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Proceedings Paper

Non-destructive testing of carbon reinforced plastics by means of phase retrieval
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Paper Abstract

We present an approach to inspect carbon reinforced plastic components which is based on phase retrieval using a liquid crystal spatial light modulator (SLM). The SLM is located in the Fourier domain of a 4f-imaging system and is used to modulate the incident light with the transfer function of propagation. This configuration allows for the recording of consecutive intensity measurements, with the wave field scattered by the investigated object in various propagation states across a common recording plane. In contrast to existing phase retrieval approaches, the measuring time is considerably reduced, since the switching time of the SLM is less than 50ms. This enables non-destructive testing under thermal load. Experimental results are presented which demonstrate that the approach can be used to assess structural properties of technical components made from carbon reinforced plastics.

Paper Details

Date Published: 11 September 2012
PDF: 5 pages
Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 841318 (11 September 2012); doi: 10.1117/12.978175
Show Author Affiliations
Mostafa Agour, Bremer Institut für angewandte Strahltechnik GmbH (Germany)
Claas Falldorf, Bremer Institut für angewandte Strahltechnik GmbH (Germany)
Christoph von Kopylow, Bremer Institut für angewandte Strahltechnik GmbH (Germany)
Ralf B. Bergmann, Bremer Institut für angewandte Strahltechnik GmbH (Germany)


Published in SPIE Proceedings Vol. 8413:
Speckle 2012: V International Conference on Speckle Metrology
Ángel Fernandez Doval; Cristina Trillo, Editor(s)

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