发明申请
US20090047032A1 SYSTEM FOR MEASURING MARKING MATERIAL ON A SURFACE, SUCH AS IN COLOR XEROGRAPHY 有权
用于在表面上测量标记材料的系统,如色彩XEROGRAPHY

SYSTEM FOR MEASURING MARKING MATERIAL ON A SURFACE, SUCH AS IN COLOR XEROGRAPHY
摘要:
A printing apparatus has a substantially shiny photoreceptor imaging surface, and a photosensor array disposed to receive specularly-reflected light from the imaging surface. A quantity of toner is placed on the imaging surface, and data is derived based on light reflected from the imaging surface. The reflected light is filtered to a color effectively complementary to the toner color. The system avoids noise caused by diffusely-reflected light from powdered toner.
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