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

S. Ellingsrud; O. J. Lokberg

doi:10.1117/12.962348

30 January 1990 Analysis Of High Frequency Vibrations Using TV-Holography And Digital Image Processing

S. Ellingsrud, O. J. Lokberg

Proceedings Volume 1153, Applications of Digital Image Processing XII; (1990) https://doi.org/10.1117/12.962348
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 λ/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.

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S. Ellingsrud and O. J. Lokberg "Analysis Of High Frequency Vibrations Using TV-Holography And Digital Image Processing", Proc. SPIE 1153, Applications of Digital Image Processing XII, (30 January 1990); https://doi.org/10.1117/12.962348

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KEYWORDS

Crystals

Phase modulation

Digital image processing

Phase shift keying

Image processing

Speckle

Modulation

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