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:
Sep. 04, 2018
Filed:
Mar. 11, 2016
Applicants:
Seiya Amano, Kawasaki, JP;
Hiroyuki Satoh, Yokohama, JP;
Inventors:
Seiya Amano, Kawasaki, JP;
Hiroyuki Satoh, Yokohama, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 7/10 (2006.01); G02B 13/06 (2006.01); G02B 5/20 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 13/06 (2013.01); G02B 5/208 (2013.01); G02B 27/0018 (2013.01);
Abstract
An optical system, which may include a fish-eye lens including a whole view angle larger than 180 degrees, includes in order from an object-side to an imaging-side, a first lens group including a negative focal distance, an aperture, and a second lens group including a positive focal distance. An infrared cutting coat is coated on a lens surface that includes curvature of a lens among lenses included in the second lens group.