Zoom lens barrel
US6049432A · kind A · utility
21Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1999 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Apr 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens barrel includes at least two lens groups, a linear movement guide tube for guiding a linear movement of the lens groups along the optical axis and a cam tube for reciprocating the lens groups along the optical axis. The guide tube has a guiding portion formed on a film side end portion of the guide tube and extends in parallel with a film surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.