When light from a CW laser shines on virtually any surface but a mirror, the light reflected or scattered from that surface exhibits a random, granular structure known as "speckle". This book provides a comprehensive discussion of the statistical properties of speckle, as well as detailed coverage of its role in applications. Some of the applications discussed include speckle in astronomy, speckle in the eye, speckle in projection displays, speckle in coherence tomography, speckle in lithography, speckle in waveguides (modal noise), speckle in optical radar detection, and speckle in metrology. The book is aimed at professionals and graduate students.