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Microscopic 3-D Displacement Field Measurements using Digital Speckle Photography
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Paper Surface Centre. Karlstad University, Faculty of Technology and Science, Materials Science. Karlstad University, Faculty of Technology and Science, Department of Mechanical and Materials Engineering.
2004 (English)In: Optics and Lasers in Engineering, 41, 767-777 (2004)Article in journal (Refereed)
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

Place, publisher, year, edition, pages
Keyword [en]
Stereomicroscope, 3-D displacement field measurements, Digital speckle photography, DSP, Image correlation
National Category
Chemical Engineering Materials Engineering
Research subject
Chemical Engineering; Materials Engineering
URN: urn:nbn:se:kau:diva-21467OAI: diva2:595141
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2013-01-21

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Thuvander, Fredrik
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Paper Surface CentreMaterials ScienceDepartment of Mechanical and Materials Engineering
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