人工微结构材料在激光照明条件下的散射特性研究

发布时间：2018-06-28 12:11

本文选题：偏振特性 + 散射特性　；参考：《长春理工大学》2017年硕士论文

【摘要】：目标散射特性的研究是材质识别和探测的基础,对于低反射人工微结构材料,根据双向反射分布函数(BRDF)和偏振度的基本理论,建立散射特性的研究方案,并搭建了人工微结构材料在激光照明条件下的测量系统。本文选用黑硅和黑金属铝为被测材料,测量了材料表面散射光的散射场分布和偏振特性,同时又分析了不同微结构产生偏振波动的机理,从而实现对黑硅和黑金属铝的鉴别和区分。本文结果表明,微结构材料表面散射光的散射场分布虽然与随机粗糙表面的散射场分布有较大的不同,其BRDF值随着测量参量的变化而变化,但不同的微结构材料的散射场分布相似,且反射值较低。反之,对于不同的微结构材料表面散射光的偏振能力在数值和分布上均具有明显的差异性。散射光的偏振曲线随着入射角和接收角的改变而产生变化,同时出现波峰和波谷,其幅度存在差别,并且黑金属铝的偏振能力强于黑硅,表现两种微结构材料的差异性。本文结果为人工微结构材料的探测与识别研究提供一定的理论和实验依据,同时也可对人工微结构材料在隐身、探测等领域中的应用提供一定参考。
[Abstract]:The study of scattering characteristics of targets is the basis of material identification and detection. According to the basic theory of bi-directional reflectance distribution function (BRDF) and degree of polarization, the research scheme of scattering characteristics is established for low reflectance artificial microstructure materials, which is based on the theory of bidirectional reflectance distribution function (BRDF) and degree of polarization. The measurement system of artificial micro-structured materials under laser illumination is also built. In this paper, the scattering field distribution and polarization characteristics of scattering light on the surface of black silicon and black metal aluminum are measured, and the mechanism of polarization fluctuation in different microstructure is analyzed. Thus, the identification and differentiation of black silicon and black metal aluminum can be realized. The results show that the distribution of scattering field on the surface of microstructured materials is different from that of random rough surface, and the BRDF value varies with the change of measurement parameters. However, the scattering field distribution of different microstructures is similar and the reflection value is low. On the contrary, the polarization ability of scattering light on the surface of different microstructure materials has obvious difference in numerical value and distribution. The polarization curve of scattered light varies with the change of incident angle and receiving angle, and the amplitude of wave peak and trough is different. The polarization ability of black aluminum is stronger than that of black silicon, which shows the difference between the two kinds of microstructural materials. The results of this paper provide a certain theoretical and experimental basis for the detection and identification of artificial microstructural materials, and can also provide a certain reference for the applications of artificial microstructural materials in the field of stealth, detection and other fields.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN249;O436.2

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