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:
Apr. 09, 2013
Filed:
Sep. 09, 2010
Hiroki Harada, Zushi, JP;
Yasushi Yamamoto, Kishiwada, JP;
Hiroki Harada, Zushi, JP;
Yasushi Yamamoto, Kishiwada, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A wide-angle lens LN consists of, in order from an object side: a first lens group Grhaving positive refractive power; and a second lens group Grhaving positive refractive power; the second lens group Gris movable toward the object side with fixing the first lens group Gr, thereby carrying out focusing on a close object, and a given conditional expression is satisfied. Therefore, a wide-angle lens having high optical performance with suppressing variation in aberrations upon focusing in spite of being a large aperture, an imaging optical apparatus equipped therewith, and a digital equipment are provided.