DEVICE FOR ELININATING PARASITIC ROTATIONS OF PIEZOELECTRIC MIRRORS IN LASER GYROMETERS

摘要

A device for eliminating parasitic rotations of mobile mirrors (15) of gyrolasers driven by piezoelectric ceramics (11). These parasitic rotations are caused by deformations of the external parts (12) which constitute the body of the mobile mirror and attached to the optical block (1) by the effect of the accelerations of the activating motion. These parasitic rotations are corrected in the invention by springs (24) attached to the external part of the gyrolaser, which abut on an external part of the piezoelectric mirror assembly farthest from the axis of activation of the gyrolaser and thereby correct the deformations of the external parts (12). The invention is applicable to all lasers and in particular to gyrolasers.