History of mirror casting, figuring, segmentation and active optics |
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Authors: | Lothar Noethe |
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Institution: | 1. European Southern Observatory, Karl-Schwarzschild-Str.2, 85748, Garching, Germany
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Abstract: | Since the invention of the telescope the mirrors in reflecting telescopes have evolved from small pieces of polished speculum to sophisticated, computer-controlled systems. This review describes the major problems with the casting, figuring and support of these mirrors, and how fundamental inventions like depositing a silver layer on glass or electronic devices like computers opened the path to new solutions for fabricating larger mirrors with improved performance. |
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