Monaghan, David S. and Kelly, Damien P. and Pandey, Nitesh and Hennelly, Bryan M.
Twin suppression in digital holography by means of speckle reduction.
CIICT 2009 : proceedings of the China-Ireland information and communications technologies conference.
National University of Ireland Maynooth, Ireland, pp. 237-240.
A method for numerically removing the twin image in on-axis digital holography, based on multiple digital holograms, is discussed. The digital holograms under examination are captured experimentally using an in-line modified Mach-Zehnder interferometric setup and subsequently reconstructed numerically. The technique is suitable for both transmission and reflection geometry. Each individual hologram is recorded with a statistically independent diffuse illumination field. This is achieved by shifting a glass diffuser in the x-y plane of the object path. By recording the holograms in this manner the twin image, from a numerical reconstruction, appears as speckle. By reducing this speckle pattern the twin image can be effectively removed in the reconstruction plane. A theoretical model is developed and experimental results are presented that validate this model.
||European Community's Seventh Framework Programme FP7/2007-2013 under grant agreement no. 216105. We also aknowledge support from Science Foundation Ireland (SFI).
||Digital Holography; On- Axis; Speckle; Twin reduction;
||Science & Engineering > Computer Science
||09 Mar 2011 15:37
||National University of Ireland Maynooth
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