The OTF has appreciable potential for use in specifying, designing, and evaluating optical systems; this book, then responds to an obligation by discussing such associated topics as optical design, image quality, merit functions, and evaluation criteria - especially as they relate to ways that the OTF may be applied. This chapter and the next are devoted to discussions of these topics. Optical design, the topic of this chapter, is the process of finding the descriptions of individual elements and their arrangement in a desired optical system. The descriptions provide the information as specifications necessary to manufacture the system.
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