Patent · US Active

Lens module of scanner

US7982962B2 · kind B2 · utility

0Cited by

0References

5Claims

0Family size

Assignee

ASIA OPTICAL CO., INC. · TW

Inventors

Wei Zhan · Baofeng County, CN
Jian-Wei Lee · Taichung, TW

Key dates

Filing date	Sep 8, 2010
Grant date	Jul 19, 2011
Priority date	—
Expiry date	Sep 8, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04N2201/02458
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A lens module of a scanner is provided, including a first lens with a positive diopter, a second lens with a negative diopter, a third lens with a positive diopter, and a fourth lens with a negative diopter. The first, second, third, and fourth lenses are sequentially arranged from an object end to an image end of the lens module, and at least one of the first and fourth lenses is an aspheric lens. The fourth lens has a focal length f4 and an objective side surface with a radius of curvature R7, wherein 0.1<R7/f4<1.

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