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海洋激光雷达在探测水下目标时,其探测深度会受到波动水面的影响。对于光子在目标平面上的空间分布,已经成为研究的热点。而已有工作多集中在光子径向分布半径较小的情形,对于光子在目标平面大范围的扩散情形研究较少。基于蒙特卡罗方法,通过对比舍选抽样法和变换抽样法,光子径向分布半径较大的情形得以分析。结果显示,对于相同半径,光子径向相对能量分布与风速满足一定的规律。这说明,由于风速影响所产生的随机性并不是完全随机,也有一定的规律性。同时,舍选抽样法和变换抽样法的对比显示,变换抽样法作为一种近似,其结果没有舍选抽样法精确。
When detecting a submarine target, the depth of the oceanic lidar will be affected by the fluctuating surface. For the photon in the target plane of the spatial distribution, has become a research hotspot. However, the existing work mostly focuses on the case where the radial distribution radius of the photon is relatively small, and there are few studies on the diffusion of photons in the wide range of the target plane. Based on the Monte Carlo method, the radii of radial distribution of photons are analyzed by comparing the rounding sampling method and the translating sampling method. The results show that for the same radius, the photon radial relative energy distribution and wind speed meet certain rules. This shows that due to the impact of wind speed generated randomness is not completely random, but also a certain regularity. At the same time, the comparison between the sampling method and the transformation sampling method shows that the transformation sampling method is an approximation, and the result is not accurate.