2.7 - Underwater optical range gating

The applicability of underwater optical range gating, designed to extend the range of underwater visibility, was demonstrated in a series of experiments. With black tape patterns on a Scotchlite background as the target, comparison photographs of gated and nongated exposures illustrated the feasibility of extending the range of underwater photography by reducing the intermediate veiling luminance caused by backscattered light. Theoretical and experimental results of these tests are presented.