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Shape Measurement Based on Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics. Department of Physics and Electrical Engineering, Linnaeus University, V¨axj¨o 351 95, Sweden.
Department of Brain and Cognitive Engineering, Korea University, South Korea.
2018 (English)In: 2018 Progress In Electromagnetics Research Symposium (PIERS — Toyama), IEEE, 2018, p. 184-189Conference paper, Published paper (Refereed)
Abstract [en]

We present a dual-directional illumination digital holographic method to increase height range measurement with a reduced phase ambiguity. Small change in the illumination angle of incident introduce phase difference between the recorded complex fields. We decrease relative phase difference between the recorded complex field 279 and 139 times by changing the angle of incident 0.5° and 1°, respectively. A two cent Euro coin edge groove is used to measure the shape. The groove depth is measured as ≈ 300μm. Further, numerical re-focusing and analysis of speckle displacements in two different planes are used to measure the depth without a use of phase unwrapping process.

Place, publisher, year, edition, pages
IEEE, 2018. p. 184-189
Series
Progress in Electromagnetic Research Symposium (PIERS), E-ISSN 1559-9450
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-72847DOI: 10.23919/PIERS.2018.8597821ISI: 000458673700026Scopus ID: 2-s2.0-85060910902OAI: oai:DiVA.org:ltu-72847DiVA, id: diva2:1287689
Conference
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama), 1-4 August, 2018, 2018, Toyama, Japan
Note

ISBN för värdpublikation: 978-4-8855-2316-8, 978-1-5386-5455-2

Available from: 2019-02-11 Created: 2019-02-11 Last updated: 2020-09-15Bibliographically approved

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Khodadad, Davood

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