Encyclopaedia of Optical Science, Technology and Engineering affect almost every aspect of our lives. Millions of miles of optical fiber carry voice and data signals around the world. Lasers are used in eye, kidney, and heart surgery. Industry uses optical methods in everything from the production of computer chips to the construction of tunnels. Harnessing Light surveys this multitude of applications, as well as the status of the optics industry and of research and education in optics, and identifies actions that could enhance the field's contributions to society and facilitate its continued technical development. This Encyclopaedia covers essential concepts of comprehension and reports the great progress of current knowledge in optics. The method of presentation is inspired by experienced professor, with an emphasis on "telling" optics, rather than deducing it from fundamental laws. The concepts are formulated in a way such that the necessary mathematical tools do not hinder comprehension of the phenomena. Global in vision, the book can also be used as a reference. In addition to the traditional aspects of optics, it includes the tools and methods currently used by researchers and engineers as well as explanation and implications of the most recent developments.