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Proceedings Paper

Real-time displacement and vibration measurements using a spatial phase-shifting technique
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Paper Abstract

Real-time displacement and vibration measurements are presented, Which are based on a spatial phase-shifting with a tilt holographic interferogram. Three intensity data sampled at every one-third of the fringe spacing of the tilt fringes are used to calculate the phase and the modulation term of the fringe which are functions of a displacement and a vibration amplitude, respectively. Three-dimensional look-up tables perform the calculations in a TV repetition rate to give a phase distribution and a new fringe profile which contours the vibration amplitude. Experimental results are given in two cases of a displacement measurement for a cantilever-like object and a vibration measurement at resonant frequencies of a flat speaker.

Paper Details

Date Published: 20 March 1997
PDF: 6 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269828
Show Author Affiliations
Suezou Nakadate, Tokyo Institute of Polytechnics (Japan)
Masaki Isshiki, Tokyo Institute of Polytechnics (Japan)


Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications
Fook Siong Chau; C. T. Lim, Editor(s)

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