干湿状态对花岗岩表面双向反射特性影响实验研究  

EXPERIMENT STUDY ON THE BI-DIRECTIONAL REFLECTION PROPERTIES OF GRANITE SURFACE WITH DRY/WET STATES

作　　者：穆猷[1] 谢鸣[1] 刘林华[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2009年第3期495-497,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50836002)

摘　　要：实验测量了0.6328μm和1.34μm两种波段下花岗岩表面在干、湿条件下的BRDF.发现BRDF受表面干湿状态影响很大,润湿表面出现明显的镜反射分量。因花岗岩表面湿润程度不同,入射光在表面经历的反射过程大不相同。若表面形成一层稳定的水膜,该水膜在局部区域将起到半透明光滑界面的作用,导致材料表面的BRDF出现明显的镜反射分量。The BRDF of granite surface under dry and wetness states at the wavelength of 0.6328 μm and 1.34μm was measured by experiment. It was found that the dry and the wet states greatly affected surface BRDF, and the BRDF of wet surface appears obviously specular reflection component. The incident light goes through very different reflection process on the surface due to the change of wetness degree on granite surface. Once a stable water film forms on surfaces, it will act as translucent smooth interface in the local area of surface, and lead to the significant specular reflection component on the surface.

关 键 词：表面 湿润 双向反射分布函数(BRDF) 测量 

分 类 号：TK124[动力工程及工程热物理—工程热物理]