Patent ID: 7398019

Claim:
A control apparatus of an optical signal exchanger which includes a first mirror array and a second mirror array, each having a plurality of tilt mirrors arranged on a plane, each tilt mirror having a reflecting surface at an angle which is controllable, an input optical signal being sequentially reflected by said first and second mirror arrays to output at a specific position, at which power of an optical signal output at said specific position is detected, and feedback to control an angle of at least one of the reflecting surfaces of the tilt mirrors of said first and second mirror arrays, which have reflected the input optical signal, said control apparatus comprising: a resonance component removing section that removes a frequency component corresponding to a mechanical resonance action of changing the angle of any tilt mirror of the first and second mirror array, the frequency component being included in a control signal used for said feedback control, and said resonance component removing section is shared at least by a pair of driving electrodes arranged in an axial direction of any tilt mirror, selectively removing the frequency component corresponding to the mechanical resonance action for at least one of the pair of driving electrodes.