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Correction scheme for close-range lidar returns

机译:近距离激光雷达回波的校正方案

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摘要

Because of the effect of defocusing and incomplete overlap between the laser beam and the receiver field of view, elastic lidar systems are unable to fully capture the close-range backscatter signal. Here we propose a method to empirically estimate and correct such effects, allowing to retrieve the lidar signal in the region of incomplete overlap. The technique is straightforward to implement. It produces an optimized numerical correction by the use of a simple geometrical model of the optical apparatus and the analysis of two lidar acquisitions taken at different elevation angles. Examples of synthetic and experimental data are shown to demonstrate the validity of the technique.
机译:由于散焦的影响以及激光束和接收器视场之间的不完全重叠,弹性激光雷达系统无法完全捕获近距离反向散射信号。在这里,我们提出了一种根据经验估算和校正此类影响的方法,允许在不完全重叠的区域中检索激光雷达信号。该技术易于实现。通过使用光学设备的简单几何模型并分析在不同仰角拍摄的两个激光雷达采集,可以产生优化的数值校正。显示了合成和实验数据的实例,以证明该技术的有效性。

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