粗糙表面激光散射的偏振依赖特性研究
该测量方法为认识各种材料的后向散射光特性提供了依据，对于激光探测领域的相关研究有一定的参考价值。
关键词 随机粗糙表面，后向散射，偏振测量，斯托克斯参量
毕业设计说明书（论文）外文摘要
Title The laser polarization scattering characteristics of the rough
surface
Abstract
The targets’ backscattering characteristics affect the performance of the laser radar directly, and also the research of these characteristics is very important to the system optimization of the laser radar or the laser rangefinder. On the basis of previous theories, we conducted the experiments on the targets' backscattering characteristics. These experiments mainly measured the Stokes parameters of backscattering lights and those devices of experiments worked in 905nm band. We mainly compared both P-polarized light and S-polarized light incidences three nickel alloy plates and several sandpaper with different roughness to analyze the effect of backscattering characteristics on different material, roughness and also different incident angle and different polarization light. We have the following conclusion: For the same surface, the polarization degree of backscattering light is higher when P-polarized light incidences. For the same material targets, the polarization degree is higher when roughness is lower. Compared with frosted glass, nickel alloy plates have stronger polarization characteristic. This paper did a preliminary summary of light's backscattering characteristics of several groups of different materials, different roughness surfaces, also the characteristics and the theories math pretty well. The data provide an understanding of the light's backscattering characteristics of rough surface, and have a certain reference value on the research of laser detection.
Keywords Random rough surface, Backscattering light, Polarization measure, Stokes parameters
目录
摘 要 I
Abstract II
1 引言 1
1．1 研究背景 1
1．2 国内外研究现状 2
1.2.1 粗糙表面激光散射偏振特性的理论研究 2
1.2.2 粗糙表面激光散射偏振特性的实验研究 3
1.3 本文主要工作 6
2 粗糙目标表面光散射的基本理论 7
2.1 随机粗糙表面的统计描述 7
2.2 随机粗糙表面的光散射理论 8
2.2.1 散射场和散射功率 8
2.2.2 散射系数和后向散射系数 10
3 典型目标退偏特性的测量原理和方法 15
3．1散射场偏振度和退偏度的定义 15
3. 2斯托克斯参量与光波的偏振态 16
3.2.1 斯托克斯参量的定义 16
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