Automatic exposure and gain control for a sensor using video fee

Details Automatic exposure and gain control for a sensor using video fee Automatic exposure and gain control for a sensor using video fee

1996-09-26

1999-09-28

Garber, Wendy

Television

Camera, system and detail

Combined image signal generator and general image signal...

348217, 348364, 348372, H04N 5235, H04N 5225, H04N 5238, H04N 5222

Patent

active

059596686

ABSTRACT:
An apparatus for viewing dimly illuminated and rapidly changing scenes includes a sensor assembly which generates a video signal. The apparatus further includes a controller which receives the video signal for comparison to a desired average video value whereupon the controller adjusts at least one adjustable variable contained within the sensor assembly. The sensor assembly includes a lens which has an adjustable iris and an image intensification tube which includes a photocathode and a micro-channel plate. The photocathode has an adjustable photocathode gate pulsewidth and the micro-channel plate has an adjustable micro-channel plate gain. A strobe is also provided to illuminate the scene viewed by the sensor assembly wherein the strobe is connected to a processor which is also connected to the controller. The controller determines what the ambient light level is to be at the next illuminated or non-illuminated scene and adjusts the adjustable variables accordingly.

REFERENCES:
patent: 4603250 (1986-07-01), Contini et al.
patent: 4851914 (1989-07-01), Pfanhouser et al.
patent: 5001552 (1991-03-01), Okino
patent: 5027215 (1991-06-01), Takayama et al.
patent: 5473374 (1995-12-01), Shimizu et al.
patent: 5563653 (1996-10-01), Floryan
patent: 5606392 (1997-02-01), Tintera et al.

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