The pupil-swapping coronagraph

O. Guyon, M. Shao

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)860-865
Number of pages6
JournalPublications of the Astronomical Society of the Pacific
Issue number844
StatePublished - Jun 2006

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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