Patent ID: 8896846
Filing Date: 2014-11-25
Classification: G01B,G01N,G03G

Abstract:
1. A reflective optical sensor configured to detect at least one of a position of the toner pattern or a toner density of a toner pattern, comprising: a light-emitting system that includes at least three light-emitting elements; a light-receiving system that includes at least three light-receiving elements and receives light emitted from the light-emitting system and then reflected by the toner pattern; and a lighting optical system that guides light emitted from the light-emitting system to the toner pattern, wherein the at least three light-emitting elements and the at least three light-receiving elements are arranged at equal intervals in a certain direction, and the lighting optical system has a lateral magnification m that satisfies m ≦P/S, where S is size of the light-emitting elements and P is arrangement pitch of the light-emitting elements.