Imaging lens
US7443611B2 · kind B2 · utility
10Cited by
3References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2006 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Sep 7, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens is provided and includes: a first lens of a positive lens; a second lens of a negative lens whose concave surface faces to an image side of the second lens; a third lens of a positive lens, whose both surfaces are aspheric, having a concave surface facing to an object side of the third lens; and a fourth lens of a meniscus lens, whose both surfaces are aspheric, having a convex surface facing to the object side near the optical axis, the lenses being arranged in this order from an object side, the first imaging lens satisfying the conditional expressions specified in the specification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.