25 April 2008 A compact speckle interferometer for measuring low-amplitude low frequency motion
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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.
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James P. Ryle, James P. Ryle, Mohammed Al-Kalbani, Mohammed Al-Kalbani, Unnikrishnan Gopinathan, Unnikrishnan Gopinathan, Gerard Boyle, Gerard Boyle, Davis Coakley, Davis Coakley, John T. Sheridan, John T. Sheridan, } "A compact speckle interferometer for measuring low-amplitude low frequency motion", Proc. SPIE 6994, Photon Management III, 69940S (25 April 2008); doi: 10.1117/12.781852; https://doi.org/10.1117/12.781852
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