Variable-focus lens and method of manufacturing the same
US7499223B2 · kind B2 · utility
19Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2006 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Jun 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a variable-focus lens (60) for focusing light rays in light paths passing through the lens along an optical axis (Δ). The lens comprises an arrangement of first and second immiscible liquids (67, 68) that have different refractive indices and are in contact over a moveable refractive optical interface (69), a volume of gas (72) in contact with one of said liquids, and a retention measure (70, 74) for keeping the volume of gas away from the light paths of the light rays passing through the lens for focusing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.