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Proceedings Paper

Measurement of vibration with low detection limit at audible frequencies
Author(s): Anastasius J.A. Bruinsma; E. J.J. Doppenberg; M. M. Joon; J. W. Verheij
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Paper Abstract

A Laser transducer has been designed and built which can be used for field measurement of structural vibrations in the audible frequency range. The main design features of the laser transducer are the use of Acousto-Optical Modulators for generation of a frequency offset in the interferometer the use of optical fibers and an increase of the modulation index of the offset frequency and the dynamic range of the frequency demodulator. A detection limit of 5lO ms ''/JHz was realized with this non-contact transducer which is much lower than that of commercially available instruments. 1 .

Paper Details

Date Published: 1 August 1990
PDF: 9 pages
Proc. SPIE 1266, In-Process Optical Measurements and Industrial Methods, (1 August 1990); doi: 10.1117/12.34681
Show Author Affiliations
Anastasius J.A. Bruinsma, TNO Institute of Applied Physics (Netherlands)
E. J.J. Doppenberg, TNO Institute of Applied Physics (Netherlands)
M. M. Joon, TNO Institute of Applied Physics (Netherlands)
J. W. Verheij, TNO Institute of Applied Physics (Netherlands)

Published in SPIE Proceedings Vol. 1266:
In-Process Optical Measurements and Industrial Methods
H. A. Macleod; Peter Langenbeck, Editor(s)

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