Laser scanning for electronic printing

The use of laser scanning techniques for acquisition and printing of images is reviewed with primary emphasis on the printing application. Following an introduction to the basic configuration of laser scanners and to the terminology of this field, some of the principal characteristics of these scanners are summarized. A short overview is given of the key components of scanners, i.e., lasers, modulators, and light deflectors. The integration of these and other components into complete scanning systems is then described, including discussion of optical design issues and several examples of practical optical system design for polygon scanners. Holographic scanners and some of their design considerations are discussed. The electronic and mechanical techniques required for satisfactory scanner design and construction are described. Finally, the embodiment of various design approaches into practical scanners is illustrated by a survey of some existing printer products.