Monaghan, David S. and Kelly, Damien P. and Pandey, Nitesh and Hennelly, Bryan M. (2009) Twin suppression in digital holography by means of speckle reduction. In: CIICT 2009 : proceedings of the China-Ireland information and communications technologies conference. National University of Ireland Maynooth, Ireland, pp. 237-240. ISBN 9780901519672

Download (381kB)

Abstract

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.

Item Type:	Book Section
Additional Information:	European Community's Seventh Framework Programme FP7/2007-2013 under grant agreement no. 216105. We also aknowledge support from Science Foundation Ireland (SFI).
Keywords:	Digital Holography; On- Axis; Speckle; Twin reduction;
Academic Unit:	Faculty of Science and Engineering > Computer Science
Item ID:	2471
Depositing User:	CS Editor
Date Deposited:	09 Mar 2011 15:37
Publisher:	National University of Ireland Maynooth
Refereed:	Yes
Funders:	European Community Seventh Framework Programme, Science Foundation Ireland
URI:
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

Repository Staff Only(login required)

Item control page

Downloads

Origin of downloads