Mirror Reflecting Coats: Production and Cleaning
In Chap. 4 we considered criteria for the optical efficiency of telescopes. Following Dierickx, the effective diameter D eff of a telescope was defined by Eq. (4.33) as $$ {D_{eff}} = D{\left( {{\tau _t}{I_0}} \right)^{\frac{1}{2}}} $$ (6.1) where D is th
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I. Appenzeller, Heidelberg, Germany G. Bömer, Garehing, Germany M. Harwit, Washington, DC, USA R. Kippenhahn, Göttingen, Germany J. Lequeux, Paris, France P. A. Strittmatter, Tueson, AZ, USA V. Trimble, College Park, MD, and Irvine, CA, USA
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For legend see front matter page IV
R. N. Wilson
Reflecting Telescope Optics 11 Manufacture, Testing, Alignment, Modern Techniques With 240 Figures and 39 Tables
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Raymond N. Wilson Waaler Str. 29 85296 Rohrbach/llm GERMANY
Cover picture: The two 10 m Keck telescopes at the observatory on Mauna Kea, Hawaii. On the left Keck II, on the right Keck I. At the time of completion of the text of this book (December 1997), these were not only the largest unit telescopes in the world, but also the only very large telescopes using new technology which were aIready in operation. (Photograph courtesy of the W.M. Keck Observatory, through J. Nelson and A. Perala. The high-resolution copy used was kindly provided by Richard J. Wainscoat, who holds the copyright). Legend to frontispiece: The ESO VLT: Unit Telescope No. 2 (Kueyen), photographed in March 2000 by Hans-Hermann Heyer, ESO. Photo upperleft: A 3-colour composite photo ofthe Crab Nebula (Messier 1) laken with the VLT Unit Telescope No. 2 and the FORS-2 instrument on 10 November, 1999. Distance about 6000 light-years. Exposures 1-5 min with seeing (FWHM) 0.65-0.80 arcsec. Photo upper right: A 3-colour composite photo of the Spiral Galaxy NGC 2997 taken with the VLT Unit Telescope No. 1 (Antu) and the FORS-l instrument on 5 March, 1999. Distance about 55 million light-years. Exposures 3-5 min. With a best star image quality of 0.25 arcsec (FWHM) in the near-infrared band (the other bands gave 0.35 and 0.34 arcsec FWHM), this is probably still the highest-resolution photo ever laken with a large ground-based telescope. Formatting of the photos by Ed Janssen, ESO. All photos and information courtesy of ESO.
Library of Congress Cataioging-in-Publication Data applied for. Die Deutsche Bibliothek - Cip Einheitsaufnahme Wilson, Raymond N.: Reftecting telescope optics 1R.N. Wilson. - Berlin; Heidelberg; New York; Barcelona; Hong Kong; London; Milan; Paris; Singapore; Tokyo: Springer (Astronomy and astrophysics library) 2. Manufacture, testing, alignment, modern techniques: with 39 tables. - 1999 ISBN 3-540-60356-5
Corrected Second Printing 2001
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