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Browse Prior Art Database

STIMULATED PHOSPHORESCENCE ENABLING XEROGRAPHIC MASTERS

IP.com Disclosure Number: IPCOM000026951D
Original Publication Date: 1994-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 90K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method is described for using stimulated phosphorescence to irradiate infrared and near infrared sensitive photoreceptors using laser diodes. The method provides the capability of "mastering" photoreceptors, that is a photoreceptor can be exposed to an original image to be copied only once, and then used many times without subsequent reexposure to the original image.

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XEROX DISCLOSURE JOURNAL

STIMULATED Proposed Classification PHOSPHORESCENCE ENABLING U.S. C1.355/233 XEROGRAPHIC MASTERS
Ronald E. Godlove
Huoy-Jen Yuh
John S. Chambers
Rachel Forgit
Robert E. McCumiskey
Kamran U. Zaman

Int. C1. G03g 15/28

A method is described for using stimulated phosphorescence to irradiate infrared and near infrared sensitive photoreceptors using laser diodes. The method provides the capability of "mastering" photoreceptors, that is a photoreceptor can be exposed to an original image to be copied only once, and then used many times without subsequent reexposure to the original image.

Infrared sensors are commercially available that emit visible light when stimulated by near infrared and infrared radiation. The emission occurs when the sensor has been previously exposed to blue light, and then exposed to near infrared or infrared light. Energy is stored in the sensor's light sensitive elements or pigments or equilvalent electronic elements during the exposure to blue light. When subsequently stimulated by near infrared or infrared light, a phosphorescent photoactive pigment material phosphoresces in the visible region of the electromagnetic spectrum. Thus, in principle, a photoreceptor incorporating the same or similarly acting pigment can provide "mastering" capability. If a photoreceptor of this type is first exposed to an image using blue light, then the exposure to near infrared or infrared light thereafter will stimulate phosphorescence i...