Imaging planetary systems with Eddington using a coronagraphic four-quadrants phase-mask

Details Imaging planetary systems with Eddington using a coronagraphic four-quadrants phase-mask Imaging planetary systems with Eddington using a coronagraphic four-quadrants phase-mask

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.485..147r&link_type=abstract

In: Proceedings of the First Eddington Workshop on Stellar Structure and Habitable Planet Finding, 11 - 15 June 2001, Córdoba, S

Physics

Stars: Structure, Planets: Exoplanets

Scientific paper

We have recently described a concept of a coronagraph using a phase mask with 4 sectors (FQ-PM) which presents an excellent rejection factor, and which can be rather easily made achromatic with two dispersive materials or with a multi-layers reflective phase mask. We propose to add this device to the Eddington payload for direct imaging of planetary systems. The FQ-PM requires an off-axis telescope and a good correction of pointing errors to have a high rejection factor (>106. The achromatic mask and the possibility of fine correction of pointing error directly on the phase mask are presently under study.

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