Apparatus for detection of an enemy's infrared camera

Details Apparatus for detection of an enemy's infrared camera Apparatus for detection of an enemy's infrared camera

1984-05-29

1986-05-20

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250330, 250341, 250338, G02F 129, G01J 510, G01S 1774

Patent

active

045903751

ABSTRACT:
Apparatus for the detection of an enemy infrared camera. This apparatus includes a continuous infrared laser 1 directed towards camera 25, a receiver 10 of the infrared signals sent by the camera, a processing circuit 23 of these signals, able to determine a delay time, a delay circuit 22 supplying electrical signals delayed by the said delay time in relation to the reception of infrared signals, and a pulsed laser 16 sending to camera 25 laser pulses respectively on reception of the delayed signals. The apparatus causes a very bright spot to be created on the camera screen which represents a picture of a dummy object displaced by a predetermined distance from the apparatus. This spot overshadows the spot on the screen corresponding to the true location of the apparatus.
Application is for detection of an enemy infrared camera placed on a tank.

REFERENCES:
patent: 2989744 (1961-06-01), Pettit
patent: 3891989 (1975-06-01), Barney et al.
patent: 3946233 (1976-03-01), Erben et al.
patent: 4112300 (1978-09-01), Hall, Jr.
patent: 4286498 (1981-09-01), Block et al.

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