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CONFORMABLE REFLECTOR-UNIFORM ILLUMINATION

IP.com Disclosure Number: IPCOM000024970D
Original Publication Date: 1983-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 64K

Publishing Venue

Xerox Disclosure Journal

Abstract

In the application of phosphor lamps and reflectors as illumination sources for raster input scanners, obtaining uniform illumination across the scan line is a problem. Most attempts to resolve this problem and provide uniform illumination have concentrated on attempts to use light controlling apertures in front of the imaging lens or in association with the illumination lamp.

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CONFORMABLE REFLECTOR-UNIFORM Proposed Classification ILLUMINATION U.S. Cl. 358/206 William Kingsley Int. CI. H04n 3/08

In the application of phosphor lamps and reflectors as illumination sources for raster input scanners, obtaining uniform illumination across the scan line is a problem. Most attempts to resolve this problem and provide uniform illumination have concentrated on attempts to use light controlling apertures in front of the imaging lens or in association with the illumination lamp.

In this context various aperture shapes have been suggested such as a straight slit- like aperture, curved aperture slit, hour glass shaped aperture slit, and the like. However, all of these proposed solutions to this problem require not only the addition of an extra component but also result in a corrective aperture which once installed provides a fixed correction.

Referring to the drawing, it is here proposed that instead of an aperture, the reflector 5 for the illumination lamp 6 be conformable. In this way, uniform illumination can be achieved by simply bowing the reflector 5 by a sufficient amount as is required to level peak illumination of lamp 6. This has the advantage of not requiring an additional optical part since reflector 5 is required anyway, and further permits readjustment of the illumination if later required.

Volume 8 Number 1 January/February 1983 59

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    XEROX DISCLOSURE JOURNAL Volume 8...