Reflective OpticsDietrich KorschHuntsville,AlabamaPACADEMIC PRESS,INC.Harcourt Brace Jovanovich,PublishersBoston San Diego New YorkLondon Sydney Tokyo TorontoThis book is printed on acid free paper.Copyright C1991 by Academic Press,Inc.All rights reserved.No part of this publication may be reproduced ortransmitted in any form or by any means,electronicor mechanical,including photocopy,recording,orany information storage and retrieval system,withoutpermission in writing from the publisher.ACADEMIC PRESS,INC.1250 Sixth Avenue,San Diego,CA 92101United Kingdom Edition published byACADEMIC PRESS LIMITED24-28 Oval Road,London NW1 7DXLibrary of Congress Cataloging-in-Publication DataKorsch,Dietrich.Reflective optics/Dietrich Korsch.p.cm.Includes bibliographical references and index.ISBN 0-12-421170-4 (acid-free paper)1.Reflection(Physics)-Mathematics.2.Imaging systems-Mathematics.3.Mirrors-Design and construction-Mathematics.4.Fermat's theorem.I.Title.QC383.K671991535'.323dc2090-47164CIPPRINTED IN THE UNITED STATES OF AMERICA91929394987654321To my wife,Ursula,and my daughters,Katja and Jana,without whom this bookwould not have been completed