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:
May. 26, 2015
Filed:
Mar. 14, 2014
Fujifilm Corporation, Tokyo, JP;
Kenichi Sato, Saitama-ken, JP;
Michio Cho, Saitama-ken, JP;
FUJIFILM CORPORATION, Tokyo, JP;
Abstract
In order from the object side, a first lens having positive power with a convex observation-side surface, a second lens having negative power and a meniscus shape with a concave object-side surface, and a third lens having positive power with an observation-side surface having a smaller radius of curvature than that of an object-side surface are provided. The first, second and third lenses are single lenses. The conditional expressions (1): 0.9<f1/f3<5.0, (2): 10.0<TL<17.0 and (3): 15.0<f<25.0 are satisfied at the same time, where f1 is a focal length of the first lens, f3 is a focal length of the third lens, f is a focal length of the entire system, and TL is a distance along an optical axis from an object-side lens surface of the first lens to the observation-side lens surface of the third lens.