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激光双向反射分布函数(BRDF)数据测量是一种获得目标表面信息的重要手段。利用几何光学理论建立了目标表面BRDF模型,采用激光器、激光能量密度测量设备、转台、漫反射板等光电实验室常用测量设备,在相同的几何和物理条件下,分别测量样品和散射特性已知的漫反射板对激光能量的散射特性数据,推算出样品的BRDF数值;保持测量平面静止,通过翻转被照射表面获取样品表面的三维BRDF数据,推算了翻转过程中测量点的角度换算关系;利用测量结果,进行了目标表面BRDF模型的参数优化,建立了样品表面BRDF模型;实验环境容易构建,操作简便,为研究目标表面激光散射特性提供了一种新的研究思路。
Laser bidirectional reflectance distribution function (BRDF) data measurement is an important means of obtaining the information of the target surface. The target surface BRDF model was established by using the theory of geometrical optics. Samples and scattering properties were measured under the same geometrical and physical conditions by laser, laser energy density measuring equipment, rotary table, diffuse reflectometer and other common photoelectric measuring equipment. Of the diffuse reflection of the laser energy scattering characteristics of the data to calculate the sample BRDF value; keep the measurement plane stationary, by turning the irradiated surface to obtain the sample surface BRDF data to calculate the measurement point during the flip angle conversion; use of The parameters of BRDF model were optimized and the BRDF model was established. The experimental environment was easy to construct and easy to operate, which provided a new research idea for studying the laser scattering characteristics of the target surface.