Optical device with a piezoelectrically actuated deformable membrane shaped as a continuous crown

摘要

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, actuating means for moving the fluid biasing the membrane into an intermediate area between the anchor area and the central area, the actuating means include a piezoelectric continuous crown accommodating several actuators, this crown surrounding the central area, the actuating means being anchored to the membrane in the intermediate area, the actuating means and the membrane to which they are anchored, forming at least one piezoelectric bimorph, the actuating means radially contracting or extending upon actuation to generate a movement of said fluid from the intermediate area to the central area of the membrane or vice versa, aiming at deforming the central area with respect to its rest position.

主权项

1. An optical device with a deformable membrane including an anchor area on a support for entrapping an amount of liquid or gas fluid, a central area reversibly deformable from a rest position, actuating means for moving the fluid biasing the membrane into an intermediate area between the anchor area and the central area, characterised in that the actuating means include a continuous crown of piezoelectric material accommodating one or several piezoelectric actuators each formed by a pair of electrodes sandwiching the continuous crown, this continuous crown being mounted about the central area without overlapping the same, the actuating means being anchored to the membrane at least in the intermediate area, the actuating means and the membrane to which they are anchored, forming at least one piezoelectric bimorph, the actuating means being integrated at least partially in the membrane and radially contracting or extending upon actuation so as to generate a movement of said fluid from the intermediate area to the central area of the membrane or vice versa, aiming at deforming the central area with respect to its rest position.