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:
Oct. 06, 2009
Filed:
Oct. 04, 2006
Yoshihiro Ishibe, Tochigi, JP;
Yoshihiro Ishibe, Tochigi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
It is an object of the present invention to realize a multi-beam optical scanning device which is suitable for high speed and high recording density by almost completely offsetting and correcting a deviation of focusing positions in a main scanning direction of plural spots in an entire surface to be scanned without deteriorating focusing properties at all. The multi-beam optical scanning device includes: a light source devicehaving plural luminescence parts; a rotating polygon mirror; a first optical systemwhich converts plural light beams into convergent light beams or divergent light beams; and a third optical systemwhich guides the light beams onto a surface to be scannedof a drum shape, and when it is assumed that a maximum value of a positional deviation amount generated in a first direction is δY, a maximum value of a positional deviation amount generated in a second direction is δY, and a maximum value of a positional deviation amount generated in a third direction is δY, conditional expression (1) is satisfied.