Characterization of deformable mirrors for the MagAO-X project

Kyle Van Gorkom; Kelsey L. Miller; Jared R. Males; Olivier Guyon; Alexander T. Rodack; Jennifer Lumbres; Justin M. Knight

doi:10.1117/12.2323450

12 July 2018 Characterization of deformable mirrors for the MagAO-X project

Kyle Van Gorkom, Kelsey L. Miller, Jared R. Males, Olivier Guyon, Alexander T. Rodack, Jennifer Lumbres, Justin M. Knight

Author Affiliations +

Proceedings Volume 10703, Adaptive Optics Systems VI; 107035A (2018) https://doi.org/10.1117/12.2323450
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

Citation Download Citation

Kyle Van Gorkom, Kelsey L. Miller, Jared R. Males, Olivier Guyon, Alexander T. Rodack, Jennifer Lumbres, and Justin M. Knight "Characterization of deformable mirrors for the MagAO-X project", Proc. SPIE 10703, Adaptive Optics Systems VI, 107035A (12 July 2018); https://doi.org/10.1117/12.2323450

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