Underwater Laser Viewing System

The difficulty of viewing through turbid water due to obstruction from backscattered rays is overcome by adopting the range gate camera, which is actuated only during the interval when useful laser pulsed laser beam. Experiments are performed to seek the dependence of laser ray attenuation in water on wavelength, on water turbidity and on suspended particle size. Results of trial runs prove appreciable improvement of image quality to be obtainable with the laser viewing system. Simulation is applied to fill the gaps between discrete points determined by experiment to obtain optimum values for the parameters governing the viewing system.