Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-12-17
1984-04-10
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358227, H04N 315
Patent
active
044424574
ABSTRACT:
The charge coupled device focal zoom of the present invention is used in connection with a time delay and integration charge coupled device imager in which a plurality of detectors is scanned at an angular rate .omega. across a field of view subtended by a scanning angle .alpha., wherein output charge from the detector array is clocked through associated charge coupled device registers at a clock frequency f.sub.ccd in synchronism with the scanning motion. A video display receiving the signal from the charge coupled device register may zoom in on a small portion of the field of view subtended by a reduced angle .alpha.
. This is accomplished by restricting the scanning angle to the reduced angle .alpha.
and simultaneously reducing the CCD clocking frequency to f.sub.ccd
and the scanning rate to .omega.
. The resolution of the image is enhanced because the sampling time T is increased while at the same time the synchronism between charge transfer and scanning movement is maintained for all values of n. A frequency converter is provided at the output of the serial registers which periodically integrates output charge packets from the registers at a constant rate so that a video signal having a constant frequency is output to video display electronics even though the zoom magnification factor n is varied.
REFERENCES:
patent: 4245240 (1981-01-01), Tanaka
patent: 4306252 (1981-12-01), Fearnside
patent: 4336557 (1982-06-01), Koch
patent: 4383274 (1983-05-01), Inuiya
Bethurum W. J.
Hughes Aircraft Company
Karambelas A. W.
Masinick Michael A.
Meltzer Mark J.
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