Low-order aberration sensitivity of an optical vortex coronagraph
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Updated: Jul 19, 2026

Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
David M Palacios1, Sarah L Hunyadi
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA. David.M.Palacios@jpl.nasa.gov
Abstract:
We describe a high-contrast imaging technique capable of directly measuring light from a terrestrial planet by using a vortex mask of topological charge m = 5. We demonstrate that this technique is relatively insensitive to low-order aberrations and compare its performance to that of a band-limited Lyot coronagraph.
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