Patent · US Active

Zoom lens assembly

US11719918B2 · kind B2 · utility

0Cited by

1References

18Claims

0Family size

Assignee

Zhejiang Sunny Optics Co., Ltd · CN

Inventors

Fujian Dai · Ningbo City, CN
Wuchao Xu · Zhejiang, CN
Qi Wu · Zhejiang, CN
Liefeng Zhao · 丈亭镇, CN

Key dates

Filing date	Jul 14, 2021
Grant date	Aug 8, 2023
Priority date	—
Expiry date	Aug 4, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG02B15/144105
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The present disclosure discloses a zoom lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens group having refractive power; a second lens group having negative refractive power; a third lens group having refractive power; and a fourth lens group having refractive power. The zoom lens assembly may be continuously zoomed by changing positions of the second lens group and the third lens group along the optical axis. A total effective focal length ft of the zoom lens assembly in a telephoto state, and a total effective focal length fw of the zoom lens assembly in a wide-angle state satisfy: 1.3<ft/fw<3.3.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.