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:
Sep. 17, 2024
Filed:
Mar. 16, 2020
Jiangxi Jingchao Optical Co., Ltd., Nanchang, CN;
Hairong Zou, Nanchang, CN;
JIANGXI JINGCHAO OPTICAL CO., LTD., Nangchang, CN;
Abstract
An optical system () includes, successively from an object side to an image side, a first lens unit () having a positive refractive power, a second lens unit () having a negative refractive power, a third lens unit () and a fourth lens unit () having a positive refractive power; the positions of the first lens unit () and the fourth lens unit () are fixed with respect to the imaging surface (S) of the optical system (), and the second lens unit () and the third lens unit () are movable with respect to the first lens unit () in the optical axis direction of the optical system (); when the optical system is zoomed from the short focal end to the long focal end, a distance between the first lens unit () and the second lens unit () and the distance between the third lens unit () and the fourth lens unit () increase.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile