粗糙铝表面光谱偏振BRDF的测量与建模

摘要：

金属铝在航空航天、军事国防、电子通信等领域具有重要应用,对铝材料表面光谱偏振散射特性的研究有助于丰富材料的光学信息,能够为铝材料的应用提供数据支撑.首先基于一套传统双向反射分布函数(bidirectional reflectance distribution function,BRDF)测量装置在近红外波段测量了粗糙铝表面的光谱偏振BRDF,并分析了入射天顶角、粗糙度等因素对测量结果的影响.测量结果表明:入射角、波长、偏振态和表面粗糙度对BRDF有显著影响.其次,分别采用Beckmann分布和指数分布概率密度分布函数建立了BRDF模型,并对实验结果进行了拟合.通过对比能够发现:对于同一样品和相同入射条件,不同的模型能够得到不同的拟合结果;对于不同粗糙度的样品采用不同的模型可能得到更好的拟合结果.

Aluminum plays a vital role in aerospace,military defense,electronic communication,and other fields.Investigating the spectral polarization scattering characteristics of aluminum materials enriches the understanding of their optical properties and aids in providing data support for their applications.In this paper,the spectral polarization BRDF(bidirectional reflectance distribution function)of rough aluminum surface is measured in near infrared band based on a set of traditional BRDF measuring device,and the effects of incident zenith angle and roughness on the measurement results are analyzed.The results shows that the incidence angle,wavelength,polarization state and surface roughness have significant effects on BRDF.Additionally,the BRDF model is established by employing the Beckmann and exponential probability density functions,which are used to fit the experimental results.By compared with different models,it can be found that different models can get different fitting results for the same sample and incident condition.Better fitting results may be obtained by using different models for samples with different roughness.

作者：

刘彦磊 刘子龙 周孝好

Liu Yanlei;Liu Zilong;Zhou Xiaohao(Center for Metrology Scientific Data and Energy Metrology,National Institute of Metrology,Beijing 100029,China;Shanghai Institute of Technical Physics,State Key Laboratory of Infrared Physics,Chinese Academy of Sciences,Shanghai 200083,China)

机构地区：

中国计量科学研究院国家计量科学数据与能源计量中心 中国科学院上海技术物理研究所

引用本文：

《betway官方app 学报（自然科学版）》 CAS 北大核心  2024年第3期113-118,I0004-I0006,共9页

Journal of Henan Normal University(Natural Science Edition)

基金：

红外物理国家重点实验室开放课题(SITP-NLIST-ZD-2023-06).

关键词：

光谱偏振 铝 粗糙度 近红外 双向反射分布函数模型

spectral-polarized aluminum roughness near-infrared BRDF model

分类号：

O433 [机械工程—光学工程] 

粗糙铝表面光谱偏振BRDF的测量与建模.pdf