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:
Jan. 05, 2016
Filed:
Feb. 27, 2013
Nikon Vision Co., Ltd., Shinagawa-ku, Tokyo, JP;
Satoshi Fukumoto, Yokohama, JP;
Nikon Vision Co., Ltd., Tokyo, JP;
Abstract
There are provided an ocular lens in which aberrations are favorably corrected across a sufficiently wide angle of view and a lens diameter is suppressed from increasing with a sufficient eye relief attained and without a total length being long, and an optical apparatus including the ocular lens. An ocular lensused for an optical apparatus such as a telescope optical system TS includes: in order from an object side, a first lens group Gincluding a first lens component GA having negative refractive power and having a concave surface facing a viewer's eye side, a second lens component GB in a meniscus shape having a convex surface facing the object side, and a third lens component GC having positive refractive power; a second lens group Ghaving a lens component having a convex surface facing the viewer's eye side; a third lens group Ghaving positive refractive power. An object side focal plane of the third lens group Gis positioned between the second lens group Gand the third lens group G