Abstract
Powell and Stetson1 have shown that holography can be used to study the vibration modes of a surface. The technique they employed was to record a hologram while the surface was actually vibrating. The reconstructed image from such a hologram varies in brightness with the total excursion of the surface movement, and gives a kind of “time-averaged” contour map of the vibration amplitude. We wish to report a method of real-time analysis of the surface shape and to demonstrate its advantages.
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References
Powell, R. L., and Stetson, K. A., J. Opt. Soc. Amer., 55, 1593 (1965).
Stetson, K. A., and Powell, R. L., J. Opt. Soc. Amer., 55, 1694 (1965).
Collier, R. J., Doherty, E. T., and Pennington, K. S., App. Phys. Lett., 7, 223 (1965).
Burch, J. M., Ennos, A. E., and Wilton, R. J., Nature, 209, 1015 (1966).
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ARCHBOLD, E., ENNOS, A. Observation of Surface Vibration Modes by Stroboscopic Hologram Interferometry. Nature 217, 942–943 (1968). https://doi.org/10.1038/217942a0
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DOI: https://doi.org/10.1038/217942a0
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