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Proceedings Paper

A compact speckle interferometer for measuring low-amplitude low frequency motion
Author(s): James P. Ryle; Mohammed Al-Kalbani; Unnikrishnan Gopinathan; Gerard Boyle; Davis Coakley; John T. Sheridan
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Paper Abstract

Contact techniques exist to measure low amplitude low frequency mechanical vibration, however, by mechanically loading the system of interest, they affect the measured results. In this paper, we design a compact non-contact optical fiber speckle interferometer to measure inplane displacements. We implement this under laboratory conditions, and present our calibration results, measuring low-amplitude microvibrations from 0.34 nm to 1.5 μm over a frequency range from 10 Hz to 150 Hz.

Paper Details

Date Published: 25 April 2008
PDF: 11 pages
Proc. SPIE 6994, Photon Management III, 69940S (25 April 2008); doi: 10.1117/12.781852
Show Author Affiliations
James P. Ryle, Univ. College Dublin (Ireland)
Mohammed Al-Kalbani, St. James's Hospital (Ireland)
Unnikrishnan Gopinathan, Univ. College Dublin (Ireland)
Univ. Stuttgart (Germany)
Gerard Boyle, St. James's Hospital (Ireland)
Davis Coakley, St. James's Hospital (Ireland)
John T. Sheridan, Univ. College Dublin (Ireland)


Published in SPIE Proceedings Vol. 6994:
Photon Management III
John T. Sheridan; Frank Wyrowski, Editor(s)

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