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. 18, 2016
Filed:
Sep. 21, 2014
Applicant:
Nikon Corporation, Chiyoda-ku, Tokyo, JP;
Inventors:
Motohisa Mouri, Kawasaki, JP;
Taku Matsuo, Kawasaki, JP;
Yukio Kubota, Tsurugashima, JP;
Takuya Sato, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 25/00 (2006.01); G03B 13/06 (2006.01); G02B 13/18 (2006.01);
U.S. Cl.
CPC ...
G02B 25/001 (2013.01); G02B 13/18 (2013.01); Y10T 29/49826 (2015.01);
Abstract
Providing an eyepiece optical systemcomprising: an eyepiece system; and an optical memberhaving a meniscus shape disposed to an eye side of the eyepiece system, the following conditional expression being satisfied:2.00<||/fe<22.00where fe denotes a focal length of the eyepiece systemwhen a diopter of the eyepiece systemis 0 (m), and R denotes a radius of curvature of the surface having the meniscus shape, and the optical memberwith a meniscus shape having a concave surface facing the eye side.