System and methodology for the use of optical positioning system for scanners

The present invention is directed to a system and methodology in which the stepper motor (or a DC motor/encoder combination) of an optical scanning device is replaced by a DC motor which receives feedback information from an extended photodetector used in the scanner, or a proximately close second p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Brandenberger, Sarah, Lydegraf, Curt, Keithley, Douglas, Witte, Stephen
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention is directed to a system and methodology in which the stepper motor (or a DC motor/encoder combination) of an optical scanning device is replaced by a DC motor which receives feedback information from an extended photodetector used in the scanner, or a proximately close second photodetector. The photodetector of current scanners may be extended (or a second photodetector may be incorporated) to read a margin marking located on, or attached to, the scanner body and the resolution of the extended portion, or separate photodetector, may be increased to accurately capture positioning information. The photodetector of the present invention detects the margin marking, typically located outside of the document scanning area, to determine positional information which is used by the processor to accurately determine position.