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A new, high sensitivity laser vibrometer
J.R.Baker*, R.I.Laming, T.H.Wilmshurst*, N.A.Halliwell**
Optical Fibre Group, Department of Electronics and Computer Science, University of Southampton, U.K.
* Institute of Sound and Vibration Research, University of Southampton, UK
** Dept. Mechanical Engineering, Loughborough University of Technology, UK
This paper introduces a new design of laser vibrometer which allows high sensitivity, noncontact measurement of normal-to-surface target motion. The design includes use of a retro-reflective tape covered PZT-element to remove the sign ambiguity in surface velocity, which is inherent in the form of Doppler detection used in laser vibrometers. Utilization of this element offers the potential for a compact, cost effective design, suitable for portable, on-site use in engineering situations.
Optics and Laser Technology (1990) Vol.22(4) pp.241-244
Copyright University of Southampton 2006