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:
May. 07, 2013
Filed:
Jun. 03, 2009
Kota Kiyama, Kawasaki, JP;
Kota Kiyama, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical scanning apparatus includes a light source which emits an optical beam, a deflection scanning unit, and a control unit. The deflection scanning unit includes a rotating polygonal mirror which deflection-scans the optical beam emitted from the light source so that the optical beam will scan an object to be scanned, and a drive unit which rotationally drives the rotating polygonal mirror. The control unit controls the rotational speed of the rotating polygonal mirror by accelerating or decelerating the drive unit at a predetermined time during one rotation of the rotating polygonal mirror. The predetermined time is a time when a deviation in length of a scanning line formed by each reflecting surface of the rotating polygonal mirror becomes relatively small.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile