Optical architectures for augmented virtual and mixed reality headsets This book is a timely review of the various optical architectures display technologies and building blocks for modern consumer enterprise and defense head mounted displays for various applications including smart glasses smart eyewear and virtual reality augmented reality and mixed reality headsets. Special attention is paid to the facets of the human perception system and the need for a human centric optical design process that allows for the most comfortable headset that does not compromise the users experience. Major challenges from wearability and visual comfort to sensory and display immersion must be overcome to meet market analyst expectations and the book reviews the most appropriate optical technologies to address such challenges as well as the latest product implementations