Optical lens with variable focal length
US7864440B2 · kind B2 · utility
55Cited by
1References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 23, 2007 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Dec 8, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/004
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention concerns an optical lens comprising a cavity formed by two transparent windows and a peripheral frame positioned in between, said cavity containing first and second liquids, non miscible, forming an interface, said interface being movable by electrowetting on a wall of said peripheral frame by application of a voltage between first and second electrodes, wherein said wall has a non symmetrical revolution surface, the geometrical shape of which is calculated such that said interface is of a predetermined shape, for example substantially spherical, for at least one value of said voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.