This book on practical optical engineering addresses the needs of engineers and scientists who did not specialize in the field but who need to quickly familiarize themselves with it for their projects. The text briefly introduces the most basic optics before describing various optical components, optical devices and systems, lasers, laser optics and devices, optic fibers, opto-electrical devices, optical designs, and optical assemblies. The performance specifications of some optical components representing today's technologies are also provided. Rather than present manual numerical calculations and raytracings (which are complex, time consuming and often inaccurate), the book describes how to use computers and optical software to perform these tasks.