Low-coherence speckle interferometry (LCSI) for detection of interfacial instabilities in adhesive-bonded joints

Kay Gastinger; Gerd Guelker; Klaus D. Hinsch; Hans Magne Pedersen; Trude Storen; Svein Winther

doi:10.1117/12.561204

2 August 2004 Low-coherence speckle interferometry (LCSI) for detection of interfacial instabilities in adhesive-bonded joints

Kay Gastinger, Gerd Guelker, Klaus D. Hinsch, Hans Magne Pedersen, Trude Storen, Svein Winther

Author Affiliations +

Proceedings Volume 5532, Interferometry XII: Applications; (2004) https://doi.org/10.1117/12.561204
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Kay Gastinger, Gerd Guelker, Klaus D. Hinsch, Hans Magne Pedersen, Trude Storen, and Svein Winther "Low-coherence speckle interferometry (LCSI) for detection of interfacial instabilities in adhesive-bonded joints", Proc. SPIE 5532, Interferometry XII: Applications, (2 August 2004); https://doi.org/10.1117/12.561204

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