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Browse Prior Art Database

EXPOSURE LAMP CONTROL

IP.com Disclosure Number: IPCOM000024817D
Original Publication Date: 1982-Apr-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to a document imaging system and describes a method of controlling exposure variations caused by operating temperature variations of the document illuminating light source. A typical light source in a document copier such as a fluorescent lamp, has a light output that varies as a function of operating temperature. For example, over a temperature span of 80°F to 120°F, the light output within a single run can vary as much as +/- 20%, respectively.