Unusual Telescopes

Front Cover
Cambridge University Press, Apr 27, 1995 - Nature - 240 pages
In this book, Peter Manly surveys more than 150 unusual telescope designs. These are telescopes built by amateur and professional astronomers to suit some special need. There is, for instance, an inflatable telescope and one with a liquid mirror. Every so often a neglected design comes back into fashion: the largest telescopes now under construction use the alt-azimuth design that was ignored for over a century, and liquid mirror telescopes can be used for zenithal astronomy. The author shows why a particular engineering approach makes each telescope unique and explains the rationale behind the design. The effects on telescope performance are discussed where possible. This is not just a collection of weird and wonderful devices that proved to be false starts; the author also discusses the first instrument to measure star diameters and the first useful radio telescope. This book is a resource and stimulus for anyone who likes to build astronomical telescopes or is interested in the history of telescope-making.
 

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Contents

List of Illustrations
7
Glassmetal mirrors
8
Classification by number of optical elements
21
Wide field optics
44
Eliminating diffraction spikes
69
Twoaxis telescopes
79
Threeaxis telescopes
86
Floating telescopes
93
Miscellaneous drives
125
Truckmounted and vehiclemounted telescopes
138
Riding the telescope
144
Springfield mounts
155
Coudé mounts 16 1
161
Telescopes built into houses
173
Limits
180
Whimsy
208

Mount materials
100
Strange drivers
110
Manual drives
119

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