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Microscopic 3-D Displacement Field Measurements using Digital Speckle Photography
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Paper Surface Centre. Karlstads universitet, Fakulteten för teknik- och naturvetenskap, Materialvetenskap. Karlstads universitet, Fakulteten för teknik- och naturvetenskap, Avdelningen för maskin- och materialteknik.
2004 (engelsk)Inngår i: Optics and Lasers in Engineering, 41, 767-777 (2004)Artikkel i tidsskrift (Fagfellevurdert)
Abstract [en]

A technique to measure object shape and 3-D displacement fields in micro-scale is offered by microscopic stereo digital speckle photography. The displacement of the random features that are often present on many engineering surfaces when viewed in a microscope is measured with the system, using image correlation. In this paper the equipment, physical model and calibration routines are described. The technique can be applied for sub-mm sized objects of arbitrary shape for small deformation fields. As a verifying experiment, an in-plane rotation of a flat calibration plate is presented. The expected in-plane errors are shown to be less than 0.1 ?m and the corresponding out-of-plane errors about three times larger. As a pilot experiment, micro-structural paper expansion is studied, when exposed to humidity. The scaling properties of the microscope as well as the sampling criteria and reliability of the system are discussed in detail

sted, utgiver, år, opplag, sider
2004.
Emneord [en]
Stereomicroscope, 3-D displacement field measurements, Digital speckle photography, DSP, Image correlation
HSV kategori
Forskningsprogram
Kemiteknik; Materialteknik
Identifikatorer
URN: urn:nbn:se:kau:diva-21467OAI: oai:DiVA.org:kau-21467DiVA, id: diva2:595141
Tilgjengelig fra: 2013-01-21 Laget: 2013-01-21 Sist oppdatert: 2013-01-21

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www.elsevier.com/wps/product/cws_home/405906http://dx.doi.org/10.1016/S0143-8166(03)00028-9

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