Optical lens system for taking image
US7826151B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2009 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Feb 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens system for taking image comprises, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a fourth lens element with positive refractive power; a fifth lens element with refractive power; and an aperture stop located between an object to be photographed and the second lens element. In the optical lens system for taking image, the number of the lens elements with refractive power being limited to five. Such lens arrangements can effectively reduce the volume of the optical lens system, reduce the sensitivity of the optical lens system and obtain higher resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.