Laser and IPL Technology in Dermatology and Aesthetic Medicine
In this innovative textbook, renowned experts from the United States, Europe, and Asia present the most up-to-date information in the field of cutaneous laser surgery and intense pulsed light (IPL) technology. Technical and biophysical aspects of lasers a
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Christian Raulin • Syrus Karsai (Editors)
Laser and IPL Technology in Dermatology and Aesthetic Medicine
Editors Prof. Dr. Christian Raulin Laserklinik Karlsruhe Kaiserstr. 104 76133 Karlsruhe Germany [email protected]
Dr. Syrus Karsai Laserklinik Karlsruhe Kaiserstr. 104 76133 Karlsruhe Germany [email protected]
ISBN 978-3-642-03437-4 e-ISBN 978-3-642-03438-1 DOI 10.1007/978-3-642-03438-1 Springer Heidelberg Dordrecht London New York Library of Congress Control Number: 2010937978 © Springer-Verlag Berlin Heidelberg 2011 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Product liability: The publishers cannot guarantee the accuracy of any information about dosage and application contained in this book. In every individual case the user must check such information by consulting the relevant literature. Cover design: eStudioCalamar, Figueres/Berlin Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)
Foreword I
At the publication of this volume, lasers are half a century old, or perhaps it is more accurate to write half a century young. The interplay between light and matter fascinated Albert Einstein, whose E = mc2 expresses the fact that all matter and all energy are equated by only one constant – the speed of light. He also figured out that the only “thing” different observers measure as being constant – is the speed of light. Apparently, we live in a universe not only bathed in light, but defined by it. Einstein’s work on quantum electromagnetism is less well-known, but anyone using a laser should appreciate that the device exists because of it. Fundamentally, creation of a photon is the time-inverse of its absorption. In an excited atom, it is possible for photons to stimulate the creation of more photons. Stimulated emission, the S.E. of L.A.S.E.R., is at the heart of every laser. Charles Townes and colleagues made the first device using stimulated emission to amplify (the “A” in L.A.S.E.R.) microwave photons, and in a few years this was done with light (the “L” in L.A.S.E.R.). Is an understanding of laser operation important to a physician using a laser? Yes! Extreme power, coherence, well-defined wavelength, ability to generate very brief pulses, and to focus tight
