基于退偏振特性分辨伪装涂层的研究

伪装技术作为现代战争中一种重要的作战方式，在战场上起着至关重要的作用，对伪装目标的探测直接影响到战争的结果，利用退偏振特性检测伪装涂层的研究未见报道，因此对伪装涂层退偏振特性的研究具有重要意义。为了研究这一问题，从电磁波散射的机理出发，研究了其与退偏振特性之间的理论关系，利用琼斯矩阵和穆勒矩阵建立物理模型，结合偏振特性分解穆勒琼斯矩阵，得到被测量样品表面的完全退偏振系数(ω_d)。实验分别通过七个不同的入射角度对土壤与三种黄色伪装涂层进行测量，分析了土壤和三种黄色伪装涂层表面的退偏振特性，最后应用菲涅尔方程验证理论模型。分析可知：被测量样品表面的退偏振特性与表面散射程度相关，并且随着入射角度的增大，被测量样品的完全退偏振系数(ω_d)均呈递减趋势，但是在整个测量过程中，土壤与三种伪装涂层的完全退偏振系数(ω_d)具有很大的差异。研究表明：首次引用完全退偏振系数作为伪装目标分辨的重要参量，精确有效地分辨出土壤背景中的黄色伪装涂层，并且实验操作过程简单，周期较短，在现代战场上可以方便快速地识别出伪装目标，为战斗的胜利赢得了宝贵的时间，具有极大的应用价值，对伪装识别技术的发展有着极为重要的意义。

Study on the Distinguishment of Camouflage Paints Based on Depolarization Characteristics

As an important part in the modern warfare,camouflage technology plays a critical role in the battlefield,and the re-sults of detection of camouflage target directly affect the results of war.However,there is little paper to detect camouflage paint by depolarization characteristics,so it is of great significance to use the depolarization technology to study the distinguishment of camouflage paints.To address this issue,we studied the mechanism of the scattering of electromagnetic wave,and analysed the relationship between the characteristics of depolarization and mechanism of scattering.Jones Matrix and Mueller Matrix were used to set up the physical model,and the Mueller-Jones Matrix was decomposed with the characteristics of polarization,then the depolarization coefficients(ωd )of the surfaces of the samples was acquired.In this experiment,we measured soil and three kinds of camouflage yellow paints in seven different incident angles to analyze the characteristics of depolazation of the soil and three kinds of camouflage yellow paints’surfaces.Finally,we applied the theory of Fresnel formulas to verify the theoretical model.The results showed that:the depolarization coefficients of the samples’surfaces were related to the scattering,and with the increase of the incident angles,the depolarization coefficients were decline.But in the whole measurement process,the depo-larization coefficients of the soil were far above the camouflage paints’.Research indicated that:this article was the first paper which used the depolarization coefficients as an important parameter to identify the camouflage targets,and could identify the camouflage yellow paints in the soil-background accurately and effectively.The processes of the experiments were simpler,and the time was shorter.In modern battlefield,it could identify the camouflage targets quickly and easily,and furnish the precious time for the victory of the war.Therefore,the depolarization technology had a great application value,and the paper had very important significance on the development of camouflage recognition technology.