Photoelectric scanning apparatus

Details Photoelectric scanning apparatus Photoelectric scanning apparatus

1979-12-03

1981-10-20

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358264, 358285, 250578, H04N 110

Patent

active

042964415

ABSTRACT:
A charge accumulation type photosensor array (21) is reciprocated perpendicular to the direction of a row of photosensor elements of the array (21) to scan an original document (22). A timing pulse generator (48) produces timing pulses (E) corresponding to incremental movements of the array (21). All of the photosensor elements produce data signals (Vid) at outputs thereof in series in response to each timing pulse (E). An enable signal (L) is produced when the array (21) is moving in an effective scan area in which the array (21) is moving at constant speed and the periods of the timing pulses (E) are constant. Binary data signals (D) are stored in a memory (44) only while the enable signal (L) is being produced. The charge accumulation times of the photosensor elements in the effective scan area are constant, and especially the charge accumulation time in the first increment of movement in the effective scan area is the same as in the succeeding increments.

REFERENCES:
patent: 2953638 (1960-09-01), Wintringham
patent: 3142761 (1964-07-01), Rabinow
patent: 4199784 (1980-04-01), Wellendorf
patent: 4203136 (1980-05-01), Wellendorf et al.

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