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Two wavelength simultaneous DSPI and DSP for 3D displacement field measurements
National University of Singapore.
National University of Singapore.
National University of Singapore.
National University of Singapore.
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2011 (English)In: Optics Communications, ISSN 0030-4018, E-ISSN 1873-0310, Vol. 284, no 10-11, p. 2437-2440Article in journal (Refereed) Published
Abstract [en]

A novel optical system is proposed that implements digital speckle pattern interferometry (DSPI) and digital speckle photography (DSP) simultaneously using two wavelength illumination of an object for simultaneous measurement of all three components of the displacement vector field. A collimated red light illuminates both the object and a reference surface in a DSPI configuration which is sensitive to out-of-plane displacement field while a blue light illuminates the object in a DSP configuration which is sensitive to in-plane displacement fields. A color 3-CCD camera records the red and blue lights individually through its red and blue channels, respectively. Two reference images and one image in the deformed state of the object are required for quantitative measurement. Experimental results are presented to validate the system.

Place, publisher, year, edition, pages
2011. Vol. 284, no 10-11, p. 2437-2440
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-3663DOI: 10.1016/j.optcom.2011.01.036ISI: 000289128600005Scopus ID: 2-s2.0-79952316409Local ID: 17ab62d2-ec21-4e33-82eb-94702763b668OAI: oai:DiVA.org:ltu-3663DiVA, id: diva2:976521
Note
Validerad; 2011; 20110211 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Sjödahl, Mikael

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