Practical Optics bridges the gap between what students learn in optical engineering curricula and the problems they realistically will face as optical engineering practitioners, in a variety of high-tech industries. A broad range of topics from modern optical engineering are addressed, ranging from geometrical optics and basic layout of electro-optical instruments, to the 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.).