Patent ID: 7089796
Filing Date: 2006-08-15
Classification: G01H

Abstract:
1. A system, comprising: an exciter disposed to impinge at least one exciter beam onto a remote mass to excite the mass; an optical probe disposed to impinge at least one optical beam onto a vibrating surface of the excited mass to be reflected thereby; a compensated laser vibrometer disposed to detect at least part of the optical beam reflected by the vibrating surface of the excited mass and configured to generate signals indicative of the surface vibrations, the vibrometer including an adaptive photodetector for detecting a plurality of speckles from the optical beam reflected by the vibrating surface of the excited mass; a processor configured to store and reverse the signals generated by the laser vibrometer; and a modulator configured to modulate the at least one exciter beam generated by the exciter in accordance with the reversed signals.