DEVELOPABILITY SENSOR HAVING AMBIENT LIGHT COMPENSATION
Original Publication Date: 1993-Aug-31
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
Disclosed is an improvement upon a developability sensor to provide stability of the sensor in the presence of stray or ambient light. A diffuse reflection based developability sensor is used to monitor the developed toner mass per unit of area on a control patch that is part of a xerographic process controls development stabilization system. The disclosed method uses means to compensate a light sensitive detector for measurement errors arising from ambient light present in the measuring environment. The method also uses means to measure and store the sensor response to the ambient light. Stored information is later used during the measurement of the sample to derive an accurate sensor signal when using the sensor illumination source.