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. 07, 2014
Filed:
Feb. 25, 2011
Haruo Sato, Kawaguchi, JP;
Mami Muratani, Tokyo, JP;
Haruo Sato, Kawaguchi, JP;
Mami Muratani, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An imaging lens SL mounted in a digital single lens reflex camerais composed of, in order from an object side, a first lens group Ghaving negative refractive power, a second lens group Ghaving positive refractive power, and a third lens group Ghaving positive refractive power, wherein upon focusing on a near-distance object point from an infinite-distance object point, at least one of the first lens group Gand the second lens group Gis moved so as to change a distance between the first lens group Gand the second lens group Gand the imaging lens satisfies a given conditional expression, thereby providing a downsized imaging lens suited to an imaging apparatus such as a single lens reflex camera, having a less of change in overall length and optimal to driving an intra-lens-barrel motor.