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

Shawn P. Callahan; Brian Cuerden; Daniel G. Fabricant; B. Martin

doi:10.1117/12.549960

29 September 2004 The MMT f/5 secondary support system: design, implementation, and performance

Shawn P. Callahan, Brian Cuerden, Daniel G. Fabricant, B. Martin

Proceedings Volume 5495, Astronomical Structures and Mechanisms Technology; (2004) https://doi.org/10.1117/12.549960
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

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.

Citation Download Citation

Shawn P. Callahan, Brian Cuerden, Daniel G. Fabricant, and B. Martin "The MMT f/5 secondary support system: design, implementation, and performance", Proc. SPIE 5495, Astronomical Structures and Mechanisms Technology, (29 September 2004); https://doi.org/10.1117/12.549960

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