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Proceedings Paper

Comparative displacement measurement by digital holographic interferometry
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Paper Abstract

Digital holography is a powerful tool in NDT. Different measuring methods have been developed to perform more flexible measurements and to alleviate the drawbacks of this technique. The rapid development of spatial light modulators in the past few years opened an exciting new area in coherent optical metrology. Commercially available liquid crystal spatial light modulators (SLM's) are capable to optically reconstruct digital holograms in good quality, so the reconstructed real image of an object can be used as a coherent illuminating mask in optical measurement methods like digital holography. Combination of digital holography and TV holography (ESPI) is also possible. In the present work five methods of digital holography are investigated which are able to implement comparative measurement. Both the experimental arrangements and measuring results are presented.

Paper Details

Date Published: 10 September 2004
PDF: 12 pages
Proc. SPIE 5457, Optical Metrology in Production Engineering, (10 September 2004); doi: 10.1117/12.546707
Show Author Affiliations
Janos Kornis, Budapest Univ. of Technology and Economics (Hungary)
Balazs Gombkoto, Budapest Univ. of Technology and Economics (Hungary)
Zoltan Fuzessy, Budapest Univ. of Technology and Economics (Hungary)

Published in SPIE Proceedings Vol. 5457:
Optical Metrology in Production Engineering
Wolfgang Osten; Mitsuo Takeda, Editor(s)

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