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:
Aug. 11, 2009
Filed:
Nov. 13, 2006
Hideki Okamura, Osaka, JP;
Hideki Okamura, Osaka, JP;
Kyocera Mita Corporation, Osaka, JP;
Abstract
An optical scanning apparatus which does not require a complex shaped lens and which is capable of eliminating the bow of a beam light even when the shapes of a plurality of correcting lenses are unified by setting a shape of a sub-scanning cross-section of a scanning lens as a spherical surface when an incident angle condition to incident beam light is an angle of 2° or less against a cross-section which is at right angles to a rotational axis of a polygonal mirror. The curvature of an incident surface and an outputting surface of the scanning lens in the sub scanning direction is monotonically changed according to the position in the main scanning direction with respect to the distance from the predetermined center position in the main scanning direction.