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Phase object data obtained by pulsed TV holography and 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. 3235-3240Article in journal (Refereed) Published
Abstract [en]

Transient events in optically transparent media occur in many engineering applications. Using pulsed TV holography to capture a laser speckle field propagated through an optical disturbance makes it possible to obtain both the position and the phase gradients of the disturbance. The technique depends on the fact that speckles transmitted through an optical disturbance will be displaced by an amount that depends on the relation of the defocus to the object. First the speckle field is captured holographically, without and with disturbance present. Then the recorded fields are numerically refocused in a computer to a number of different focal planes. With a cross-correlation technique a number of speckle displacement fields are obtained, and from them the data about the disturbance are obtained. So far the technique has been shown to work for thin objects

Place, publisher, year, edition, pages
2004. Vol. 43, no 16, p. 3235-3240
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-6897DOI: 10.1364/AO.43.003235ISI: 000221717800005Scopus ID: 2-s2.0-2942538592Local ID: 53a954d0-6f73-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-6897DiVA, id: diva2:979783
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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