Method for superposing reconstructed images from digital holograms of the same object recorded at different distance and wavelength

Year: 2006

Authors: Alfieri D., Coppola G., De Nicola S., Ferraro P., Finizio A., Pierattini G., Javidi B.

Autors Affiliation: Istituto di Cibernetica “E. Caianiello” del CNR, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Istituto per la Microelettronica e i Microsistemi del CNR, Via P. Castellino 111, 80134 Napoli, Italy;
CNR – Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
University of Connecticut, ECE Department, Storrs, CT, 06269-2157, USA

Abstract: A method for allowing direct perfect superimposition and comparison of Fresnel-transform reconstructions of digital holograms recorded of the same object at different distances and wavelengths is proposed and demonstrated. The method takes into account the dependence of the reconstruction pixel on the distance and the wavelength by the Fresnel-transform algorithm. The method avoids the need for image scaling at the end of the reconstruction process that usually is performed in multi-wavelength digital holography. Demonstration is given by superposing the numerical reconstructions of holograms recorded at different distances and wavelengths. The method can be potentially very useful for real-time monitoring in biological processes or for recognition and ranging by multiple wavelengths of a target with fast movements or finally for very fast investigation and study of very fast processes. (c) 2005 Elsevier B.V. All rights reserved.

Journal/Review: OPTICS COMMUNICATIONS

Volume: 260 (1)      Pages from: 113  to: 116

More Information: art of this work was performed while P. Ferraro was at the University of Connecticut supported by the Consiglio Nazionale delle Ricerche short-term mobility program. Part of the work was also funded by the Centro Regionale di Competenza POR Campania INNOVA.
KeyWords: digital holograms
DOI: 10.1016/j.optcom.2005.10.055

Citations: 34
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