Optical device with deformable membrane
US9939559B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2015 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Mar 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device having variable focal length may include a deformable membrane, a support to which a peripheral anchoring area of said membrane is connected, and a cavity filled with a constant volume of fluid. The cavity being delimited by the membrane, a base opposite the membrane and a wall of the support extending between the base and the membrane. The optical device further includes an actuation device of a region of the membrane located between the peripheral anchoring area and a central part of the membrane, configured to bend said membrane by application of electrical actuation voltage so as to displace some of the volume of fluid. The membrane comprises a stiffening structure comprising cells which delimit, in the central part of said membrane, at least two deformable regions each constituting a diopter of a respective elementary optical system, each elementary optical system comprising said respective deformable region of the membrane, the fluid and the base of the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.