Testing of a recently developed digital holographic method for very small amplitude measurements

0499547 - ÚFP 2019 RIV NL eng C - Conference Paper (international conference)
Lédl, Vít - Psota, Pavel - Doleček, Roman - Vít, Tomáš - Václavík, Jan
Testing of a recently developed digital holographic method for very small amplitude measurements.
Optical measurement techniques for structures & systems 2. Maastricht: Shaker publishing, 2013 - (Dirckx, J.; Buytaert, J.), s. 223-234. ISBN 978-90-423-0419-2.
[5th International Conference on Optical Measurement Techniques for Structures and Systems2. Antwerpy (BE), 04.04.2013-05.04.2013]
R&D Projects: GA MŠMT(CZ) ED2.1.00/03.0079
Institutional support: RVO:61389021
Keywords : vibrations * small amplitudes * digital holography * time average holography * frequency shifted holography * Doppler vibrometry * laser interferometry
OECD category: Electrical and electronic engineering

This paper shows the comparison of a vibration measurement simultaneously performed with three different methods on the same sample. The aim of the paper is to experimentally prove the capability of a newly developed method for the measurement of vibrations with amplitudes in a nanometre range. The newly developed method is based on frequency shifted time averaged digital holographic interferometry combined with phase shifting and the phase averaging principle. The methods used as a bench mark are Doppler vibrometry performed with a commercial single point vibrometer and a single point interferometer in a Michelson construction which is improved with the lock in principle. The results have been compared and very good agreements between the results are shown.
Permanent Link: http://hdl.handle.net/11104/0291741