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:
Aug. 05, 2025
Filed:
Mar. 30, 2021
Applicant:
Lg Innotek Co., Ltd., Seoul, KR;
Inventors:
Ju Yong Shim, Seoul, KR;
Tae Kyung Kim, Seoul, KR;
Assignee:
LG INNOTEK CO., LTD., Seoul, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 13/00 (2006.01); G02B 15/20 (2006.01); G02B 15/167 (2006.01);
U.S. Cl.
CPC ...
G02B 15/144 (2019.08); G02B 13/0045 (2013.01); G02B 13/009 (2013.01); G02B 15/20 (2013.01); G02B 15/167 (2013.01);
Abstract
A zoom optical system according to an embodiment of the present invention comprises a first lens group, a second lens group, a third lens group, and a fourth lens group which are successively arranged from an object side to an image side, wherein the first lens group to the fourth lens group each comprise two lenses, wherein the second lens group and the third lens group are movable, and wherein the telephoto effective focal length (EFL) is defined by the mathematical expression below: