Appeal No. 2003-0312
Application No. 08/871,199 Page 7
From our review of Fouilloy, we find that Fouilloy is
directed to the field of optronic countermeasures, and
specifically relates to the protection of detector-fitted cameras
against dazzling, jamming or even destruction (col. 1, lines 6-
10). Fouilloy discloses that it is a known countermeasure of
detecting a camera through the reflection of a low powered laser,
and then aiming a high-powered pulsed laser to illuminate all or
part of the optical detector to dazzle or even damage the camera.
The lasers operate at a wavelength that is transparent to the
optical system of the camera. The dazzling is due to the
saturation of all or part of the sensor which make up the
detector, and results in images that are partially or totally
saturated. If the frequency of the pulses is faster than the
frequency of the images, then the saturation systematically
affects all of the images (col. 1, lines 10-25). A known way to
protect a camera from these countermeasures is to discriminate
between the narrow spectrum of this radiation and the wide
spectrum of natural sources, and to stop the frame scanning of
the camera during the duration of the disturbing laser (col. 1,
lines 27-32). In the summary of the invention, Fouilloy
discloses providing intermediate integration circuits, and
wherein the camera comprises measuring means to measure the
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