This book is based upon a research project concerned with technological change and its implications for qualifications and employment. Technologies of light; or photonics; is defined as any methods, processes or products which make use of the spectrum of light, and any systems whose function is to study, measure, transform or transmit by means of light. It comprises the following topics, dealt with in the book: lasers, fiber optics and their accessories, systems for the capture, processing, classification and exploitation of image data.