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Water attenuation coefficient estimation with pulsed laser range-gated imaging system

Pulsed laser range-gated imaging system can reduce the influence of backscattered light in water. However, when searching for targets in unknown water, it is necessary to obtain the attenuation coefficient at the laser wavelength in the water. Usually, the attenuation coefficient of the water needs to be obtained by special instruments. In this paper, a numerical analysis method is proposed to extract the attenuation coefficient of water from the images collected by the range-gated imaging system. First, radiative transfer theory is used to model the imaging process of the pulsed laser range-gated imaging system. Then, the attenuation coefficient of the water is solved by numerical analysis method. At the same time, an experimental system is built to verify the method. The results under different water conditions show that, method in this paper is feasible and effective.