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Laser hole drilling process studied using laser speckle correlation
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.
Luleå tekniska universitet.
2006 (English)In: Speckle06: speckles, from grains to flowers ; 13 - 15 September 2006, Nimes, France ; [proceedings] / [ed] Pierre Slangen; Christine Cerruti, Bellingham, Wash.: SPIE - International Society for Optical Engineering, 2006, 63412M- p.Conference paper (Refereed)
Abstract [en]

This paper revisits defocused speckle correlation as a tool for measuring the response in metal sheets during percussion laser drilling processing. For the processing the 4th harmonic Nd:YAG wavelength (266 nm) was used in pulsed mode. It is shown that the method provides a cost efficient and robust alternative to speckle interferometry for the study of the small deformations that appear during laser processing. The accuracy was shown to be in the order of a few tens of μrads for the tilt component being measured which translates to a few nm in deflection when being spatially integrated. In the measurements deflections up to 50 nm was detected on the backside of silver and a copper sheet, respectively.

Place, publisher, year, edition, pages
Bellingham, Wash.: SPIE - International Society for Optical Engineering, 2006. 63412M- p.
Series
, Proceedings of SPIE, the International Society for Optical Engineering, ISSN 0277-786X ; 6341
Research subject
Experimental Mechanics; Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-34895DOI: 10.1117/12.695845Local ID: 93396380-e785-11db-8a98-000ea68e967bISBN: 9780819464262OAI: oai:DiVA.org:ltu-34895DiVA: diva2:1008147
Conference
Speckle 06 : 13/09/2006 - 15/09/2006
Note
Validerad; 2006; 20070410 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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