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:
Feb. 16, 2016
Filed:
Jul. 31, 2014
Sony Corporation, Tokyo, JP;
Fumikazu Kanetaka, Chiba, JP;
Kodai Nagamatsu, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A zoom lens includes first to fourth lens groups having negative, positive, negative, and positive refractive power, respectively, and arranged in order from an object side. The first lens group includes negative lenses. The fourth lens group is configured of one positive lens. A zooming operation from wide end to telephoto end allows the first to third lens groups to travel along an optical axis, and allows the fourth lens group to be fixed. A focusing operation allows the third lens group to travel along the optical axis. The conditional expressions 1<(R+R)/(R−R)<5 and 2<(R+R)/(R31 R)<7 are satisfied where Rand Rare curvature radii on the object side and on the image side of a most-object-sided negative lens in the first lens group, respectively, and Rand Rare curvature radii on the object side and on the image side of the positive lens in the fourth lens group, respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile