Frequency Shifted Digital Holography for the Measurementof Vibration with Very Small Amplitudes

0357974 - ÚFP 2011 RIV US eng C - Conference Paper (international conference)
Lédl, Vít - Václavík, Jan - Doleček, R. - Kopecký, V.
Frequency Shifted Digital Holography for the Measurementof Vibration with Very Small Amplitudes.
AIP Conference Proceedings 9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course. Vol. 1253. Melville: American Institute of Physics, 2010 - (Tomasini, E.), s. 415-419. AIP, 1253. ISBN 978-0-7354-0802-9. ISSN 0094-243X.
[International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course/9th./. Ancona (IT), 22.06.2010-25.06.2010]
R&D Projects: GA AV ČR 1QS100820502
Institutional research plan: CEZ:AV0Z20430508
Keywords : small vibration amplitudes * frequency shifted * digital holography
Subject RIV: BH - Optics, Masers, Lasers
http://link.aip.org/link/?APCPCS/1253/415/1

A method for measurements of nanometer-scale vibrations based on frequency shifted time average digital holographic interferometry employing the principle of the phase shifting technique is presented. This approach allows a reduction of noise and results in a higher sensitivity. The method has been applied to study the normalized vibration amplitude and the structure of vibration modes of piezoelectric transformers and actuators. In addition, quantitative information on the vibration amplitudes has been obtained in some cases.
Permanent Link: http://hdl.handle.net/11104/0196132