Optical lens system for taking image
US7660049B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2007 |
| Grant date | Feb 9, 2010 |
| Priority date | — |
| Expiry date | Jul 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens system for taking image comprises four lens elements with refractive power, from the object side to the image side: a first meniscus lens element with negative refractive power; a second lens element with positive refractive power having a convex object-side and a convex image-side surface; a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a fourth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; and an aperture stop located between the object and the second lens element. The above arrangements effectively reduce the volume of the optical lens system while providing a relatively high resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.