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FILM INTERMEDIATE RASTER INPUT SCANNER

IP.com Disclosure Number: IPCOM000025322D
Original Publication Date: 1984-Aug-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

A number of known Raster Input Scanners (RISI technologies exist such as a laser flying spot scanner. There, a multi-faceted polygon is used to scan the reading beam across a document original. The polygon is driven by a synchronous or DC motor, and the polygon facets are set up or made to very close angular tolerances with respect to one another to assure accuracy. Usually, the document original is moved in a linear fashion over a scan slit with video detection accomplished by means of a linear detector, a light pipe with detector, or a remote detector having a lengthwise intensity correction factor. For a full frame scanning system with a fixed document, other methods of achieving the detection may be used.