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
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.
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