New analytical expression for speckle contrast of spectral light broadening

A new analytical expression for the average speckle contrast is derived for surfaces of random roughness at reflection. Rayleigh and Simpson phase probability density distributions of non-zero phase mean value are assumed for the roughness of the surface. The behavior of a speckle contrast with a ro...

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Bibliographic Details
Published inJournal of optics (2010) Vol. 20; no. 1; pp. 15602 - 15611
Main Authors El-Nicklawy, M M, Abd-Rabou, A M, Elmahdy, A E
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.01.2018
Subjects
average speckle contrast
fringe visibility
phase probability density distribution
roughness root mean square
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Summary:A new analytical expression for the average speckle contrast is derived for surfaces of random roughness at reflection. Rayleigh and Simpson phase probability density distributions of non-zero phase mean value are assumed for the roughness of the surface. The behavior of a speckle contrast with a roughness root mean square of phase deviation is presented. The effect of the spectral light profile, its spectral width, the density of the scatterers of the rough surface and the average time delay between the interfering beams are taken into consideration.
Bibliography:JOPT-104294.R2
ISSN:2040-8978
2040-8986
DOI:10.1088/2040-8986/aa9a1d