Patent ID: 8363330

Claim:
Optical device comprising a membrane deformable in a reversible manner comprising a flexible film having at least one peripheral anchoring zone, a central zone, an intermediate zone between the central zone and the peripheral anchoring zone, the membrane being anchored at the level of its anchoring zone on a support and electrostatic actuating means with one or more fixed electrodes borne by the support and one or more movable parts, characterised in that the support and the membrane contribute to trapping a constant volume of liquid in contact with one of the faces of the film, the movable parts of the actuating means each being formed of a leg terminating on one side in a foot mechanically fastened to a film-fastening region located in the intermediate zone and terminating on the other side in a free end, the leg incorporating a movable electrode at least on the side of its free end, the actuation of the electrostatic actuating means from a rest position to a working position having the effect of attracting the movable electrode towards the fixed electrode which is placed facing and displacing the liquid located at the level of the fastening region towards the central zone so as to adjust the radius of curvature of the membrane.