Polarization method for imaging through the water surface.

The possibility of improving imaging of the bottom of a water body by suppressing an inhomogeneous light background that occurs as a result of skylight reflection from the water surface and being superimposed on the bottom image is theoretically studied. It is shown that the radiance of this background can be reduced by a polarization filter and the correct choice of the imaging direction. It has been determined how the optimal directions of the bottom imaging with a Polaroid and without it depend on the Sun's position. The possibility of expanding the bottom swath by about 2 times due to joint use of its imaging facilities in polarized and nonpolarized light is proved. Photographs that demonstrate the effect of improving the bottom imaging with a Polaroid are presented.