Lens drive mechanism using an electro-mechanical transducer
US5633763A · kind A · utility
16Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Jul 6, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for driving a collapsible lens mount having several telescoping segments includes, for each movable segment, a transducer that expands and contracts responsive to a wave pulse and a drive shaft coupled to the transducer. By varying the wave pulse conditions, the expansion and contraction are made to occur at different rates. A coupling member on each segment frictionally engages the drive shaft and transmits movement of the drive shaft during relatively slow drive shaft movements to the lens segment. The apparatus may also include a lens hood driven by the transducer and drive shaft apparatus of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.