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基于粗糙度形貌数据的花岗岩表面双向反射特性研究

Keywords: 扫描,表面形貌,MonteCarlo法,双向反射特性

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Abstract:

利用原子力扫描探针显微镜(AFM)获得了花岗岩表面粗糙度形貌数据,分析了该实际表面的形貌特征.在几何光学近似下,根据该实际表面形貌数据采用MonteCarlo法,并考虑表面散射过程中的入射遮蔽及多次散射效应,模拟了实际表面的双向反射分布函数(BRDF).将BRDF'模拟值与在入射波长为O.6328μm、不同的入射天顶角和入射平面内条件下实验测得的BRDF值进行比较,结果表明在适当的误差范围内两者符合较好.

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