APPARATUS FOR VIEWING OBJECTS IN TURBID OPTICAL MEDIA Russian patent published in 2012 - IPC G01S17/88 

FIELD: physics.

SUBSTANCE: apparatus has, in a sealed housing with optical windows, a transmitting channel formed by series-arranged, towards the object, a laser light source, a telescope, a laser beam scanning device, an output optical system and a main receiving channel, directed from the object, formed by the an input optical system, having polarisation and interference filters and a lens, a photodetector with a gating unit, an amplifier and a peak detector, wherein the transmitting and main receiving channels are connected to an automatic information control and processing system. The apparatus includes an additional receiving channel having the same composition as the main receiving channel, wherein polarisation filters of the input optical system of the main and additional receiving channels extend into the medium outside the sealed housing in front of corresponding channels of interference filters, wherein the polarisation plane of the polarisation filter of the additional receiving channel is turned relative the polarisation plane of the polarisation filter of the main receiving channel. Also, in the device, the polarisation plane of the polarisation filter of the additional receiving channel is orthogonal to the polarisation plane of the polarisation filter in the main receiving channel.

EFFECT: longer range of vision, improved contrast and resolution of the image, easier work of the operator and simple design of the sealed housing.

4 cl, 1 dwg