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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 9 — Sep. 26, 2007

Phase map retrieval in digital holography: avoiding the undersampling effect by a lateral shear approach

P. Ferraro, C. Del Core, L. Miccio, S. Grilli, S. De Nicola, A. Finizio, and G. Coppola  »View Author Affiliations


Optics Letters, Vol. 32, Issue 15, pp. 2233-2235 (2007)
http://dx.doi.org/10.1364/OL.32.002233


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Abstract

In digital holography (DH) the numerical reconstruction of the whole wavefront allows one to extract the wrapped phase map mod, 2 π . It can occur that the reconstructed wrapped phase map in the image plane is undersampled because of the limited pixel size in that plane. In such a case the phase distribution cannot be retrieved correctly by the usual unwrapping procedures. We show that the use of the digital lateral-shearing interferometry approach in DH provides the correct reconstruction of the phase map in the image plane, even in extreme cases where the phase profile changes very rapidly. We demonstrate the effectiveness of the method in a particular case where the profile of a highly curved silicon microelectromechanical system membrane has to be reconstructed.

© 2007 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(100.2000) Image processing : Digital image processing
(100.3010) Image processing : Image reconstruction techniques
(110.1650) Imaging systems : Coherence imaging

ToC Category:
Image Processing

History
Original Manuscript: January 31, 2007
Revised Manuscript: April 19, 2007
Manuscript Accepted: June 3, 2007
Published: July 24, 2007

Virtual Issues
Vol. 2, Iss. 9 Virtual Journal for Biomedical Optics

Citation
P. Ferraro, C. Del Core, L. Miccio, S. Grilli, S. De Nicola, A. Finizio, and G. Coppola, "Phase map retrieval in digital holography: avoiding the undersampling effect by a lateral shear approach," Opt. Lett. 32, 2233-2235 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-32-15-2233

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