Patent ID: 8467065
Filing Date: 2013-06-18
Classification: G01N,G03G

Abstract:
1. A reflective optical sensor detecting at least one of a position of a toner pattern and a toner density of the toner pattern, the reflective optical sensor comprising: an illuminating system that has at least three light-emitting units; a light-receiving system that has at least three light-receiving units and receives light output from the illuminating system and reflected by the toner pattern; and an illuminating optical system that includes at least three illuminating condenser lenses individually corresponding to the at least three light-emitting units and that guides the light output from the illuminating system to the toner pattern, wherein the at least three light-emitting units and the at least three light-receiving units are both arranged in equal distance with respect to one direction, and optical axes of the at least three illuminating condenser lenses are off-center in parallel to an axis passing through a center of and perpendicular to the corresponding light-emitting unit.