Imaging lens, imaging apparatus and portable terminal device
US8334922B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2010 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Dec 17, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/57
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging lens is provided and includes: in order from the object side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a concave surface on the image side near the optical axis and having a positive refractive power; a fourth lens having a positive refractive power near the optical axis; and a fifth lens having a negative refractive power near the optical axis. An image side surface of the fifth lens is concave near the optical axis and has a region where a negative power of the region decreases toward a periphery of the fifth lens as compared with a negative power near the optical axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.