Zoom lens barrel
US5144494A · kind A · utility
17Cited by
7References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Feb 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens barrel having an adjusting ring connected to a cam ring through a gear ring. The cam ring is rotatably supported by a stationary cylinder in which some of the lens groups are housed. The gear ring is fixed to the cam ring. The stationary cylinder is provided with the adjusting ring, which is movable relative to the stationary cylinder and along the optical axis. The adjusting ring is connected to the cam ring in such a manner that the adjusting ring and the cam ring can be rotated relative to each other and can be moved along the optical axis as a single body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.