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:
Jul. 22, 2025
Filed:
Dec. 16, 2020
Applicant:
Kazuyasu Ohashi, Chiba, JP;
Inventor:
Kazuyasu Ohashi, Chiba, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 9/04 (2006.01); G02B 3/12 (2006.01); G02B 13/18 (2006.01);
U.S. Cl.
CPC ...
G02B 9/04 (2013.01); G02B 3/12 (2013.01); G02B 13/18 (2013.01);
Abstract
An imaging lens consists of: a first lens group having positive power, the first lens group including a positive lens closest to an object within the first lens group; an aperture stop; and a second lens group having positive power. The first lens group, the aperture stop, and the second lens group are disposed in that order from an object side toward an image side. Only two negative air lenses of a first biconvex air lens and a second biconvex air lens are provided within the imaging lens. The first lens group includes the first biconvex air lens, and the second lens group includes a second biconvex air lens.