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Optical Engineering • Open Access

Dynamic properties of multispectral speckles in digital holography and image correlation
Author(s): Mikael Sjodahl

Paper Abstract

I discuss dynamic properties of multispectral speckle in the context of digital holographic interferometry and image correlation. I outline the correlation of speckles in free space, in an imaging system, and, in the case of interferometric detection, caused by reflection off an inclined diffuse surface. It is shown that interferometric phase gradients and speckle movements are closely related where in fact the phase gradients are the generator of speckle movements in a defocused plane. The theory is exemplified by three typical situations encountered in image-plane digital holographic interferometry.

Paper Details

Date Published: 23 May 2013
PDF: 9 pages
Opt. Eng. 52(10) 101908 doi: 10.1117/1.OE.52.10.101908
Published in: Optical Engineering Volume 52, Issue 10
Show Author Affiliations
Mikael Sjodahl, Luleå Univ. of Technology (Sweden)

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