PSF calibration using the Lyot-based low order wavefront sensor telemetry: First simulations

Garima Singh, Julien Lozi, Elodie Choquet, Eugene Serabyn, Olivier Guyon

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

2 Scopus citations


One of the factors that drives the performance of small inner working angle (IWA) coronagraphs is the quality of the low-order wavefront calibration and control. The uncorrected residuals scatter the starlight and produce intensity fluctuations, which as a result creates dynamic speckle noise in the focal plane. To improve post processing of the science images, the low-order telemetry of the residuals left uncorrected by the control loop can be used to calibrate the amount of starlight leakage at small angular separations. In this proceeding, we present the preliminary simulations of point spread function calibration using the Lyot-based low-order wavefront sensor measurements (tip-Tilt errors only) for a vector vortex coronagraph.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems V
EditorsEnrico Marchetti, Jean-Pierre Veran, Laird M. Close
ISBN (Electronic)9781510601970
StatePublished - 2016
EventAdaptive Optics Systems V - Edinburgh, United Kingdom
Duration: Jun 26 2016Jul 1 2016

Publication series

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


OtherAdaptive Optics Systems V
Country/TerritoryUnited Kingdom


  • Coronagraphy
  • Extreme adaptive optics systems
  • High contrast imaging of Exoplanets
  • Low-order wavefront aberrations
  • Post-processing

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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