Speckle Imaging Using Aperture Modulation

The author, originally from Egypt, earned an honors degree from Ain Shams University, Fac. Sci., in June 1973. Subsequently, he achieved an M.Sc. degree in Laser Optics in December 1976. Demonstrating academic prowess, the author secured a scholarship in France in 1978, ultimately attaining the distinguished title of Doctor of Science in July 1985.

Since 2011 he has been an Emeritus Professor at Ain Shams University, with a total of 86 publications to his credit, 62 of which are indexed by Scopus. The author has authored seven published books. Notably, his most recent work, "Modulated Apertures and Resolution in Microscopy," was published in the series Springer Briefs in Applied Sciences and Technology on November 15, 2023.

This book covers speckle image formation using a variety of modulated apertures. The central theme revolves around theoretical analyses, specifically the calculation of impulse responses or Point Spread Functions (PSFs) corresponding to these apertures. These calculations provide crucial insights into the resolution inherent in the resulting speckle images. The book begins with an examination of the recognition of the direction of new apertures from elongated speckle images, setting the stage for subsequent discussions. The theoretical analyses extend to diverse aperture designs, including Gaussian, graded-index, and modulated apertures. The book delves into the nuanced dynamics of contrast in speckle images, exploring the Voigt distribution and the effects of modulation on contrast.

In addition to aperture-centric discussions, the book addresses the processing of the formed speckle images. The chapters impart a comprehensive understanding of speckle imaging, encompassing discrimination in microscopy using digital speckle images, the utilization of concentric hexagonal pupils, and the exploration of irregular apertures. The book culminates in a detailed exploration of speckle imaging in the context of an annular Hermite Gaussian laser beam.

Overall, this book serves as a valuable resource for researchers and academics seeking a profound exploration of speckle image formation, modulation, and processing across a spectrum of apertures and theoretical frameworks.

1   Recognition of the direction of new apertures from the elongated speckle images.- 2  Speckle images using Gaussian and graded-index apertures.- 3 The contrast of speckle images using Voigt distribution.- 4 Contrast of speckle images using modulated apertures.- 5  Speckle images modulated by a new Hamming-linear aperture.- 6 Discrimination between microscopic images using digital speckle images.- 7 Speckle images using concentric black and white hexagonal pupils.- 8  Irregular apertures.- 9  Speckle Imaging of annular Hermite Gaussian laser beam.