The Pupil-swapping Coronagraph

Details The Pupil-swapping Coronagraph The Pupil-swapping Coronagraph

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pasp..118..860g&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 118, Issue 844, pp. 860-865.

Physics

Optics

4

Instrumentation: Adaptive Optics, Techniques: Interferometric, Instrumentation: High Angular Resolution, Stars: Planetary Systems

Scientific paper

A new coronagraph that performs destructive interference between copies of the telescope pupil in which ``slices'' have been swapped is studied in this paper. A fourth-order ``pupil-swapping coronagraph'' is particularly attractive for direct imaging of extrasolar terrestrial planets: it achieves 100% throughput at 1.4λ/d on a square pupil (72.5% at 1.77λ/d on a circular pupil), is compatible with a central obstruction and spiders, and delivers sharp images of off-axis sources. Direct detection of extrasolar terrestrial planets appears theoretically feasible on a 2 to 3 m visible-wavelength telescope in space.

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