LASER DEVICE FOR MONITORING OF EFFICIENCY OF MEASURES TAKEN FOR PROTECTION OF ROOMS AGAINST UNAUTHORIZED PICKUP OF VOCAL INFORMATION Russian patent published in 2004 - IPC

FIELD: protection of rooms against unauthorized pickup of vocal information. SUBSTANCE: the laser device has a forming receiving optical system that is optically connected to the input of the receiving active optical fiber whose output is electrically is connected to the input of a photodetector electrically whose output is connected to the input of the information listening unit via series-connected second amplifier, demodulator, amplifier. The laser output is optically connected to the input of the transmitting active optical fiber, whose output is optically connected to the forming transmitting optical system. The optical glass with a reticule is mechanically connected to the forming transmitting and receiving optical systems, and the power unit is connected to the inputs of the photodetector, second amplifier, demodulator, amplifier, information listening unit. The device body may be made in the form of a rim of glasses. EFFECT: expanded functional potentialities of the device and enhanced operativeness of estimation of the efficiency of the measures taken. 2 cl, 2 dwg