Actuation mechanism for variable focal length spectacles
US6053610A · kind A · utility
31Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1999 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jul 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/081
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An actuating mechanism for spectacles which include two variable focal length lens units. Each lens unit is fitted with a coupling member which extends from the lens unit into the bridge of the spectacles. A linearly-movable finger-operated slider, having a finger pad extending above the bridge, causes a cam within the bridge to rotate as it is moved, the cam being coupled to the coupling members causing them to move and the focal length of the lens units thereby to change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.