OPTICAL DEVICE WITH PIEZOELECTRICALLY ACTUATED DEFORMABLE MEMBRANE SHAPED AS CONTINUOUS CROWN

摘要

PROBLEM TO BE SOLVED: To provide an optical device with a deformable membrane including: an anchor area on a support entrapping a liquid or gas fluid; a central area reversibly deformable from a rest position; and actuating means for moving the fluid by biasing the membrane in an intermediate area between the anchor area and the central area.SOLUTION: The actuating means includes a piezoelectric continuous crown accommodating several actuators. The crown surrounds the central area. The actuating means is anchored to the membrane in at least the intermediate area. The actuating means and the membrane to which it is anchored form at least one piezoelectric bimorph. The actuating means radially contracts or extends upon actuation so as to generate a movement of said fluid either from the intermediate area to the central area of the membrane or reversely, aiming at deforming the central area with respect to the rest position of the membrane.