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Phase object data obtained from defocused laser speckle displacement
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-4879-8261
2004 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 43, no 16, p. 3229-34Article in journal (Refereed) Published
Abstract [en]

An optical technique that is based on defocused digital speckle photography is proposed for the evaluation of phase objects. Phase objects are different kinds of transparent or semi-transparent media that allow light to be transmitted. A phase object inserted in a laser speckle field introduces speckle displacement, from which information about the object may be extracted. It is shown that one may use speckle displacements to determine both the phase gradients and the positions of phase objects. As an illustration the positions and focal lengths of two weak lenses have been derived from defocused laser speckle displacement

Place, publisher, year, edition, pages
2004. Vol. 43, no 16, p. 3229-34
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-8102DOI: 10.1364/AO.43.003229ISI: 000221717800004Scopus ID: 2-s2.0-2942539080Local ID: 68dda540-6f73-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-8102DiVA, id: diva2:980992
Note
Validerad; 2004; 20060926 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Johansson, Eva-LenaBenckert, LarsSjödahl, Mikael

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