METHOD OF DETECTING DIFFUSIVELY REFLECTED OR DIFFUSIVELY SCATTERED LASER RADIATION Russian patent published in 2012 - IPC G01S17/06 

FIELD: physics.

SUBSTANCE: method involves passing optical radiation which is reflected from a surface or scattered through an optical system. Said radiation is the directed from the output of the optical system to a photoelectric receiver. The photoelectric receiver is outside the focal plane of the optical system. A beam of reflected or scattered optical radiation is scanned relative the photoelectric receiver. The signal from the photoelectric receiver is transmitted to a processing unit and presence of minimum or maximum signals from separate elements of the photoelectric receiver is determined from presence of coherent radiation in the analysed beam.

EFFECT: detection of hidden exposure of surfaces of monitored objects with coherent radiation.

3 dwg