This book grew out of the author's need for a concise, comprehensive text that would give his students a deep understanding of optics and optical processes without overwhelming them in mathematics. It provides material for a one-semester, advanced undergraduate or graduate level course on electro-optical systems and is a useful reference in related courses such as optical system design, optical physics, holography, Fourier optics and optical metrology. The text emphasizes physical insight aimed at engineering applications. Problems and solutions are included. The final chapter presents applications for signal processing at a more advanced level aimed at students working in the field.