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:
Nov. 08, 2022
Filed:
Apr. 09, 2020
Zhejiang Sunny Optical Co., Ltd., Ningbo, CN;
Saifeng Lyu, Ningbo, CN;
Ming Li, Ningbo, CN;
Abstract
The present disclosure discloses an optical imaging system including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has a negative refractive power; each of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens has a positive or a negative refractive power; an image-side surface of the third lens and an object-side surface of the sixth lens are concave; and the seventh lens has a negative refractive power, and an image-side surface thereof is concave. A combined focal length f56 of the fifth lens and the sixth lens and a combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens satisfy 2≤f56/f1234<6.