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. 15, 2015
Filed:
Mar. 01, 2012
Taku Matsuo, Kawasaki, JP;
Taku Matsuo, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An ocular optical system EL for observing an image displayed on an image display element Ob has, in order from the image display element Ob: a first lens Lwhich is a positive lens; a second lens Lwhich is a negative lens having a strong concave surface facing the image display element Ob; and a third lens Lwhich is a positive lens having a strong convex surface facing the eye point EP in order to implement both high magnification and size reduction, wherein the first lens Lis cemented and integrated with the image display element Ob, in order to reduce the size of the ocular optical system EL while ensuring tele-centricity and sufficiently wide luminous flux.