Zoom lens mechanism with focus camming mechanism
US5751500A · kind A · utility
7Cited by
17References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Jul 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens assembly (10) includes a plurality of cam barrels (18, 38, 66) which rotate together within non-rotating lens barrels (12, 34, 54) as the assembly is extended and contracted. A compact focusing mechanism (92-156) travels with the innermost cam barrel (66).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.