A discussion of electro-optics, this volume is mostly about E-O sensors - those electronic transducers that convert light waves into a proportional voltage, current or resistance. The coverage of the sensors is wide enough to allow the reader to understand the physics behind the theory of operation of the device, and also the circuits used to make these sensors into useful devices. The book is designed to teach the physics and operation of E-O devices, then proceed to circuits and methods for actual application of the devices in real situations.