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:
Jun. 23, 2026
Filed:
Dec. 07, 2023
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Takahiro Kitada, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 7/14 (2021.01);
U.S. Cl.
CPC ...
G02B 15/144503 (2019.08); G02B 7/14 (2013.01);
Abstract
A zoom lens system includes multiple lens groups and an aperture stop. The multiple lens groups consist of: a first lens group having negative power; a second lens group having positive power, a third lens group having negative power; and a fourth lens group having negative power. The aperture stop is disposed between the first and second lens groups. The zoom lens system satisfies 0.5<fw/BFw<1.5, where fw is a focal length of the zoom lens system at a wide-angle end and BFw is a back focus of the zoom lens system at the wide-angle end.