Optical device with deformable membrane
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United States of America Patent
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Apr 10, 2018
Issued Date -
N/A
app pub date -
Mar 24, 2015
filing date -
Mar 25, 2014
priority date (Note) -
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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.
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