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Fibre vibrometer with three-phase fringe-analysis

Mark Johnson and Yves Delaporte
Optoelectronics Research Centre, University of Southampton, UK


A fiber-remoted, non-contact, optical surface-vibrometer which uses no source wavelength modulation is reported. Three-phase fringe sampling using a 3 X 3 fiber coupler and processing using a digital processor allow automatic multi-fringe unwrapping, sub-fringe interpolation and insensitivity to interferogram intensity and contrast variations. A noise-equivalent sensitivity of 50 μfringe/ √ Hz is demonstrated.

Optics Communications (1993) Vol.101(1-2) pp.1-4

doi: 10.1016/0030-4018(93)90312-S

Southampton ePrint id: 78265


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Copyright University of Southampton 2006