Imaging lens system and imaging module having same
US7764443B2 · kind B2 · utility
1Cited by
4References
17Claims
0Family size
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Key dates
| Filing date | Apr 24, 2009 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Apr 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging module includes an imaging lens system and an image sensor. The imaging lens system includes a first lens, a second lens, a third lens, and a fourth lens. The imaging module satisfies the formulas, 2.4<F1/TTL<3.0, −7.0<F2/TTL<−5.5, 0.95<F3/TTL<2.0, and −3.5<F4/TTL<−2.5, wherein the TTL is the distance from the object surface of the first lens to the sensing surface of the image sensor on the optical axis of the imaging lens system, the F1 is the focal length of the first lens, the F2 is the focal length of the second lens, the F3 is the focal length of the third lens, and the F4 is the focal length of the fourth lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.