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Proceedings Paper

Adaptive correlation filtering of time-varying speckle pattern using photorefractive fanning effect
Author(s): Erik Raita; Alexei A. Kamshilin; Kimmo Paivasaari; Yuri N. Kulchin; Timo Jaeaeskelaeinen
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Paper Abstract

Novel technique of object's vibration monitoring is proposed. It is based on self-diffraction of the speckle pattern on adaptive correlation filter recorded in photorefractive crystal owing to the fanning effect. The technique provides linear response on the displacement amplitude and high sensitivity. Both sensitivity and dynamic range of measurements can be adjusted varying the average speckle size on the input face of crystal.

Paper Details

Date Published: 28 December 1998
PDF: 7 pages
Proc. SPIE 3684, Laser Optics '98: Nonlinear and Coherent Optics, (28 December 1998); doi: 10.1117/12.334842
Show Author Affiliations
Erik Raita, Univ. of Joensuu (Finland)
Alexei A. Kamshilin, Univ. of Joensuu (Finland)
Kimmo Paivasaari, Univ. of Joensuu (Finland)
Yuri N. Kulchin, Far Eastern State Technical Univ. (Russia)
Timo Jaeaeskelaeinen, Univ. of Joensuu (Finland)

Published in SPIE Proceedings Vol. 3684:
Laser Optics '98: Nonlinear and Coherent Optics
Vladimir E. Sherstobitov, Editor(s)

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