Imaging lens assembly having multiple lenses with positive and negative refractive powers
US7982977B2 · kind B2 · utility
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2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 17, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Apr 17, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens, which can be suitable for small-size information terminals, such as mobile phones equipped with cameras, or Personal Digital Assistants (PDAs). The imaging lens includes an iris, a first lens having a positive refractive power, a second lens, having a negative refractive power, a third lens having an aspherical shape and a positive refractive power, and a fourth lens having an aspherical shape and a negative refractive power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.