Detector-fitted camera provided with electronic protection

Details Detector-fitted camera provided with electronic protection Detector-fitted camera provided with electronic protection

1992-12-23

1995-02-07

Razavi, Michael T.

Television

Camera, system and detail

Solid-state image sensor

348297, H04N 5335

Patent

active

053879333

ABSTRACT:
In a system for the protection of cameras against countermeasures using, in particular, laser rays to saturate the sensors of the detector of the camera, each of the usual integration circuits connected respectively to the n sensors is preceded by an intermediate integration circuit, the contents of which are transferred into the usual integrated circuit at a rate higher than that used for the transfer of the contents of the usual integration circuit; the contents of the intermediate integration circuit are measured; the transfer of these contents is prevented when their value is excessively high. Application to detector-fitted cameras working in the infra-red, visible or ultra-violet ranges.

REFERENCES:
patent: 4397429 (1983-08-01), Fouilloy
patent: 4761652 (1988-08-01), Piroulli et al.
patent: 5038214 (1991-08-01), Miida
patent: 5113263 (1992-05-01), Audaire
patent: 5149969 (1992-09-01), Fouilloy
patent: 5216510 (1993-06-01), Amingual et al.
patent: 5233180 (1993-08-01), Tsuruta et al.

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