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:
Feb. 21, 2023
Filed:
Aug. 11, 2020
Zhejiang Sunny Optical Co., Ltd, Zhejiang Province, CN;
Saifeng Lyu, Zhejiang Province, CN;
Mengna Tang, Zhejiang Province, CN;
Fujian Dai, Zhejiang Province, CN;
Liefeng Zhao, Zhejiang Province, CN;
Zhejiang Sunny Optical Co., Ltd., Zhejiang Province, CN;
Abstract
The present disclosure discloses an optical imaging system. The optical imaging system satisfies: f/EPD≤1.5; 0.3<T23*10/R4<1.8; −0.6<f2/f4<−0.1; and TTL/ImgH<1.4, where f is an effective focal length of the optical imaging system, EPD is an entrance pupil diameter of the optical imaging system, T23 is a spaced interval between the second lens and the third lens along the optical axis, R4 a radius of curvature of an image-side surface of the second lens, f2 is an effective focal length of the second lens, f4 is an effective focal length of the fourth lens, TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging system, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane.