Optical imaging lens group

US11966014B2 · kind B2 · utility

Assignee

• Zhejiang Sunny Optical Co., Ltd · CN

Inventors

• Long Li · Shanghai, CN
• Saifeng Lyu · Ningbo City, CN

Key dates

• Filing date: Sep 1, 2020
• Grant date: Apr 23, 2024
• Expiry date: Jan 23, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/0025
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical imaging lens group includes, 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 positive refractive power, and both an object-side surface and an image-side surface thereof are convex; the second lens has refractive power, and an object-side surface thereof is convex; the third lens has refractive power, and an object-side surface thereof is concave; the fourth lens has refractive power; the fifth lens has refractive power; the sixth lens has refractive power, and an object-side surface thereof is convex; and the seventh lens has negative refractive power. An edge thickness ET6 of the sixth lens and a center thickness CT6 of the sixth lens along the optical axis satisfy 0.2<ET6/CT6<0.9.