Zoom lens system
US5168403A · kind A · utility
20Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1990 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Dec 6, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/1421
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system comprises from the object side, a front lens group having a refractive power of a predetermined sign and a rear lens group having a refractive power of different sign from that of the front lens group. The front lens group is shiftable along the optical axis of the lens system in a zooming operation, and movable perpendicularly to the optical axis for decreasing a blur caused by a hand shake. The rear lens group is shiftable along the optical axis in the zooming operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.