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:
Mar. 17, 2020
Filed:
Sep. 12, 2018
Applicant:
Oki Data Corporation, Tokyo, JP;
Inventor:
Akihiro Yamamura, Tokyo, JP;
Assignee:
Oki Data Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/04 (2006.01); G02B 9/04 (2006.01); G02B 27/09 (2006.01); G02B 3/02 (2006.01); G02B 3/00 (2006.01);
U.S. Cl.
CPC ...
G03G 15/04054 (2013.01); G02B 3/005 (2013.01); G02B 3/0037 (2013.01); G02B 3/0062 (2013.01); G02B 3/0068 (2013.01); G02B 3/02 (2013.01); G02B 9/04 (2013.01); G02B 27/0961 (2013.01);
Abstract
Provided are a lens array, a lens unit, an exposure device, an LED head, and an image forming apparatus. The lens array includes a plurality of lenses arranged so as to form an array. Each of the plurality of lenses is configured so that a contour focal length which is a focal length of a ray incident on a first position separate from an optical axis is longer than a paraxial focal length which is a focal length of a ray incident on a second position in the vicinity of the optical axis.