基于偏振散射特性的仿生植被识别方法研究

Study on the method of biomimetic vegetation recognition based on polarization scattering

为了研究仿生植被涂层的检测问题,从电磁波的偏振特性出发,研究了平面单色波的斯托克斯矢量与空间几何参数和相位参数之间的几何含义,利用偏振椭圆及其几何参数建立了物理模型,结合电场矢量方程,得到了被测量样品表面的振幅比(K)、相位延迟(δ)和偏振度(P)。分别通过7个不同的测量角度对樟树树叶和3种绿色仿生涂层进行实验,利用测量数据分析了4种物质表面的偏振散射特征,最后应用菲涅尔方程验证理论模型。

In order to study the detection of biomimetic vegetation coating,the geometrical meaning between the Stokes vector of planar monochromatic wave and the spatial geometric parameters and phase parameters was studied from the polarization characteristics of electromagnetic waves.The physical model was established by using the polarization ellipse and its geometric parameters.Combined with the electric field vector equation,the amplitude ratio(K),phase retardation(δ)and degree of polarization(P)of the surface of the sample to be measured were obtained.The eucalyptus leaves and three green biomimetic coatings were tested by seven different measuring angles.The polarization scattering characteristics of the four materials were analyzed by using the measured data.Finally,the Fresnel equation was used to verify the theoretical model.