Analysis Of High Frequency Vibrations Using TV-Holography And Digital Image Processing

S. Ellingsrud; O. J. Lokberg

doi:10.1117/12.962767

25 April 1990 Analysis Of High Frequency Vibrations Using TV-Holography And Digital Image Processing

S. Ellingsrud, O. J. Lokberg

Proceedings Volume 1162, Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series; (1990) https://doi.org/10.1117/12.962767
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

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.

Citation Download Citation

S. Ellingsrud and O. J. Lokberg "Analysis Of High Frequency Vibrations Using TV-Holography And Digital Image Processing", Proc. SPIE 1162, Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series, (25 April 1990); https://doi.org/10.1117/12.962767

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