Optical signal intruder detection system, having intense pulse source/target broadcast diffuser multiple photon rays providing and different position detectors detecting signal change

摘要

The intruder detection system has a source of intense pulses (1) passing to a broadcast diffuser (2), forming an umbrella of photon rays in three dimensions. A number of detectors (3) in different locations detect the optical signal. A variation in the optical signal sets the intruder alarm.