Practical Optics bridges the gap between what students learn in optical engineering curricula and the problems they will face as optical engineering practitioners, in a variety of high-tech industries. A broad range of topics from modern optical engineering are addressed, including geometrical optics and basic layout of electro-optical instruments, theory of imaging, radiation sources and radiation sensors, spectroscopy, and color vision, and description of optical methods for measurements of numerous physical parameters (temperature, flow velocity, distances, roughness of surfaces, etc.). This book is self-contained, very concise, and yet is the most comprehensive survey available on electro-optics and optical engineering. Readers will gain an understanding of how to solve realistic problems in a high-tech setting, while gaining a straightforward, yet rigorous overview of optical engineering.