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:
Feb. 14, 2017
Filed:
Dec. 28, 2015
Applicant:
Takuya Nagano, Kanagawa, JP;
Inventor:
Takuya Nagano, Kanagawa, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/00 (2006.01); G02B 7/02 (2006.01); G02B 9/62 (2006.01); H04N 1/00 (2006.01); G02B 27/00 (2006.01); G02B 13/00 (2006.01);
U.S. Cl.
CPC ...
G02B 7/028 (2013.01); G02B 9/62 (2013.01); G02B 13/0045 (2013.01); G02B 27/0025 (2013.01); H04N 1/00559 (2013.01); H04N 1/00814 (2013.01);
Abstract
An image reading lens includes a plurality of lenses, a first correcting mechanism that corrects a field curvature at a first correction part when temperature changes, and a second correcting mechanism that corrects an image-forming position when the temperature changes. The second correcting mechanism corrects the image-forming position at a part where a positional displacement of the image-forming position caused by a change of a lens interval is greater and a variation of the field curvature caused by the change of the lens interval is smaller than the first correction part.