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 language||English (US)|
|Number of pages||6|
|Journal||Publications of the Astronomical Society of the Pacific|
|State||Published - Jun 2006|
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science