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Proceedings Paper

MMT adaptive secondary mirror prototype performance
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Paper Abstract

The new 6.5 m single mirror multiple mirror telescope (MMT) will be equipped with adaptive optics capabilities to enhance high resolution infrared astronomy. Before we build the 64 cm diameter adaptive secondary, we fabricated a smaller prototype mirror. The adaptive secondary uses voice coil force actuators with an average spacing of 30 mm. Surrounding each actuator is an analog capacitor position sensor operating in a digital closed loop at 10 kHz. This allows the force actuators to be controlled as if they were position actuators. The adaptive secondary configuration and performance test results are presented, followed by the changes to be incorporated into the next curved shell prototype.

Paper Details

Date Published: 21 March 1997
PDF: 7 pages
Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); doi: 10.1117/12.268969
Show Author Affiliations
Donald G. Bruns, ThermoTrex Corp. (United States)
Todd K. Barrett, ThermoTrex Corp. (United States)
David G. Sandler, ThermoTrex Corp. (United States)
Guido Brusa-Zappellini, Steward Observatory/Univ. of Arizona (United States)
Hubert M. Martin, Steward Observatory/Univ. of Arizona (United States)
James Roger P. Angel, Steward Observatory/Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 2871:
Optical Telescopes of Today and Tomorrow
Arne L. Ardeberg, Editor(s)

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