Browse Prior Art Database

Color Image Scanner

IP.com Disclosure Number: IPCOM000056811D
Original Publication Date: 1988-Feb-01
Included in the Prior Art Database: 2005-Feb-14

Publishing Venue

IBM

Related People

Authors:
Masuda, K Yamazaki, T [+details]

Abstract

This article describes a color image scanner including a polarizer, an optical characteristic of which is controlled to pass one polarized ray generated from a continuously activated light source to a document to be scanned. Fig. 1 shows the color image scanner. Three light sources, i.e., a red lamp 1a, a green lamp 1b and a blue lamp 1c are continuously activated. A ray of light from each lamp is polarized by each of polarizers 2a, 2b and 2c, respectively, as shown in Fig. 1. A polarizer 3 is controlled to selectively switch its optical characteristics to pass the polarized rays in the sequence of red, green and blue to a document 4 to be scanned. The reflected ray is sensed by an (Image Omitted) optical sensor 5 which generates electrical signals representing an image of the document 4.