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. 17, 2006
Filed:
Dec. 01, 2004
Masanori Yoshikawa, Osaka, JP;
Hideo Hirose, Osaka, JP;
Masaaki Nakano, Osaka, JP;
Ikuko Katoh, Kyoto, JP;
Keisuke Fujimoto, Osaka, JP;
Masanori Yoshikawa, Osaka, JP;
Hideo Hirose, Osaka, JP;
Masaaki Nakano, Osaka, JP;
Ikuko Katoh, Kyoto, JP;
Keisuke Fujimoto, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In an overfilled optical scanner in which a plurality of light beams are used, a uniform luminous-energy distribution is achieved on a scanning plane to be scanned. The optical scanner includes: a light sourcefor producing a first light beam Land a second light beam L; a polygon mirror; a first image formation optical system for leading the light beams Land Lto a deflecting plane of the polygon mirror and for forming, on the deflecting plane, a line image whose width is greater than the plane width of the deflecting plane; and a second image formation optical system for leading the light beams Land Lfrom the polygon mirror to the scanning plane of a photosensitive drum and forming an image on the scanning plane. The first image formation optical system is adjusted so that the optical axes Aand Aof the first and second light beams Land Lare approximately symmetrical about the optical axis Aof the first image formation optical system. The powers of the first and second light beams Land Lare thus balanced with each other on the scanning plane.