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:
Jul. 16, 2019
Filed:
Aug. 22, 2017
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Yasuto Suzuki, Osaka, JP;
Genki Nakazawa, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/163 (2006.01); G02B 15/17 (2006.01);
U.S. Cl.
CPC ...
G02B 15/163 (2013.01); G02B 15/17 (2013.01);
Abstract
A zoom lens system is an optical system that includes, in order from an object side to an image side, a first lens group having one first lens element with positive optical power, a second lens group having one second lens element with negative optical power, a third lens group with negative optical power, and a subsequent lens group including at least two lens groups. When zooming, distances between the lens groups change, and condition: 1.65<|f2|/fw<2.20 (where f2: Focal length of the second lens group, and fw: Focal length of the entire system at a wide-angle end) is satisfied.