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Proceedings Paper

Speckle interferometers with matched wavefronts for measurement of vibrations and small displacements
Author(s): Vladimir P. Ryabukho; Vladimir L. Khomutov; Valery V. Tuchin
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Paper Abstract

The optical schemes of speckle interferometers for measurements of vibrations and microdisplacements that provide matching of interfering speckle fields are considered. Matching of wave fronts provides the maximal, on the average, magnitude of the output signal of the interferometer working in the mode of many speckles recording. It is shown that these interferometers with reference Gaussian beam operate in the mode of a confocal scheme and in the one-speckle mode of recording. In this case the photoreceiver aperture is determined by the reference beam aperture that is comparable with speckle sizes in the output field. The confocal scheme can be realized also using the reference speckle modulated beam and the multispeckle mode of recording. The schemes of differential speckle interferometers for investigations of longitudinal and transverse displacement are considered. The distinctions in statistical characteristics of the output signal of speckle interferometers with smooth and speckle-modulated reference waves are discussed.

Paper Details

Date Published: 14 June 1995
PDF: 10 pages
Proc. SPIE 2544, Interferometry VII: Techniques and Analysis, (14 June 1995); doi: 10.1117/12.211873
Show Author Affiliations
Vladimir P. Ryabukho, Saratov State Univ. and Mechanical Engineering Institute (Russia)
Vladimir L. Khomutov, Saratov State Univ. and Mechanical Engineering Institute (Russia)
Valery V. Tuchin, Saratov State Univ. and Mechanical Engineering Institute (Russia)

Published in SPIE Proceedings Vol. 2544:
Interferometry VII: Techniques and Analysis
Malgorzata Kujawinska; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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