Imaging lens system
US8233224B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2010 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Oct 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.