Focal plane wavefront sensing and control strategies for high-contrast imaging on the MagAO-X instrument

Kelsey Miller, Jared R. Males, Olivier Guyon, Laird M. Close, David Doelman, Frans Snik, Emiel Por, Michael J. Wilby, Chris Bohlman, Jennifer Lumbres, Kyle Van Gorkom, Maggie Kautz, Alexander Rodack, Justin Knight, Nemanja Jovanovic, Katie Morzinski, Lauren Schatz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


The Magellan extreme adaptive optics (MagAO-X) instrument is a new extreme adaptive optics (ExAO) system designed for operation in the visible to near-IR which will deliver high contrast-imaging capabilities. The main AO system will be driven by a pyramid wavefront sensor (PyWFS); however, to mitigate the impact of quasi-static and non-common path (NCP) aberrations, focal plane wavefront sensing (FPWFS) in the form of low-order wavefront sensing (LOWFS) and spatial linear dark field control (LDFC) will be employed behind a vector apodizing phase plate (vAPP) coronagraph using rejected starlight at an intermediate focal plane. These techniques will allow for continuous high-contrast imaging performance at the raw contrast level delivered by the vAPP coronagraph (6 x 10-5). We present simulation results for LOWFS and spatial LDFC with a vAPP coronagraph, as well as laboratory results for both algorithms implemented with a vAPP coronagraph at the University of Arizona Extreme Wavefront Control Lab.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems VI
EditorsDirk Schmidt, Laura Schreiber, Laird M. Close
ISBN (Print)9781510619593
StatePublished - 2018
EventAdaptive Optics Systems VI 2018 - Austin, United States
Duration: Jun 10 2018Jun 15 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherAdaptive Optics Systems VI 2018
Country/TerritoryUnited States


  • MagAO-X
  • direct exoplanet imaging
  • high-contrast imaging
  • low-order wavefront sensing (LOWFS)
  • modal wavefront sensing (MWFS)
  • spatial linear dark field control (LDFC)
  • vector apodizing phase plate (vAPP)
  • wavefront control

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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