Advances in phase-stepping real-time holography using photorefractive sillenite crystals
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Data
2006-01-01
Autores
Gesualdi, M. R.R.
Barbosa, E. A. [UNESP]
Muramatsu, M.
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Resumo
This work presents a review of recent developments in phase-stepping real-time holographic interferometry with photorefractive sillenite crystals. Quantitative results are shown in micro-rotation, micro-displacement, and microdeformation measurements, and in wave-optics and surface analysis as well. The phase stepping was carried out in a four-frame process and the resulting phase map was unwrapped by applying a sin/cos filter. The experimental results are in good agreement with the ones obtained through other means, showing the promising potentialities of phase-stepping real-time holographic interferometry for in situ visualisation, monitoring and analysis in non-destructive testing.
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Holography, Interferometry, Phase shifting
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Journal of Optoelectronics and Advanced Materials, v. 8, n. 4, p. 1574-1583, 2006.