Zoom lens and imaging device
US7505210B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2004 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Jul 2, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/173
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens has good optical performance, is compact, and has a high magnifying power, and is suitable for use in a video camera, a digital still camera, a cellular phone, or the like, and an image pickup apparatus employs the zoom lens. The zoom lens includes a first lens group fixed upon zooming and having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, and a fifth lens group having a positive refractive power, which are successively arranged in the order from the object side. At least the second lens group and the fourth lens group are moved for zooming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.