This book answers to most important question asked by detection system designers: How can an ultimately weak optical signal be detected? The author considers all the main types of photodetectors, from photodiodes to focal plane arrays, paying much attention to the different types of noise and ways of maximizing the signal-to-noise ratio.
Guidelines for calculating system parameters to achieve the highest possible signal-to-noise ratio, using the examples of laser range finder and IR imager, are offered. Most sections include numerical evaluations as well as simple approximations and diagrams. The book also incorporates the comments of volunteers who tested out the theories and assemblies presented in the early chapters.