REFLECTANCE SENSORS FOR COPY QUALITY OPTIMIZATION
Original Publication Date: 2001-Apr-30
Included in the Prior Art Database: 2004-Apr-09
Xerox Disclosure Journal
Disclosed are paper brightness sensors located in each paper tray and original document tray of an electrophotographic printing machine. The sensors measure reflectance of sheets being fed with output signals being used to control the halftone image density to make a copy look like the original or make the contrast of an extended print run appear consistent.