The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2012
Filed:
Dec. 05, 2008
Katsuyuki Kitao, Zama, JP;
Katsuyuki Kitao, Zama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A light amount detector includes a light emitter, a light receiver, and a light amount detection unit. The light emitter emits light on a detection pattern formed on a detection surface of an image carrier. The light receiver detects diffused light reflected from the detection pattern. The light amount detection unit detects an amount of light received by the light receiver based on detection output of the light receiver. One of the light emitter and the light receiver is provided at a position directly opposite to the detection surface, such that a distribution of sensitivity of the light receiver detecting the diffused light is substantially symmetrical with respect to a detection output peak when the detection surface is substantially parallel to a hypothetical line connecting the light emitter with the light receiver.