Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1969-06-04
1977-09-20
Birmiel, Howard A.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358228, H04N 538
Patent
active
040500853
ABSTRACT:
A system to automatically regulate input light and television camera tube gain to maximize scene viewing continuity while protecting against overloads. An electro-optical input assembly, an image intensifier, SEC vidicon and video pre-amplifier produce required video signals. The signals are fed along a common path comprising a keyed clamp and field gating circuit, parallelly connected peak and average detectors, detector output weighting, amplifying and attenuator circuits. The path branches to a control function stage and a high voltage power supply to form a fast vidicon accelerating voltage adjusting loop. The path also branches to iris threshold and dead zone stages, to cause an iris motor to control the iris position in accordance with ambient durational and transient light conditions.
REFERENCES:
patent: 3086077 (1963-04-01), Mayer
patent: 3182125 (1965-05-01), Kampmeyer et al.
patent: 3389221 (1968-06-01), Macdonald
patent: 3555181 (1971-01-01), Thommen
Hansen Jay M.
Prince Paul R.
Skehan Bernard J.
Adam Walter J.
Birmiel Howard A.
Hughes Aircraft Company
MacAllister William H.
LandOfFree
Automatic light control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic light control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic light control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-674343