared hyperspectral polarization was introduced. The measuring system of long wave infrared hyperspectral polarization was set up. The measuring experiments of polarization characteristic of paint-coating and aluminum-plating target at different temperatures and observing angles were carried out. The effective experimental data was obtained and analysed. The results show that: the spectral polarization characteristic of the target is influenced by temperature and observing angle; the more the difference of temperature and observing angle of the target is, the more the spectral degree of polarization is; the spectral degree of polarization has band selectivity. The effective detection and identification is developed based on the difference of temperature and observing angle of targets. The above results provide reference for band selectivity of the detector.