Chua Sing Yee, Wang Xin, Guo Ningqun, Tan Ching Seong
Appl Opt. 2016 Jan 1;55(1):153-8. doi: 10.1364/AO.55.000153.
Range determination has crucial dependency of intensity over distance due to the fact that output of a range gated system is the reflectivity and range information expressed in term of intensity. From our experimental study, the analyzed trend line of reflected intensity versus range agrees with the theoretical model where it underlies an inverse range-squared dependency. Considering the energy attenuation factor for a better three-dimensional (3D) solution, a range compensation model is derived based on time slicing technique to compensate the effect imposed by distance beyond an optimum range. A range gated imaging system with pulse profile feedback is proposed in order to apply the range compensation model. Experimental results show noticeable improvement as compared to the conventional weighted average method for reflected laser pulse data across different ranges and 3D surface reconstruction using the proposed range compensation model.
由于距离选通系统的输出是用强度表示的反射率和距离信息，因此距离测定对强度与距离的关系有着至关重要的依赖性。从我们的实验研究来看，反射强度与距离的分析趋势线与理论模型相符，该理论模型基于距离平方反比关系。考虑到能量衰减因素以获得更好的三维（3D）解决方案，基于时间切片技术推导了一个距离补偿模型，以补偿超出最佳距离的距离所带来的影响。为了应用距离补偿模型，提出了一种具有脉冲轮廓反馈的距离选通成像系统。实验结果表明，与传统的加权平均方法相比，对于不同距离的反射激光脉冲数据以及使用所提出的距离补偿模型进行的3D表面重建，有显著的改进。
