NCJ Number
30974
Date Published
1971
Length
4 pages
Annotation
THIS PAPER DESCRIBES A SMALL INFRARED DETECTION DEVICE THAT WILL, UNATTENDED, SENSE THE PRESENCE OF AN INTRUDER BY HIS BODY HEAT ALONE AT DISTANCES OF SEVERAL HUNDRED FEET.
Abstract
THE AUTHORS DESCRIBE HOW THIS DEVICE CAN BE USED TO ACTIVATE CAMERAS, TELEVISION CAMERAS, MICROPHONES, AND OTHER SURVEILLANCE DEVICES.