OPTICAL DEVICE HAVING A CONTINUOUS-CROWN-SHAPED PIEZOELECTRICALLY ACTUATED DEFORMABLE DIAPHRAGM

摘要

The invention relates to an optical device having a deformable diaphragm (2) comprising an area for attaching (2.3) onto a holder (1) containing a liquid or gaseous fluid, a central area (2.1) capable of being reversibly deformed from an inoperative position, and actuating means for moving the fluid (4) urging the diaphragm (2) into an intermediate area between the attachment area (2.3) and a central area (2.1). The actuating means comprise a continuous piezoelectric crown receiving a plurality of actuators, said crown surrounding the central area (2.1), the actuating means (5) being attached to the diaphragm (2) in at least the intermediate area (2.2), the actuating means (5) and the diaphragm (2) to which the same are attached forming at least one piezoelectric bimorph (B), the actuating means (5) contracting or extending radially during actuation so as produce a movement of said fluid (4) from the intermediate area (2.2) toward the central area (2.1) of the diaphragm or vice versa, thereby deforming the central area (2.1) relative to the inoperative position thereof.