We present, for the first time to the best of our knowledge, a phase unwrapping method based on an algorithm which makes use of Greens first identity. This method aims at recovering the correct phase information encoded in a fringe pattern after digital holography (DH) numerical processing. DH provides a quantitative measurement of the three-dimensional surface profile of objects. The information about the profile can be obtained in principle from the phase-map. However, the measured phase-map provides the actual phase values wrapped mod.2p so that an unwrapping process is required in order to reconstruct the object profile.
Green s formulation for robust phase unwrapping in digital holography
Ferraro P;Grilli S;Sansone L;Coppola G;De Nicola S;Finizio A
2007
Abstract
We present, for the first time to the best of our knowledge, a phase unwrapping method based on an algorithm which makes use of Greens first identity. This method aims at recovering the correct phase information encoded in a fringe pattern after digital holography (DH) numerical processing. DH provides a quantitative measurement of the three-dimensional surface profile of objects. The information about the profile can be obtained in principle from the phase-map. However, the measured phase-map provides the actual phase values wrapped mod.2p so that an unwrapping process is required in order to reconstruct the object profile.File in questo prodotto:
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