Large displacement and deformation measurement by frequency sweeping digital holography

0499428 - ÚFP 2019 RIV CZ eng C - Conference Paper (international conference)
Psota, P. - Lédl, Vít - Kaván, František - Matoušek, O. - Doleček, R.
Large displacement and deformation measurement by frequency sweeping digital holography.
Proceedings of SPIE. Bellingham: SPIE: The Society of Photo-Optical Instrumentation Engineers, 2017, č. článku 106030C. ISBN 978-1-5106-0754-5.
[Conference on Photonics, Devices, and Systems VII. Praha (CZ), 28.08.2017-30.08.2017]
R&D Projects: GA MŠMT(CZ) LO1206; GA MŠMT(CZ) 8B16008
Institutional support: RVO:61389021
Keywords : Digital holography * Digital holographic interferometry * Displacement measurement * Absolute measurements
OECD category: Electrical and electronic engineering

Recently, a digital holographic method called Frequency Sweeping Digital Holography (FSDH) for high precision measurements of surface topography of mechanical parts has been introduced. The greatest advantage of the presented FSDH is the fact that the measurement is absolute. i.e. optical path difference is independently retrieved in every single pixel. This approach can therefore be used also for measurement of large displacements and deformation. FSDH is particularly suitable in cases where the common digital holographic methods fail due to e.g. 2π unambiguity problem or speckle decorrelation. Measurement method principles, setup details, an some features of the method are discussed.

Permanent Link: http://hdl.handle.net/11104/0291645