This resource provides a comprehensive overview of the theory, practical considerations, and applications of holography. The author has spent his career working on different aspects of this subject, and in this book, conveys the foundation for others to use holography and holographic concepts in a variety of important applications. Special emphasis is placed on the analysis of the imaging and diffraction efficiency properties of holographic optical elements that are finding increasing use in medical imaging, solar conversion systems, and augmented reality eyewear. A comprehensive overview of holographic materials is also given as this area is critical for implementing successful holographic designs. The important areas of digital and computer generated holography are also presented to give the reader an understanding of these topics.