Zoom lens device
US7304804B2 · kind B2 · utility
1Cited by
11References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2003 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Aug 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/177
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens device has a zoom lens system having a plurality of lens units; and an image sensor converting an optical image formed by the zoom lens system, into electric image data. Lens surfaces constituting the zoom lens system are all refracting surfaces. Zooming is performed by varying the distances between the lens units. The following conditions are satisfied:3.1≦ft/fw≦5.5 where fw is the focal length of the zoom lens system in the shortest focal length condition, and ft is the focal length of the zoom lens system in the longest focal length condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.