目标表面可见光谱BRDF的实验测量及优化建模  

Experiment measurements and optimal modeling of goal surface's visible spectrum BRDF

作　　者：王安祥[1] 张涵璐[2] 吴振森[2] 冯健[3] 曾震超[2] 

机构地区：[1]西安工程大学理学院,西安710048 [2]西安电子科技大学理学院,西安710071 [3]中国电波传播研究所,山东青岛266071

出　　处：《光学技术》2008年第5期655-658,共4页Optical Technique

基　　金：国家自然科学基金资助项目(40474061)

摘　　要：介绍了一种用双向反射分布函数测定仪进行目标双向反射分布函数测量的方法。运用该测量系统在可见光谱区域对样片进行了实验测量,然后对BRDF实验数据进行谱积分预处理,结合BRDF五参数半经验统计模型,利用遗传模拟退火算法,获取样片的BRDF模型参数,并获得了三维空间的BRDF分布。结果表明,获得的可见光谱BRDF模型能准确反映材料的光散射特性,符合工程要求。A method for the measurement of light scattering characteristics of the target sample is proposed. Using the system, an experiment is made on the surface of target sample under the visible light band. Based on the BRDF experimental data, the spectrum integral of target sample＇ s visible spectrum BRDF can be processed. Through the Genetic Simulated Annealing Algorithm, the parameters of statistic model are obtained and the 3-D BRDF distribution are structured. The experimental result indicates that this method is feasible to analyze the scattering characteristics of the sample.

关 键 词：双向反射分布函数 可见光谱 遗传模拟退火算法 谱积分 

分 类 号：O436.2[机械工程—光学工程]