Patent · US Active

Zoom lens

US9116332B2 · kind B2 · utility

0Cited by

2References

18Claims

0Family size

Assignees

SINTAI OPTICAL (SHENZHEN) CO., LTD. · CN
ASIA OPTICAL INTERNATIONAL LTD. · VG

Inventor

Ming-Chung Chen · Mission Viejo, US

Key dates

Filing date	Nov 27, 2013
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Nov 27, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG02B15/14
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens group is with positive refractive power and includes a first lens that is with negative refractive power and a second lens that is with positive refractive power. The second lens group is with negative refractive power. The third lens group is with positive refractive power and includes a third lens front group that is with positive refractive power and a third lens rear group that is with positive refractive power. The fourth lens group is with positive refractive power.

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