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:
Jan. 29, 2002
Filed:
Dec. 06, 1999
Kazuhiro Yoshino, Iwatsuki, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
In an optical scanning apparatus used in an image forming apparatus for scanning a plurality of optical beams on photosensitive members and for synthesizing a plurality of images formed on the photosensitive members to output a synthesized image as a single image, positional shifts occurred in the plural images can be corrected in a simple arrangement and in low cost. The optical scanning apparatus is arranged by a light source for projecting plural optical beams; deflecter for deflecting the optical beams; first beam sensor for sensing positions of the respective optical beams along an optical beam scanning direction; second beam sensor for sensing positions of the respective optical beams along a direction intersected with the scanning direction; and modulation controller for controlling a modulation of each of the plural optical beams projected from the light source based upon the sense results obtained from the first beam sensor and the second beam sensor in such a manner that a positional shift occurred when plural images formed by the respective optical beams are synthesized with each other is suppressed.