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Fast and robust automatic calibration for single-shot dual-wavelength digital holography based on speckle displacements
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.ORCID iD: 0000-0002-7566-3656
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-4879-8261
2015 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 54, no 16, p. 5003-5010Article in journal (Refereed) Published
Abstract [en]

The objective of this paper is to describe a fast and robust automatic single-shot dual-wavelength holographic calibration method that can be used for online shape measurement applications. We present a model of the correction in two terms for each lobe, one to compensate the systematic errors caused by off-axis angles and the other for the curvature of the reference waves, respectively. Each hologram is calibrated independently without a need for an iterative procedure or information of the experimental set-up. The calibration parameters are extracted directly from speckle displacements between different reconstruction planes. The parameters can be defined as any fraction of a pixel to avoid the effect of quantization. Using the speckle displacements, problems associated with phase wrapping is avoided. The procedure is shown to give a shape accuracy of 34 μm using a synthetic wavelength of 1.1 mm for a measurement on a cylindrical test object with a trace over a field of view of 18  mm×18  mm.

Place, publisher, year, edition, pages
2015. Vol. 54, no 16, p. 5003-5010
Keywords [en]
digital holography, Speckle imaging, Interferometry, metrology, calibration, surface measurement, multiplexing, single shot, Technology - Engineering physics
Keywords [sv]
Teknikvetenskap - Teknisk fysik
National Category
Applied Mechanics Computational Mathematics
Research subject
Experimental Mechanics; Scientific Computing
Identifiers
URN: urn:nbn:se:ltu:diva-10347DOI: 10.1364/AO.54.005003ISI: 000355555700009Scopus ID: 2-s2.0-84942372341Local ID: 924b8540-da35-4fa3-90a0-89f1ac2a9d3dOAI: oai:DiVA.org:ltu-10347DiVA, id: diva2:983289
Note
Validerad; 2015; Nivå 2; 20150522 (davkho)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Khodadad, DavoodBergström, PerHällstig, EmilSjödahl, Mikael

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