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8 September 1994 Measurement of inplane mechanical vibration by use of dynamic speckle
Ivan A. Popov, Nikolay V. Sidorovsky, Leonid M. Veselov
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Proceedings Volume 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1994) https://doi.org/10.1117/12.185327
Event: Vibration Measurements by Laser Techniques: First International Conference, 1994, Ancona, Italy
Abstract
The statistical properties of scattered coherent radiation from a rough body arbitrarily moving in its own plane are analyzed. Three cases of the optical geometry are considered: the free space, image plane of an optical system, and the focal plane of an optical system. The expressions for the space-time intensity correlation function and the corresponding power spectrum are derived. It is shown that in the case of small-amplitude vibrations, a contribution to the power spectrum of each mechanical vibration is proportional to the square of the mechanical vibration amplitude. An experiment carried out at (lambda) equals 0.63 micrometers by using the optical geometry of focal plane has verified the feasibility of noncontact measurement of mechanical vibration spectrum.
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Ivan A. Popov, Nikolay V. Sidorovsky, and Leonid M. Veselov "Measurement of inplane mechanical vibration by use of dynamic speckle", Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); https://doi.org/10.1117/12.185327
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KEYWORDS
Speckle
Correlation function
Free space
Free space optics
Statistical analysis
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