Wavefront sensing using non-redundant aperture masking interferometry: Tests and validation on Subaru/SCExAO

V. Deo, S. Vievard, N. Cvetojevic, B. Norris, O. Guyon, J. Lozi, K. Ahn, E. Huby, S. Lacour, F. Martinache, N. Skaf, P. Tuthill

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

2 Scopus citations

Abstract

Recent evolutions in high contrast imaging have shed light on intrinsic limitations of general purpose adaptive optics (AO) systems. In particular, the low wind and petaling effects (LWE, PE), caused by the discontinuous apertures of telescopes, are poorly corrected, if at all, by commonly used wavefront sensors (WFSs). This results in large differential piston aberrations between the disjointed portions of the clear aperture. The LWE/PE decoheres the PSF core, generating multiple side lobes, and dramatically shuts off coronagraphic capabilities. We demonstrate the re-purposing of non-redundant sparse aperture masking (SAM) interferometers into low-order WFSs complementing the high-order pyramid WFS, on the SCExAO experimental platform at Subaru Telescope. The SAM far-field interferograms are used for direct retrieval of PE aberrations, which are invisible to the main AO loop. We show that this technique allows for a high-sensitivity, high-precision wavefront control loop, down to illuminations of a few hundreds of photons per frame.

Original languageEnglish (US)
Title of host publicationTechniques and Instrumentation for Detection of Exoplanets X
EditorsStuart B. Shaklan, Garreth J. Ruane
PublisherSPIE
ISBN (Electronic)9781510644847
DOIs
StatePublished - 2021
EventTechniques and Instrumentation for Detection of Exoplanets X 2021 - San Diego, United States
Duration: Aug 1 2021Aug 5 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11823
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceTechniques and Instrumentation for Detection of Exoplanets X 2021
Country/TerritoryUnited States
CitySan Diego
Period8/1/218/5/21

Keywords

  • Low wind effect
  • Nonredundant masking
  • Optical interferometry
  • Sensor fusion
  • Sparse aperture masking
  • Wavefront sensing and control

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Wavefront sensing using non-redundant aperture masking interferometry: Tests and validation on Subaru/SCExAO'. Together they form a unique fingerprint.

Cite this