Introduction and Brief History of Holography
The 1960s also saw a great deal of other work that had a significant impact on the field of holography. A true breakthrough in holography came from Emmett N. Leith and Juris Upatnieks who were working on high-resolution radar imaging at the University of Michigan’s Willow Run Lab during the early 1960s. A hologram is formed in a photosensitive material much like that used for a conventional photograph. However, a photograph only records the intensity of a scene while a hologram records both the intensity and phase of an object wave coming from an object. The analysis of hologram diffraction efficiency is considered from several perspectives including the Fourier analysis of thin gratings, and rigorous coupled wave analysis. However, an effort is made to provide an overview of the important areas of holography such as digital and computer-generated hologram as well as holographic interferometry. The chapter also presents an overview of the key concepts discussed in this book.