A Binary Shaped Mask Coronagraph for a Segmented Pupil

Abstract

We present the concept of a binary shaped mask coronagraph applicable to a telescope pupil including obscuration, based on previous works on binary shaped pupil mask by \citet{Kasdin2005} and \citet{Vanderbei1999}. Solutions with multi-barcode masks which "skip over" the obscuration are shown for various types of pupil of telescope, such as SUBARU, JWST, SPICA, and other examples. The number of diffraction tails in the point spread function of the coronagraphic image is reduced to two, thus offering a large discovery angle. The concept of mask rotation is also presented, which allows post-processing removal of diffraction tails and provides a 360${}^{\circ }$ continuous discovery angle. It is suggested that the presented concept offers solutions which potentially allow large telescopes with segmented pupil in future to be used as platforms for an coronagraph.

12 pages, 4 figures

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• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• A giant planet imaged in the disk of the young star Beta Pictoris
• Optical Images of an Exosolar Planet 25 Light Years from Earth
• Theoretical Limits on Extrasolar Terrestrial Planet Detection with Coronagraphs
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Cited by in corpus (6)

• The SPICA coronagraphic instrument (SCI) for the study of exoplanets
• Experimental demonstration of binary shaped pupil mask coronagraphs for telescopes with obscured pupils
• Imaging exoplanets with coronagraphic instruments
• Comparative study of manufacturing techniques for coronagraphic binary pupil masks: masks on substrates and free-standing masks
• A Possible Converter to Denoise the Images of Exoplanet Candidates through Machine Learning Techniques
• Coronagraphic demonstration experiment using aluminum mirrors for space infrared astronomical observations