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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 13 — Jul. 1, 2013
  • pp: 2203–2205

Investigation of composite materials using SLM-based phase retrieval

Mostafa Agour, Claas Falldorf, and Ralf B. Bergmann  »View Author Affiliations


Optics Letters, Vol. 38, Issue 13, pp. 2203-2205 (2013)
http://dx.doi.org/10.1364/OL.38.002203


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Abstract

We present a robust method to inspect a typical composite material constructed of carbon fiber reinforced plastic (CFRP). It is based on optical surface contouring using the spatial light modulator (SLM)-based phase retrieval technique. The method utilizes multiple intensity observations of the wave field, diffracted by the investigated object, captured at different planes along the optical axis to recover the phase information across the object plane. The SLM-based system allows for the recording of the required consecutive intensity measurements in various propagation states across a common recording plane. This overcomes the mechanical shifting of a camera sensor required within the capturing process. In contrast to existing phase retrieval approaches, the measuring time is considerably reduced, since the switching time of the SLM is less than 50 ms. This enables nondestructive testing under thermal load. Experimental results are presented that demonstrate the approach can be used to assess structural properties of technical components made from CFRP.

© 2013 Optical Society of America

OCIS Codes
(100.5070) Image processing : Phase retrieval
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Image Processing

History
Original Manuscript: March 15, 2013
Revised Manuscript: May 9, 2013
Manuscript Accepted: May 10, 2013
Published: June 19, 2013

Citation
Mostafa Agour, Claas Falldorf, and Ralf B. Bergmann, "Investigation of composite materials using SLM-based phase retrieval," Opt. Lett. 38, 2203-2205 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-13-2203


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