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Characterization of deformable mirrors for the MagAO-X project
Author(s): Kyle Van Gorkom; Kelsey L. Miller; Jared R. Males; Olivier Guyon; Alexander T. Rodack; Jennifer Lumbres; Justin M. Knight
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Paper Abstract

The MagAO-X instrument is an upgrade of the Magellan AO system that will introduce extreme adaptive optics capabilities for high-contrast imaging at visible and near-infrared wavelengths. A central component of this system is a 2040-actuator microelectromechanical (MEMS) deformable mirror (DM) from Boston Micromachines Corp. (BMC) that will operate at 3.63 kHz for high-order wavefront control. Two additional DMs from ALPAO will perform low-order and non-common-path science-arm wavefront correction. The accuracy of the wavefront correction is limited by our ability to command these DMs to a desired shape, which requires a careful characterization of each DM surface. We have developed a characterization pipeline that uses a Zygo Verifire Interferometer to measure the surface response and a Karhunen-Loeve transform to remove noise from our measurements. We present our progress in the characterization process and the results of our pipeline applied to an ALPAO DM97 and a BMC Kilo-DM, demonstrating the ability to drive the DMs to a flat of ≤2nm and ≤4nm RMS in our beam footprint on the University of Arizona Wavefront Control (UAWFC) testbed.

Paper Details

Date Published: 12 July 2018
PDF: 7 pages
Proc. SPIE 10703, Adaptive Optics Systems VI, 107035A (12 July 2018); doi: 10.1117/12.2323450
Show Author Affiliations
Kyle Van Gorkom, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)
Kelsey L. Miller, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)
Jared R. Males, Steward Observatory, The Univ. of Arizona (United States)
Olivier Guyon, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)
Subaru Telescope, National Astronomical Observatory of Japan (United States)
Alexander T. Rodack, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)
Jennifer Lumbres, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)
Justin M. Knight, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 10703:
Adaptive Optics Systems VI
Laird M. Close; Laura Schreiber; Dirk Schmidt, Editor(s)

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