双向反射分布函数(BRDF)有效地描述了材料表面的空间反射特性和光谱特性。分析了BRDF的不同测试方法。研制了双向反射率测试实验台。分别用He-Ne激光器和YVO_4固体激光器,对1500CCR/RC.S.G防水研磨金刚砂在反射天顶角-15°～55°范围进行了测试研究。最后提到了要精确测量BRDF所面临的困难。

The spatial reflected characteristic and spectral characteristic from optical material surfaces were effectively described by the BRDF (Bi-directional Reflectance Distribution Function). The several measuring methods of the BRDF were analysed. A experimental table for the BRDF measuring was developed. With He-Ne laser and YVO4 solid laser, the measurements on 1500 CCR/RC.S.G silicon carbide waterproof abrasive paper were made within the -15°-65° of reflectance zenith angle. Finally, some difficulties in measuring BRDF precisely were mentioned.