Patent ID: 8542445

Claim:
An optical device with a deformable membrane comprising: a peripheral area which is anchored in a sealed manner on a support helping to contain a constant volume of liquid in contact with a rear face of the membrane, said peripheral area is an anchoring area that is a sole area of the membrane that is anchored on the support; a substantially central area, configured to be deformed reversibly from a rest position; and an actuation device that displaces the liquid in the central area, stressing the membrane in at least one area situated strictly between the central area and the anchoring area, wherein the actuation device is electrostatic and comprises at least one pair of opposing electrodes, one of the electrodes of the pair being at a level of the rear face of the membrane or buried in the membrane, the other being at a level of the support, the electrodes being separated by dielectric, the dielectric being formed at least by the liquid.