The 15-meter National New Technology Telescope (NNTT) - The two design concepts

Physics – Optics

Scientific paper

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Design Analysis, Reflecting Telescopes, Azimuth, Cassegrain Optics, Focusing, Infrared Spectroscopy, Mirrors, Segments

Scientific paper

An evaluation is made of the two design alternatives under consideration for the U.S. National New Technology Telescope (NNTT), one of which must be chosen in the near future. The NNTT configurational alternatives have been designated the Multiple Mirror Telescope (MMT) and Segmented Mirror Telescope (SMT). The MMT strives to use building blocks whose scale and technology do not depart radically from those of existing telescopes, with four 7.5-m diameter telescopes being integrated in a fashion similar to that of the Kitt Peak six-mirror MMT. The SMT attempts to drastically reduce size, weight, and cost, while maintaining the advantages of the classical reflector telescope configuration. A 10-m version of the SMT has been under development at the University of California.

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