Adaptive correlation filtering of time-varying speckle pattern using photorefractive fanning effect

Erik Raita; Alexei A. Kamshilin; Kimmo Paivasaari; Yuri N. Kulchin; Timo Jaeaeskelaeinen

doi:10.1117/12.334842

28 December 1998 Adaptive correlation filtering of time-varying speckle pattern using photorefractive fanning effect

Erik Raita, Alexei A. Kamshilin, Kimmo Paivasaari, Yuri N. Kulchin, Timo Jaeaeskelaeinen

Proceedings Volume 3684, Laser Optics '98: Nonlinear and Coherent Optics; (1998) https://doi.org/10.1117/12.334842
Event: Laser Optics '98, 1998, St. Petersburg, Russian Federation

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.

Citation Download Citation

Erik Raita, Alexei A. Kamshilin, Kimmo Paivasaari, Yuri N. Kulchin, and Timo Jaeaeskelaeinen "Adaptive correlation filtering of time-varying speckle pattern using photorefractive fanning effect", Proc. SPIE 3684, Laser Optics '98: Nonlinear and Coherent Optics, (28 December 1998); https://doi.org/10.1117/12.334842

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