Imaging lens assembly comprising seven lenses of −+++−++ or −−++−++ refractive powers

US11181718B2 · kind B2 · utility

Assignee

• Zhejiang Sunny Optical Co., Ltd · CN

Inventors

• Fujian Dai · Ningbo City, CN
• Lin Huang · 丈亭镇, CN
• Yuanlin Jia · Lo Wu, CN

Key dates

• Filing date: Oct 23, 2017
• Grant date: Nov 23, 2021
• Expiry date: Dec 27, 2037

Classification

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

Abstract

The present disclosure discloses an imaging lens assembly, the imaging lens assembly having a total effective focal length f and comprising sequentially, along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. Each of the first lens and the fifth lens has a negative focal power; each of the second lens, the fourth lens, the sixth lens and the seventh lens has a positive focal power or a negative focal power; and the third lens has a positive focal power, and an effective focal length f3 of the third lens and the total effective focal length f satisfy: 1<f3/f<1.5.