|Publication No: 762||Search all ORC publications|
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
Southampton ePrint id: 78265
Copyright University of Southampton 2006