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Temporal phase-unwrapping algorithm for automated interferogram analysis
Cavendish Laboratory, University of Cambridge.
Luleå tekniska universitet.
1993 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 32, no 17, p. 3047-3052Article in journal (Refereed) Published
Abstract [en]

A new algorithm is proposed for unwrapping interferometric phase maps. Existing algorithms searchthe two-dimensional spatial domain for 2ir discontinuities: only one phase map is required, but phaseerrors can propagate outward from regions of high noise, corrupting the rest of the image. Analternative approach based on one-dimensional unwrapping along the time axis is proposed. It isapplicable to an important subclass of interferometry applications, in which a sequence of incrementalphase maps can be obtained leading up to the final phase-difference map of interest. A particularexample is quasi-static deformation analysis. The main advantages are (i) it is inherently simple, (ii)phase errors are constrained within the high-noise regions, and (iii) phase maps containing globaldiscontinuities are unwrapped correctly, provided the positions of the discontinuities remain fixed withtime. The possibility of real-time phase unwrapping is also discussed

Place, publisher, year, edition, pages
1993. Vol. 32, no 17, p. 3047-3052
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-8359DOI: 10.1364/AO.32.003047Scopus ID: 2-s2.0-0027789449Local ID: 6ddb83e0-02ae-11dc-ad0a-000ea68e967bOAI: oai:DiVA.org:ltu-8359DiVA, id: diva2:981251
Note
Godkänd; 1993; 20070515 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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