Combined spatial and temporal processing techniques are presented to enhance optical ranging in underwater environments. The performance of underwater light detection and ranging (lidar) is often limited by scattering. Previous work has demonstrated that both hybrid lidar–radar, which temporally modulates the amplitude of light, and optical spatial coherence filtering, which spatially modulates the phase of light, have independently reduced the effects of scattering, improving performance. The combined performance of the processing methods is investigated, and experimental results demonstrate that the combined filtering improves the performance of underwater lidar systems beyond what either method provides independently.

中文翻译：

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水下激光雷达的时空域滤波

提出了组合空间和时间处理技术，以增强水下环境中的光学测距。水下光探测和测距（激光雷达）的性能通常受到散射的限制。先前的工作表明，混合激光雷达-雷达（对光的振幅进行时间调制）和光学空间相干滤波（对光的相位进行空间调制）都独立地降低了散射的影响，从而提高了性能。研究了处理方法的组合性能，实验结果表明，组合滤波提高了水下激光雷达系统的性能，超出了任一方法独立提供的性能。