Patent ID: 7544923
Filing Date: 2009-06-09
Classification: G01N,G03G

Abstract:
1. A system for detecting reflectance from an image bearing surface in a printer or electronic copier, comprising: an illuminator array positioned adjacent to the image bearing surface, the illuminator array comprising a plurality of discrete illuminator elements spaced in a linear arrangement, the illuminating elements each being configured to emit a light beam for transmission to the image bearing surface at an incidence angle; a light diffuser positioned between the illuminator array and the image bearing surface, the light diffuser being positioned with respect to the illuminator array to receive the light beams emitted by the illuminator elements and to diffuse the light beams being transmitted to the image bearing surface in the linear direction of the illuminator array; a linear sensor array comprising a plurality of sensors positioned adjacent to the image bearing surface such that specular and diffuse portions of the light beams reflecting off the image bearing surface at a reflectance angle are received by the sensors.