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Shape Measurement Based on Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements
Department of Physics and Electrical Engineering, Linnaeus University, Växjö, Sweden.ORCID iD: 0000-0003-2960-3094
Department of Brain and Cognitive Engineering, Korea University, Seoul, South Korea.
2018 (English)In: 2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama), Electromagnetics Academy , 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
Electromagnetics Academy , 2018. p. 184-189
Series
Progress in Electromagnetics Research Symposium, ISSN 1559-9450
Keywords [en]
height measurement, holographic interferometry, shape measurement, speckle, shape measurement, height range measurement, reduced phase ambiguity, illumination angle, relative phase difference, cent Euro coin edge groove, speckle displacements, complex field, reduced phase dual-directional illumination digital holography, groove depth, numerical refocusing, Speckle, Lighting, Phase measurement, Shape measurement, Shape, Holography
National Category
Atom and Molecular Physics and Optics Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:oru:diva-72606DOI: 10.23919/PIERS.2018.8597821ISI: 000458673700026Scopus ID: 2-s2.0-85060910902OAI: oai:DiVA.org:oru-72606DiVA, id: diva2:1290075
Conference
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama), Toyama, Japan, August 1-4, 2018
Available from: 2019-02-19 Created: 2019-02-19 Last updated: 2019-03-07Bibliographically approved

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Khodadad, Davood

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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