Thin type optical lens system for taking image
US7898747B2 · kind B2 · utility
119Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Apr 2, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens system for taking image comprises three lens elements with refractive power, from the object side to the image side: a first lens element with positive refractive power, a second lens element with negative refractive power having at least one aspheric surface, a third lens element with negative refractive power having at least one aspheric surface, and an aperture stop located between the first lens element and the second lens element. By such arrangements, it can effectively reduce the volume and the sensitivity of the lens system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.