Patent · US Active

Optical lens system for taking image

US7957075B2 · kind B2 · utility

120Cited by

3References

17Claims

0Family size

Assignee

LARGAN PRECISION CO., LTD. · TW

Inventor

Hsiang-Chi Tang · Taichung, TW

Key dates

Filing date	Feb 27, 2008
Grant date	Jun 7, 2011
Priority date	—
Expiry date	Aug 22, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/18
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An optical lens system for taking image consisting of from the object side to the image side: an aperture stop; a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, at least one of the object-side and the image-side surfaces of the second lens element being aspheric; and a third lens element with positive refractive power having a convex object-side surface and a convex image-side surface, at least one of the object-side and the image-side surfaces of the third lens element being aspheric.

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