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Proceedings Paper

Analysis Of High Frequency Vibrations Using TV-Holography And Digital Image Processing
Author(s): S. Ellingsrud; O. J. Lokberg
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Paper Abstract

Objects that vibrate at frequencies higher than 1.0 MHz usually have vibration amplitudes far below the first fringe minimum (about X/5) of holographic detection. To get a complete phase and amplitude map of such high frequency vibrations we have combined phase modulation with phase shift techniques, using an electro-optic modulator and a digital image processor. Results showing the vibrations of a ceramic crystal (3.8 MHz), with a complete phase and amplitude map, are presented.

Paper Details

Date Published: 25 April 1990
PDF: 9 pages
Proc. SPIE 1162, Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series, (25 April 1990); doi: 10.1117/12.962767
Show Author Affiliations
S. Ellingsrud, Norwegian Institute of Technology (Norway)
O. J. Lokberg, Norwegian Institute of Technology (Norway)


Published in SPIE Proceedings Vol. 1162:
Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series
Ryszard J. Pryputniewicz, Editor(s)

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