MMT adaptive secondary mirror prototype performance

Donald G. Bruns; Todd K. Barrett; David G. Sandler; Guido Brusa-Zappellini; Hubert M. Martin; James Roger P. Angel

doi:10.1117/12.268969

21 March 1997 MMT adaptive secondary mirror prototype performance

Donald G. Bruns, Todd K. Barrett, David G. Sandler, Guido Brusa-Zappellini, Hubert M. Martin, James Roger P. Angel

Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.268969
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

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.

Citation Download Citation

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); https://doi.org/10.1117/12.268969

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