Imaging lens system
US8000036B2 · kind B2 · utility
1Cited by
2References
9Claims
0Family size
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Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Apr 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens system in order from the object side to the image side includes a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power and a sixth lens with positive refractive. The imaging lens system satisfies the following formulas: Nd2>1.8 and Vd2<25, where Nd2 is the refractive index of the second lens, Vd2 is the Abbe number of the second lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.