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AUTOMATIC LAMP INTENSITY CONTROL FOR RASTER INPUT SCANNERS

IP.com Disclosure Number: IPCOM000025869D
Original Publication Date: 1988-Aug-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

Raster input scanners provide sensors for the detection of light reflected from or transmitted through the document. The sensors produce an output proportional to detected light intensity. Lamps used for the illumination of documents in such systems provide varying output responses over time, based on lamp aging and general lamp-to-lamp differences. Accordingly, control of the light source is an important aspect in optimum data acquisition.