Patent ID: 8730549
Filing Date: 2014-05-20
Classification: G02B

Abstract:
1. A two-dimensional optical deflector comprising: a mirror; a movable frame supporting said mirror; a first piezoelectric actuator connected between said movable frame and said mirror and adapted to rock said mirror with respect to a first axis of said mirror; a support body supporting said movable frame; a second piezoelectric actuator connected between said support body and said movable frame and adapted to rock said mirror through said movable frame with respect to a second axis of said mirror; and at least one piezoelectric sensor provided on said movable frame and adapted to sense rocking vibrations of said mirror caused by said first and second piezoelectric actuators, wherein said first piezoelectric actuator comprises a pair of first meander-type piezoelectric actuators opposite to each other with respect to said second axis, each of said first meander-type piezoelectric actuators comprising a plurality of piezoelectric cantilevers folded at every cantilever and connected from said movable frame to said mirror, each of said piezoelectric cantilevers being in parallel with said second axis.