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Proceedings Paper

Low-coherence speckle interferometry (LCSI) for detection of interfacial instabilities in adhesive-bonded joints
Author(s): Kay Gastinger; Gerd Guelker; Klaus D. Hinsch; Hans Magne Pedersen; Trude Storen; Svein Winther
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Paper Abstract

In this paper the basic principles of Low Coherence Speckle Interferometry (LCSI) are described. Theoretical background and experimental results for the systematic investigation of LCSI are presented. To understand and quantify the measurement results of adhesive bonded joints a modelling of the interference signal is required. For this purpose, a one-dimensional transmission line model is developed, including changes in the refractive index in a stressed adhesive layer and delamination of the glued interface. A new method for the detection of zero path length difference is introduced. Investigations of the probing depth in semi-transparent adhesive and recent experimental results of the characterisation of adhesive-bonded aluminium joints are presented.

Paper Details

Date Published: 2 August 2004
PDF: 12 pages
Proc. SPIE 5532, Interferometry XII: Applications, (2 August 2004); doi: 10.1117/12.561204
Show Author Affiliations
Kay Gastinger, SINTEF ICT (Norway)
Gerd Guelker, Carl von Ossietzky Univ. Oldenburg (Germany)
Klaus D. Hinsch, Carl von Ossietzky Univ. Oldenburg (Germany)
Hans Magne Pedersen, Norwegian Univ. of Science and Technology (Norway)
Trude Storen, Norwegian Univ. of Science and Technology (Norway)
Svein Winther, SINTEF ICT (Norway)


Published in SPIE Proceedings Vol. 5532:
Interferometry XII: Applications
Wolfgang Osten; Erik Novak, Editor(s)

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