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

Mostafa Agour; Claas Falldorf; Christoph von Kopylow; Ralf B. Bergmann

doi:10.1117/12.978175

11 September 2012 Non-destructive testing of carbon reinforced plastics by means of phase retrieval

Mostafa Agour, Claas Falldorf, Christoph von Kopylow, Ralf B. Bergmann

Proceedings Volume 8413, Speckle 2012: V International Conference on Speckle Metrology; 841318 (2012) https://doi.org/10.1117/12.978175
Event: SPECKLE 2012: V International Conference on Speckle Metrology, 2012, Vigo, Spain

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.

Citation Download Citation

Mostafa Agour, Claas Falldorf, Christoph von Kopylow, and Ralf B. Bergmann "Non-destructive testing of carbon reinforced plastics by means of phase retrieval", Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 841318 (11 September 2012); https://doi.org/10.1117/12.978175

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