This book elucidates new techniques and their applications of optical engineering in a multidisciplinary approach. It provides comprehensive insights into this field. Optical engineering refers to the study of optics and designing of optical instruments like microscopes, telescopes, optic discs, lasers, and fiber optic communication systems, etc. This text is a compilation of chapters that discuss the most vital concepts in the field of optical engineering. It presents this complex subject in the most comprehensible and easy to understand language. Also included in it is a detailed explanation of the various concepts and applications of optical engineering. This textbook is a complete source of knowledge on the present status of this important field and it is meant for students who are looking for an elaborate text on modern optical engineering.