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. 11, 2024
Filed:
Dec. 07, 2020
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Takuya Imaoka, Kanagawa, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 13/16 (2006.01);
U.S. Cl.
CPC ...
G02B 15/143105 (2019.08); G02B 13/16 (2013.01);
Abstract
A projection lens system is a projection lens system including a plurality of lens groups, the plurality of lens groups each including one or more lenses and moving such that an interval between the lens groups changes during a zooming action, the projection lens system including a first lens group disposed closest to a magnification side, the first lens group having positive power, wherein the first lens group includes one negative lens satisfying 0.0005<Δpgfn<0.01 and 32<vdn<45.