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Proceedings Paper

The MMT f/5 secondary support system: design, implementation, and performance
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Paper Abstract

The 6.5m Multiple Mirror Telescope Observatory (MMTO) installed a new f/5 secondary system in April 2003. We describe the design and performance of the mirror cell and supports for the 1.7 m diameter Zerodur mirror. Pneumatic actuators divided into one lateral and three axial zones support this 318 kg mirror. The control feedback for the high bandwidth pressure transducers for these four zones is obtained from six load cells attached to rigid positioning rods. The mirror cell includes thermal control, force limiters, passive supports, installation and handling, and alignment metrology. Optical test results are described and compared to the original design specifications.

Paper Details

Date Published: 29 September 2004
PDF: 10 pages
Proc. SPIE 5495, Astronomical Structures and Mechanisms Technology, (29 September 2004); doi: 10.1117/12.549960
Show Author Affiliations
Shawn P. Callahan, MMT Observatory/Univ. of Arizona (United States)
Brian Cuerden, Steward Observatory/Univ. of Arizona (United States)
Daniel G. Fabricant, Harvard-Smithsonian Ctr. for Astrophysics (United States)
B. Martin, Steward Observatory/Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 5495:
Astronomical Structures and Mechanisms Technology
Joseph Antebi; Dietrich Lemke, Editor(s)

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