Zoom lens apparatus
US6104551A · kind A · utility
8Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 1999 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | May 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens apparatus moves the first lens group and the second lens group by rotating a zoom cam cylinder with cam grooves formed thereon. A plurality of forcing members uniformly forces first cam followers, which are provided on a lens supporting frame for the first lens group, against one sides of the cam grooves. Likewise, the plurality of forcing members uniformly forces second cam followers, which are provided on a lens supporting frame for the second lens group, against the other sides of the cam grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.