Image pickup lens and image pickup apparatus
US8508862B2 · kind B2 · utility
0Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2011 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Sep 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image pickup lens having a four lens configuration in which a bi-concave first lens, a bi-convex second lens, a bi-concave third lens, and a positive fourth lens are disposed in this order from an object side. Here, at least one of the first, second, third, and fourth lenses has an aspherical surface on each side. The image pickup lens satisfies Conditional Expression (1) given below when a refractive index of the second lens with respect to d-line is taken as Nd2.1.6<Nd2 (1)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.