MMT adaptive secondary mirror prototype performance

Details MMT adaptive secondary mirror prototype performance MMT adaptive secondary mirror prototype performance

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.2871..890b&link_type=abstract

Proc. SPIE Vol. 2871, p. 890-896, Optical Telescopes of Today and Tomorrow, Arne L. Ardeberg; Ed.

Physics

Optics

3

Scientific paper

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.

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