Author(s)

Mohamed Mansour El-Nicklawy¹, Amin Fahim Hassan¹, Adel Ebrahim Elmahdy^1*, Afaf Mahmoud Abd-Rabou¹, Ezzulddin Abdoulsahib Eesee^1,2

¹Department of Physics, Faculty of Science, Helwan University, Cairo, Egypt.
²Department of Science, Open Educational College, Baghdad, Iraq.

Under conditions differing from those subjected for central limit theorem, the spatial autocorrelation function of speckle pattern resulting from illuminated rough surface is investigated. Its dependence on different illuminating apertures and the average of the roughness heights is presented theoretically and experimentally. The experiments were carried out using a set of circular and square apertures having different sizes. The results indicate that, increasing the size of the illuminating aperture leads to a decrease in the width of the main lobe of the spatial autocorrelation function.

Speckle Pattern, Autocorrelation Function, Rough Surface

El-Nicklawy, M. , Hassan, A. , Elmahdy, A. , Abd-Rabou, A. and Eesee, E. (2019) Effect of the Illuminating Point Spread Function and Roughness on the Speckle Correlation Field. Optics and Photonics Journal, 9, 165-177. doi: 10.4236/opj.2019.911015.