Patent · US Active

Wide-angle lens

US9939612B2 · kind B2 · utility

0Cited by

0References

18Claims

0Family size

Assignees

AO ETHER OPTRONICS (SHENZHEN) LIMITED · CN
AO ETHER CORPORATION · TW

Inventors

Bo-Yan Chen · Zhejiang, CN
Hsi-Ling Chang · Taichung, TW

Key dates

Filing date	Jul 11, 2016
Grant date	Apr 10, 2018
Priority date	—
Expiry date	Dec 12, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/04
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A wide-angle lens comprises sequentially from an object side to an image side along an optical axis a first lens, a second lens, a stop and a third lens. The first lens is a biconcave lens and with negative refractive power. The second lens is a convex-concave lens with positive refractive power and includes a convex surface facing the object side and concave surface facing the image side. The third lens is with positive refractive power and includes a convex surface facing the image side. The wide-angle lens satisfies the following condition: 2.9<DL1DL2<3.1 wherein DL1 is an effective diameter of the first lens and DL2 is an effective diameter of the second lens.

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