Imaging lens
US9804359B2 · kind B2 · utility
5Cited by
5References
15Claims
0Family size
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Key dates
| Filing date | Nov 18, 2015 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Feb 2, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens; a fifth lens; and a sixth lens having negative refractive power, arranged in this order from an object side to an image plane side. The fourth lens and the fifth lens have a composite focal length f45, and the third lens has an Abbe's number νd3 so that the following conditional expressions are satisfied:0<f45,40<νd3<75.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.