Twin removal in digital holography using diffuse illumination

Monaghan, David S. and Kelly, Damien P. and Pandey, Nitesh and Hennelly, Bryan M. (2009) Twin removal in digital holography using diffuse illumination. Optics Letters, 34 (23). pp. 3610-3612. ISSN 0146-9592

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A method to numerically remove the twin image for inline digital holography, using multiple digital holograms, is discussed. Each individual hologram is recorded by using a statistically independent speckle field to illuminate the object. If the holograms are recorded in this manner and then numerically reconstructed, the twin image appears as a different speckle pattern in each of the reconstructions. By performing specklereduction techniques the presence of the twin image can be greatly reduced. A theoretical model is developed, and experimental results are presented that validate this approach. We show experimentally that the dc object intensity term can also be removed by using this technique.

Item Type: Article
Additional Information: This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Keywords: Twin removal; digital holography; diffuse illumination;
Academic Unit: Faculty of Science and Engineering > Computer Science
Item ID: 2240
Depositing User: Dr. Bryan Hennelly
Date Deposited: 09 Nov 2010 16:47
Journal or Publication Title: Optics Letters
Publisher: Optical Society of America
Refereed: Yes
Funders: EC’s Seventh Framework Programme 2007–2013 under grant agreement 216105 , Science Foundation Ireland

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