Dual beam Laser Doppler vibrometer with body vibration compensation

Summary from only given. We report on the development of a novel dual beam laser Doppler vibrometer (LDV) that can eliminate the perturbation due to the vibrometer body vibration. Since a residual laser beam from the beam splitter is used and decoupled from main laser beam and a least mean square adaptive algorithm is used to eliminate the perturbation due to the vibrometer body vibration, this dual beam LDV can be operated as an LDV with independent two object beam or an LDV with body vibration cancellation mechanism without any external reference surface.