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Phase-derivative-based estimation of a digital reference wave from a single off-axis digital hologram
LuleƄ University of Technology.
2016 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 55, no 7, 1663-1669 p.Article in journal (Refereed) Published
Abstract [en]

This paper describes a method to obtain an estimated digital reference wave from a single off-axis digital hologram that matches the actual experimental reference wave as closely as possible. The proposed method is independent of a reference flat plate and speckles. The digital reference wave parameters are estimated directly from the recorded phase information. The parameters include both the off-axis tilt angle and the curvature of the reference wave. Phase derivatives are used to extract the digital reference wave parameters without the need for a phase unwrapping process. Thus, problems associated with phase wrapping are avoided. Experimental results for the proposed method are provided. The simulated effect of the digital reference wave parameters on the reconstructed image phase distribution is shown. The pseudo phase gradient originating from incorrect estimation of the digital reference wave parameters and its effect on object reconstruction are discussed.

Place, publisher, year, edition, pages
2016. Vol. 55, no 7, 1663-1669 p.
National Category
Signal Processing
Research subject
Technology (byts ev till Engineering)
Identifiers
URN: urn:nbn:se:lnu:diva-55811DOI: 10.1364/AO.55.001663OAI: oai:DiVA.org:lnu-55811DiVA: diva2:956022
Available from: 2016-08-29 Created: 2016-08-29 Last updated: 2016-08-29Bibliographically approved

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Khodadad, Davood
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CiteExportLink to record
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Citation style
  • apa
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