Contrast Of Speckle Patterns Produced By Gamma-Distributed Diffusers

Eugenio R. Mendez; Hector M. Escamilla

doi:10.1117/12.948545

2 December 1988 Contrast Of Speckle Patterns Produced By Gamma-Distributed Diffusers

Eugenio R. Mendez, Hector M. Escamilla

Proceedings Volume 0976, Statistical Optics; (1988) https://doi.org/10.1117/12.948545
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

We study the speckle contrast produced by gamma-distributed diffusers in the far field as a function of the point of observation, the number of uncorrelated areas illuminated, and the statistics of the diffuser. It is found that the speckle contrast and the strength of the specular component are extremely sensitive to the detailed form of the probability density function of the phase variations introduced by the diffuser. This makes it difficult to infere roughness related parameters from measurements of these quantities.

Citation Download Citation

Eugenio R. Mendez and Hector M. Escamilla "Contrast Of Speckle Patterns Produced By Gamma-Distributed Diffusers", Proc. SPIE 0976, Statistical Optics, (2 December 1988); https://doi.org/10.1117/12.948545

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