Variable focal lens
US7245440B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2005 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Dec 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A variable focus lens comprises a chamber containing a conductive liquid (5) and an insulating liquid (4) of different refractive indices, the surface of contact between the two liquids forming a deformable refractive surface (6) whose periphery is caused to move along the walls of a housing under the effect of an electric voltage (V). The housing comprises an upper portion (16) inclined relative to a plane perpendicular to the optical axis (Δ) of the lens, a lower portion (34, 48, 52) more inclined than the upper portion and a zone of junction (B′) between the upper and lower portions, playing the role of a stop for the deformable refractive interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.