Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-02-21
1990-09-11
Brinich, Stephen
Facsimile and static presentation processing
Facsimile
Recording apparatus
358212, 35821311, H04N 314
Patent
active
049567160
ABSTRACT:
A system 10 for imaging radiation received from a scene provides for the focusing of the radiation upon a set of detectors 12. A set of amplifiers 14 couple the detectors to an image processor 24 for forming an image of the scene. The amplifiers are pulsed with a repeating sequence of pulses providing sequential operation of the amplifiers. The amplifiers and the detectors are constructed on a single substrate which is cyrogenically cooled for improved signal-to-noise ratio. Amplifying elements in each of the amplifiers are powered by energy stored as electric charges in capacitors. The capacitors are recharged with pulses from a pulsing unit repetitively in a repeating sequence of amplifier operation. The capacitors provide for integration of detector signals, there being additional integration performed at the front end of each of the amplifiers utilizing stray capacitance and detector capacitance. Adjustment of front end voltage of each of the amplifiers permits compensation for nonuniformities among the detectors. There results an improved signal-to-noise ratio which can be optimized for different sampling rates of incoming radiation signals.
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patent: 4593320 (1986-06-01), Nishizawa et al.
patent: 4645938 (1987-02-01), Brissot et al.
patent: 4819071 (1989-04-01), Nakamura
de Bruin Johannes B.
Hewitt Mary J.
Brinich Stephen
Denson-Low W. K.
Santa Barbara Research Center
Schubert W. C.
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