Patent ID: 6285485
Filing Date: 2001-09-04
Classification: G02B,H02K

Abstract:
A micromechanical scanner comprising a rotor, a suspension system, and a stator; wherein:(a) said rotor comprises a rigidly affixed mirror, and said rotor is not adapted to be directly connected to an electrical power supply or to an electrostatic power supply;(b) said suspension system connects said rotor to said stator, wherein said suspension system permits rotational deflection of said rotor when torque is applied to said rotor;(c) said stator comprises a frame to support said suspension system, and thereby to support said rotor;(d) said rotor is adapted to oscillate rotationally in response to an external actuation torque produced by an oscillating magnetic field;(e) said rotor comprises an electrically conducting coil, wherein said coil is not adapted to be directly connected to an electrical power supply, and wherein an electric current may be induced in said coil in response to a varying magnetic field;whereby, in the presence of first and second magnetic fields, wherein the second magnetic field is an alternating or oscillating magnetic field, the second magnetic field induces an alternating electric current in said coil; whereby the interaction of the induced alternating electric current and the first magnetic field produces an alternating torque on said rotor; whereby said rotor oscillates.