Patent ID: 8072664

Claim:
A biaxial micro-electromechanical (MEMS) device comprising: a gimbal rotatable about a gimbal axis of rotation; a pair of gimbal torsion bars connected between the gimbal and a support, the gimbal torsion bars extending along the gimbal axis of rotation; a mirror plate rotatable about a mirror axis of rotation, the mirror axis of rotation being substantially perpendicular to the gimbal axis of rotation; a pair of mirror plate torsion bars connected between the mirror plate and the gimbal and extending along the mirror plate axis of rotation; one or more gimbal moment-of-inertia-altering blocks for altering the moment of inertia of the gimbal, each of the one or more gimbal moment-of-inertia-altering blocks having a center of mass positioned substantially away from the gimbal axis of rotation on a surface of the mirror plate; and one or more mirror plate moment-of-inertia-altering blocks for altering the moment of inertia of the mirror plate, each of the one or more mirror plate moment-of-inertia-altering blocks having a center of mass positioned substantially away from the mirror plate axis of rotation on a surface of the mirror plate, wherein a distance of the mirror plate moment-of-inertia-altering blocks from the mirror plate axis determines a resonant frequency of the biaxial MEMS device.