Image pickup lens, image pickup device, and mobile terminal device
US7948689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2010 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Jun 23, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image pickup lens, comprises sequentially from an object side: an aperture stop, a first lens being a positive meniscus lens which has a convex surface at the object side and a concave surface at an image side opposite to the object side, and a second lens having a concave surface at the object side and an image side surface whose radius of curvature on an paraxial region is infinite or a negative value, wherein the first lens is the second lens and the image side surface of the second lens includes an aspheric surface to make a positive power strong toward a lens peripheral region, and wherein the image pickup lens is made to satisfy the following conditional formulas:1.55<n1<1.80 (1)0.4<D3/f<0.6 (2)40.0<ν2<90.0 (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.