Zoom lens system and camera incorporating the same
US7184221B2 · kind B2 · utility
7Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2003 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | May 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/1465
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system, with a new structure that exhibits high optical performance over the entirety of a zoom range and the entirety of a focusing range, is disclosed. This zoom lens system comprises, in order from an object side to an image side: a front lens group which includes a plurality of lens units that move during zooming; a lens unit with negative optical power which moves during zooming and moves towards the object side during focusing from an infinity object to a close-distance object; and a lens unit with positive optical power which does not move for zooming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.