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:
Mar. 27, 2012
Filed:
Dec. 02, 2008
Applicant:
Hiroshi Nakahata, Abiko, JP;
Inventor:
Hiroshi Nakahata, Abiko, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image forming apparatus performs multi-color image formation using a plurality of scanning type optical devices which deflect and scan an optical beam using a rotating polygonal mirror. The image forming apparatus includes, for example, a detecting unit that detects a phase of rotating speed unevenness of rotating polygonal mirrors respectively provided in the plurality of scanning type optical devices, and an adjusting unit that adjusts, based on a phase of rotating speed unevenness detected for each rotating polygonal mirror, the rotating speed of each rotating polygonal mirror to reduce the phase differences between the phases.