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:
Oct. 22, 2024
Filed:
Dec. 09, 2020
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventor:
Hiroki Saito, Saitama, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 25/00 (2006.01); G02B 9/34 (2006.01);
U.S. Cl.
CPC ...
G02B 25/001 (2013.01); G02B 9/34 (2013.01);
Abstract
The eyepiece lens consists of, in order from an observation object side to an eye point side, a positive first lens, a negative second lens, a positive third lens, and a positive fourth lens. All lenses are single lenses. The second lens has a biconcave shape. An observation object-side surface of the fourth lens has a convex shape. In a case where a refractive index of the third lens with respect to d line is N3, the eyepiece lens satisfies the following conditional expression.1.76<3<2