Imaging lens and imaging apparatus using imaging lens
US8040618B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Nov 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens includes, in order from an object side, a positive first lens group, a stop, and a positive second lens group. The first lens group includes, in order from the object side, a first lens, which is a negative meniscus lens having a convex object-side surface, and a second lens having a positive power and including a convex image-side surface. The second lens group includes, in order from the object side, a third lens having a negative power and including a concave object-side surface, a fourth lens having a positive power and including a convex image-side surface, a fifth lens, which is a biconvex lens, and a sixth lens, which is a meniscus lens having a negative power and including a convex surface facing an image side. Each of the first to sixth lenses is a single spherical glass lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.