The Magellan Telescope Deformable Secondary Adaptive Optics System

Details The Magellan Telescope Deformable Secondary Adaptive Optics System The Magellan Telescope Deformable Secondary Adaptive Optics System

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21440918c&link_type=abstract

American Astronomical Society, AAS Meeting #214, #409.18; Bulletin of the American Astronomical Society, Vol. 41, p.674

Physics

Optics

Scientific paper

We present the adaptive optics system for the 6.5m Magellan Telescope. The Magellan telescope is a 6.5m Gregorian telescope located in southern Chile at Las Campanas Observatory. The Gregorian design allows for an adaptive secondary mirror that can be tested off-sky in a straight-forward manner. We have fabricated a 85 cm diameter aspheric adaptive secondary with our subcontractors and partners. This secondary has 585 actuators with 1 msec response times. The secondary will allow low emissivity AO science. We will achieve very high Strehls ( 98%) in the Mid-IR (8-26 microns) imaged with the BLINC/MIRAC4 Mid-IR camera. This will allow the first "super-resolution" Mid-IR studies of dusty southern objects. We will employ a high order (585 mode) pyramid wavefront sensor similar to that used in the Large Binocular Telescope AO systems. The relatively high actuator count for a 6.5m telescope will allow modest Strehls to be obtained in the visible. Our visible light AO CCD camera is fed by a beamsplitter piggy backed on the wavefront sensor system. We have addressed several difficult issues with 20 milliarcsec diffraction-limited imaging in the visible with our VisAO system. The Magellan AO system successfully passed PDR in December 2008 and should have first light in early 2011.

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