Twin-image noise reduction by phase retrieval in in-line digital holography

Loïc Denis (1) , Corinne Fournier (1) , Thierry Fournel (1) , Christophe Ducottet (1)

1 LHC - Laboratoire Hubert Curien

In-line digital holography conciles the applicative interest of a simple optical set-up with the speed, low cost and potential of digital reconstruction. We address the twin-image problem that arises in holography due to the lack of phase information in intensity measurements. This problem is of great importance in in-line holography where spatial elimination of the twin-image cannot be carried out as in off-axis holography. Applications in digital holography of particle fields greatly depend on its suppression to reach greater particle concentrations, keeping a sufficient signal to noise ratio in reconstructed images. We describe in this paper methods to improve numerically the reconstructed images by twin-image reduction. ©2005 COPYRIGHT SPIE

Domaines: Traitement du signal et de l'image [eess.SP]; Optique [physics.optics]; Traitement du signal et de l'image [eess.SP]

Loïc Denis, Corinne Fournier, Thierry Fournel, Christophe Ducottet. Twin-image noise reduction by phase retrieval in in-line digital holography. Wavelets XI, SPIE's Symposium on Optical Science and Technology, Aug 2005, San Diego, United States. pp.59140J, ⟨10.1117/12.617405⟩. ⟨ujm-00116996⟩