光学技术, 2016, 42 (3): 242, 网络出版: 2016-06-06  

基于双向反射分布函数的目标激光测距方程

Research on laser ranging equation of the target based on bidirectional reflectance distribution function
刘恺 *
作者单位
工业和信息化部软件与集成电路促进中心, 北京 100038
摘要
导航系统中广泛采用激光测距确定星地间距离, 双向反射分布函数可精确描述实际物体反射光的情况, 是研究激光测距方程的有效手段。结合目标反射几何模型, 计算得到透镜各点接收目标反射光强的表达式。对目标光斑和接收透镜进行网格划分, 仿真得到透镜面元接收目标反射的光强分布和透镜接收的瞬时光强, 并讨论了平面目标的网格步长选取和计算次数。当光束从不同空间位置入射至平面目标表面时, 根据探测器-反射棱镜之间距离与接收光强的对应关系得到激光测距方程的待定参数。实测数据验证了理论计算的正确性。
Abstract
Laser ranging is widely used to range the distance between thesatellites and the ground stations in the navigation system.Bidirectional reflectance distribution function can be used to describe the light reflection of real objects, and it is an effective mean to the research of the laser ranging equation. The reflected intensity on the point of received lens is calculated combining the bidirectional reflectance distribution function and the geometric model of target reflection. Meshing on the target flare and the received lens, the received intensity distribution of one lens element and the received instantaneous intensity of the whole lens are obtained by emulations. The mesh spacing and the amount of calculation of the planar target are also discussed. The undetermined coefficients in the laser ranging equation are computed based on the relations of the distance from the target to the sensor and the received intensity in different incident angles.The theoretical results are verified by the experimental data.

刘恺. 基于双向反射分布函数的目标激光测距方程[J]. 光学技术, 2016, 42(3): 242. LIU Kai. Research on laser ranging equation of the target based on bidirectional reflectance distribution function[J]. Optical Technique, 2016, 42(3): 242.

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