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STEPPED NEUTRAL DENSITY FILTER DIAGNOSTIC TOOL FOR CHANNEL SENSORS

IP.com Disclosure Number: IPCOM000027736D
Original Publication Date: 1999-Apr-30
Included in the Prior Art Database: 2004-Apr-09

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a stepped, neutral density filter useable in conjunction with the diagnostic mode of an electrophotographic printing machine to determine the degradation of channel sensors located therein. By using a sensor's known electrical characteristics and relating it to different transmittance levels, a reading can be obtained predicting the sensor's remaining life.