Lens barrel of a zoom lens
US5011273A · kind A · utility
2Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Apr 12, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrel of a zoom lens is comprised of a plurality of lens groups securely held by respective movable lens holders, a stationary cam ring having one or more stationary cam slots, a movable cam ring having one or more movable cam slots and rotatably supported about the stationary cam ring, and one or more pins extending through the stationary cam ring and the movable cam ring for connecting the first and second movable lens holders to move them together at the time of zooming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.