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:
Apr. 09, 2024
Filed:
Aug. 15, 2019
Jiangxi Ofilm Optical Co., Ltd., Nanchang, CN;
Jiangxi OFILM Optical Co., Ltd., Jiangxi, CN;
Abstract
An optical system (), sequentially comprising from an object side to an image side: a first lens (L) having positive refractive power, an object-side surface (S) of the first lens (L) being a convex surface at the circumference; a second lens (L), a third lens (), a fourth lens (L), a fifth lens (L), a sixth lens (L), and a seventh lens (L) having refractive power; and an eighth lens (L) having negative refractive power. An image-side surface (S) of the seventh lens (L) is a concave surface at the optical axis. In addition, the optical system () satisfies 1<TTL/<2.5, wherein TTL is the distance between the object-side surface (S) of the first lens (L) and an imaging surface (S) of the optical system () on the optical axis. The optical system () further comprises a diaphragm (STO), and L is the effective aperture diameter of the diaphragm (STO).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile