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Shape verification using dual-wavelength holographic interferometry
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.ORCID iD: 0000-0002-7566-3656
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-8355-2414
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-4879-8261
2011 (English)In: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, E-ISSN 1560-2303, Vol. 50, no 10, article id 101503Article in journal (Refereed) Published
Abstract [en]

In automotive industry there is an interest of controlling the shape of a large number of identical components on-line in the manufacturing process. We propose a method to do this by capturing a digital hologram of the object and then using information from its computer aided design (CAD) model to calculate the shape and determine the agreement between the manufactured object and the CAD-model. The holographic recording of the object is done using dual wavelengths with a synthetic wavelength of approximately 400 μm. The optical measurement results in a wrapped phase map with the phase values in the interval [−π, π]. Each phase interval represents a depth distance on the object of about 0.2 mm. The phase unwrapping is done iteratively using information from the CADmodel. This implies that it is possible to measure large discontinuities on the surface of the measured object. The method also gives a point-to-point correspondence between the measurement and the CAD-model which is vital for tolerance control.

Place, publisher, year, edition, pages
2011. Vol. 50, no 10, article id 101503
Keywords [en]
Manufacturing engineering and work sciences - Manufacturing engineering
Keywords [sv]
Produktion och arbetsvetenskap - Produktionsteknik
National Category
Computational Mathematics Applied Mechanics
Research subject
Scientific Computing; Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-2402DOI: 10.1117/1.3572182ISI: 000296559700008Scopus ID: 2-s2.0-79959390403Local ID: 0051dd1e-3031-4492-a817-faa2657f141aOAI: oai:DiVA.org:ltu-2402DiVA, id: diva2:975254
Note
Validerad; 2011; 20110708 (berper)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Bergström, PerRosendahl, SaraGren, PerSjödahl, Mikael

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