Imaging lens system
US9465193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2014 |
| Grant date | Oct 11, 2016 |
| Priority date | — |
| Expiry date | Aug 29, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens system includes a first lens to a fifth lens sequentially disposed from an object side to an image side. The first lens has a positive refractive power and an object side lens surface that is convex toward the object side. The second lens has a negative refractive power and a meniscus shape that is concave toward the image side. The third lens has a positive refractive power. The fourth lens has a negative refractive power and a meniscus shape that is concave toward the object side. The fifth lens has a negative refractive power and a meniscus shape that is concave toward the image side near an optical axis. The imaging lens system satisfies the following condition: f34/f<−5, where f denotes a focal length of the imaging lens system, and f34 denotes an effective focal length of the third lens and the fourth lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.