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LAMP SHIELD

IP.com Disclosure Number: IPCOM000026045D
Original Publication Date: 1989-Dec-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 44K

Publishing Venue

Xerox Disclosure Journal

Abstract

Xenon flash lamps are frequently used in the optical system of an electrophotographic printing machine to illuminate the original document. The operator's eyes must be protected, and the light directed and shaped to achieve uniform illumination at the image plane. The material used for the shield must not degrade rapidly under the influence of ultraviolet or infrared radiation. A light shield design which does not degrade is a two piece design composed of styrene extrusions cemented to one another. The basic extrusion is a particular grade of styrene which transmits a specific percentage of light. A second extruded piece is cemented beneath the basic extrusion. The second piece is filled with a specific percentage of Ti02 to further control light transmission. The styrene is doped to absorb ultra violet radiation.

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CEROX DISCLOSURE JOURNAL

LAMP SHIELD

Proposed John Hainey Classification

U.S. C1.355/200 ht. C1. G03g 15/00

Xenon flash lamps are frequently used in the optical system of an electrophotographic printing machine to illuminate the original document. The operator's eyes must be protected, and the light directed and shaped to achieve uniform illumination at the image plane. The material used for the shield must not degrade rapidly under the influence of ultraviolet or infrared radiation. A light shield design which does not degrade is a two piece design composed of styrene extrusions cemented to one another. The basic extrusion is a particular grade of styrene which transmits a specific percentage of light. A second extruded piece is cemented beneath the basic extrusion. The second piece is filled with a specific percentage of Ti02 to further control light transmission. The styrene is doped to absorb ultra violet radiation.

Volume 14 Number 6 November/December 1989 293

[This page contains 1 picture or other non-text object]

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     XEROX DISCLOSURE JOURNAL Volume 14 Number 6 November/December 1989

294

[This page contains 1 picture or other non-text object]