Browse Prior Art Database

BENT FLUORESCENT LAMP FOR BOOKEDGE SCANNING

IP.com Disclosure Number: IPCOM000026358D
Original Publication Date: 1991-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 77K

Publishing Venue

Xerox Disclosure Journal

Abstract

The object of this disclosure is to describe a unique fluorescent lamp for use in digital image scanners and copiers that require scanning or copying a book. To enable bookedge imaging, the scanner or copier must be capable of reading into the binding of books with little degradation in image quality. Fluorescent lamp irradiance falls off quickly as the end of the lamp is approached causing image degradation at the edges of the page being imaged. Imaging into the binding of a book causes even more distortion.

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XEROX DISCLOSURE JOURNAL

BENT FLUORESCENT LAMP FOR BOOKEDGE SCANNING U.S. C1.313/486 David 0. Thompson
James 0. Mitchel
Jack K. Fullerton

Proposed Classification

Int. C1. HOlj 01/62

FIG. I

XEROX DISCLOSURE JOURNAL - Vol. 16, No. 4 July/August 1991 213

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BENT FLUORESCENT LAMP FOR BOOKEDGE SCANNING(Cont'd)

The object of this disclosure is to describe a unique fluorescent lamp for use in digital image scanners and copiers that require scanning or copying a book. To enable bookedge imaging, the scanner or copier must be capable of reading into the binding of books with little degradation in image quality. Fluorescent lamp irradiance falls off quickly as the end of the lamp is approached causing image degradation at the edges of the page being imaged. Imaging into the binding of a book causes even more distortion.

To meet the image quality requirements so that degradation while imaging the bookedge decreased, one could elongate the lamp such that the bookedge imaging would take place before the lamp begins to degrade. This approach causes the imaging apparatus to grow in size. This proposal is to bend the lamp as shown in Figure 1. The bending of the lamp provides uniform illumination to enable quality imaging of the bookedge. Also, the bending of the lamp makes the illumination assembly more compact than if a longer lamp was used. A lamp of this type could be used in any scanning or copying product wit...