Effect of the Illuminating Point Spread Function and Roughness on the Speckle Correlation Field

• 作者: Adel Ebrahim Elmahdy Afaf Mahmoud Abd-Rabou Amin Fahim Hassan Ezzulddin Abdoulsahib Eesee Mohamed Mansour El-Nicklawy
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 数学
• 关键词: SPECKLE PATTERN AUTOCORRELATION Function ROUGH Surface
• 年，卷（期）: 2019,（11）
• 页码范围: 165-177
• 页数: 13页
• 分类号: O17

摘要

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.