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Transmitted and reflected scattering matrices from an English oak leaf

机译:英国橡树叶的透射和反射散射矩阵

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The complete Mueller matrix for an English oak (Quercus robur) leaf for a fixed azimuth angle (90°) was determined immediately after plucking and a day following exposure to normal room temperature and pressures. The Mueller matrices were determined for transmitted light at observation angles ranging from 0° to 24° and for reflected backscattering angles from 153° to 170°. All the measurements were taken with a He-Ne laser light source at 0.63 μm. Since positive eigenvalues were obtained for the coherence matrix, the polarimetric measurements were physically realizable. The anisotropy parameters were determined from the Jones matrices by use of the decomposition theorem. From the M_(33) and M_(44) components of the Mueller matrices, it was found that nonspherical structures within the leaf were primarily responsible for observed transmitted light scatter, and spherical structures were mostly responsible for observed backscatter. Variations in backscatter Mueller matrix elements from a fresh leaf to a second day of observation were assumed because of changes to water vapor concentration in the leaf.
机译:在拔毛后立即以及在暴露于正常室温和压力下的第二天,确定了固定方位角(90°)的英国橡树(Quercus robur)叶片的完整Mueller矩阵。确定穆勒矩阵的透射光在0°到24°的观察角和153°到170°的反射后向散射角。所有测量均使用0.63μm的He-Ne激光光源进行。由于获得了相干矩阵的正特征值,因此偏振测量可以物理实现。使用分解定理从琼斯矩阵确定各向异性参数。从Mueller矩阵的M_(33)和M_(44)分量中发现,叶内的非球形结构主要负责观察到的透射光散射,球形结构主要负责观察到的反向散射。假定由于新鲜叶片中水蒸气浓度的变化,从新鲜叶片到观察第二天的背向散射Mueller矩阵元素发生变化。

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    《Applied optics》 |2003年第24期|共8页
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