Preface to the Second Edition

R. Barry Johnson, Huntsville, Alabama

Inasmuch as the first edition of this book could be regarded as an extension and modernization of Professor Alexander Eugen Conrady's Applied Optics and Optical Design, this second edition can be viewed as a further extension and modernization of Conrady's 80-year-old treatise.1 As was stated in the preface to the first edition, referring to Conrady's book, “This was the first practical text to be written in English for serious students of lens design, and it received a worldwide welcome.” Until then, optical design was generally in a disorganized state and design procedures were often considered rather mysterious by many.

In 1917, the Department of Technical Optics at the Imperial ...

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