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:
Nov. 24, 2015
Filed:
Jan. 03, 2012
Nobuyuki Arai, Kanagawa, JP;
Makoto Hirakawa, Kanagawa, JP;
Naoki Miyatake, Kanagawa, JP;
Naoto Watanabe, Kanagawa, JP;
Tadashi Nakamura, Tokyo, JP;
Nobuyuki Arai, Kanagawa, JP;
Makoto Hirakawa, Kanagawa, JP;
Naoki Miyatake, Kanagawa, JP;
Naoto Watanabe, Kanagawa, JP;
Tadashi Nakamura, Tokyo, JP;
RICOH COMPANY, LIMITED, Tokyo, JP;
Abstract
Each scanning optical system includes a first scanning lens and a second scanning lens through which a light beam is incident onto the first scanning lens. The second scanning lens of each scanning optical system is disposed at the optically most downstream side in the scanning optical system and has an optical plane that has the strongest power in a sub-scanning corresponding direction. In addition, the optical plane of each second scanning lens, which has the strongest power in the sub-scanning corresponding direction, is located under the shaft bearings of neighboring polygon mirrors in the vertical direction.