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. 16, 2001
Filed:
Dec. 06, 1999
Yoshihito Sekikawa, Iwatsuki, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The optical scanning device of the present invention which handles plural light beams reduces the number of the optical components to the minimum, and thereby intends to reduce the cost, shrink the size, and secure high performance. The optical scanning device of the present invention minimizes the number of deflectors that deflect light beams with a constant angular velocity in a direction corresponding to the main scanning direction to one, and also minimizes the number of polygon mirrors included in the deflector and the number of rotation drive units of the polygon mirror each to one. Further, the device makes up two f&thgr; lens systems for converging the light beams into a specific size and scanning the beam spots with a substantially constant speed with two pairs of the f&thgr; lenses each, and disposes the f&thgr; lens systems on the both sides of the deflector. Two light beams each fall on and go out from the f&thgr; lens systems, and the deflector performs the main scanning of these four light beams.