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21 March 1997 MMT adaptive secondary mirror prototype performance
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Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997)
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden
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.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Donald G. Bruns, Todd K. Barrett, David G. Sandler, Guido Brusa-Zappellini, Hubert M. Martin, and James Roger P. Angel "MMT adaptive secondary mirror prototype performance", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997);


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