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1 results

  • Successes and challenges of the APP Coronagraph

  • Matthew A. Kenworthy, Sascha Quanz, Gilles Otten, Tiffany Meshkat, Johanan Codona, Frans Snik, Michael E. Meyer, Markus Kasper, Julien Girard
  • Journal:
    Proceedings of the International Astronomical Union / Volume 8 / Issue S299 / June 2013
    Published online by Cambridge University Press:
    06 January 2014, pp. 40-41
    Print publication:
    June 2013
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  • The Apodizing Phase Plate (APP) coronagraph has been used to image the exoplanet β Pictoris b and the protoplanet candidate around HD 100546, and is currently in use in surveys with NaCo at the VLT. Its success is due to its tolerance to tip-tilt pointing errors in current AO systems, which degrade the performance of nearly all other coronagraphs. Currently the sensitivity of the APP is limited by non-common path errors in the science camera systems and by its chromatic behaviour. We present the achromatized Vector APP coronagraph and address how we will measure and minimise non-common path errors with Focal Plane Wavefront Sensing algorithms.