METHOD AND DEVICE FOR ACQUIRING, TELEMETRY AND REPRESENTING OBJECTS LOCATED IN DISORDERED MEDIA, USING LASERS

摘要

P METHOD AND DEVICE FOR ACQUISITION, TELEMETRY AND REPRESENTATION OF OBJECTS LOCATED IN A HIGHLY LIGHT-DISPERSING MEDIUM, THE SOURCE OF RADIATION BEING A PULSED LASER. THE BACK-BROADCAST SIGNAL ARRIVING TO THE PHOTORECEPTOR 11 IS TRANSMITTED TO A LOGARITHMIC AMPLIFIER 12 THEN ROUTED THROUGH TWO SEPARATE WAYS IN ONE OF WHICH THEY ARE DELAYED. A DIFFERENTIAL AMPLIFIER 14 SHAPES THE DIFFERENCE OF THE TWO LOGARITHM SIGNALS, THEN AN ANTI-LOGARITHMIC AMPLIFIER 15 SHAPES THE QUOTIENT "SIGNAL DELAYS WITHOUT DELAY". /P P FIELD OF APPLICATION: SEARCH AND LOCATION OF OBJECTS, FOR EXAMPLE VESSELS DIVING IN A VERY DISPERSITIVE AND ABSORBENT ENVIRONMENT. /P