Optical imaging lens including seven lenses of +−+−−+− or +−+−++− refractive powers

US11693216B2 · kind B2 · utility

Assignee

• Zhejiang Sunny Optical Co., Ltd · CN

Inventors

• Meng Yang · Taipei, TW
• Fujian Dai · Ningbo City, CN
• Liefeng Zhao · 丈亭镇, CN

Key dates

• Filing date: Jul 16, 2020
• Grant date: Jul 4, 2023
• Expiry date: Apr 30, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B9/64
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The disclosure provides an optical imaging lens, which sequentially includes, from an object side to an image side: a first lens with positive focal power; a second lens with negative focal power; a third lens with positive focal power; a fourth lens with focal power; a fifth lens with focal power; a sixth lens with focal power, an object-side surface of which is a convex surface and an image-side surface of which is a concave surface; and a seventh lens with negative focal power, an image-side surface of which is a concave surface. An Entrance Pupil Diameter (EPD) of the optical imaging lens and an effective focal length f of the optical imaging lens meet 1.4<f/EPD<1.98, an air space T23 between the second lens and the third lens on an optical axis and an air space T34 between the third lens and the fourth lens on the optical axis meet 0.1<T23/T34<0.3.