Linnemann's classic work on non-spherical lenses is an important text for anyone interested in optics and lens design. In this book, Linnemann explains the theory behind non-spherical lenses, and provides detailed examples of how to design different types of non-spherical lenses for different applications. This book is essential reading for anyone who wants to design high-quality lenses for cameras, microscopes, telescopes, or other optical instruments.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.