Publication No: 463

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

Abstract

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

doi: 10.1016/0030-3992(90)90054-8

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