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:
Aug. 07, 2012
Filed:
Nov. 03, 2010
Mitsuaki Wada, Tokyo, JP;
Mitsuaki Wada, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An imaging lens SL installed into such as an electronic still cameraincludes, in order from an object side: a first lens group Ghaving positive refractive power; a second lens group Ghaving negative refractive power; a third lens group Ghaving positive refractive power; and a fourth lens group Ghaving positive refractive power; the second lens group Gand the third lens group Gmove along an optical axis upon focusing from infinity to a close object, and a given conditional expression is satisfied, thereby providing a fast imaging lens capable of taking a picture from infinity to a close object with high optical performance, an optical apparatus equipped with the imaging lens, and a method for manufacturing the imaging lens.