Liquid-filled variable focus lens with band actuator
US5999328A · kind A · utility
118Cited by
10References
27Claims
0Family size
Inventors
Key dates
| Filing date | Nov 8, 1994 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Nov 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An actuating system for liquid-filled variable focus lenses of the type where the focus is adjusted by changing the spacing between a rigid lens and a distensible membrane. The actuating system involves a finger-operated positioner which drives an elongated flexible actuating member, i.e., a thin band, which is supported in a channel to prevent buckling. The band drives one or more actuating mechanisms which are located around the periphery of the lens and which provide a mechanical advantage so that the motion of the finger-operated positioner is in a comfortable range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.