Direct exoplanet imaging possibilities of the nulling stellar coronagraph

Olivier Guyon, Francois Roddier

Research output: Contribution to journalConference articlepeer-review

24 Scopus citations


The nulling stellar coronagraph, first proposed by Roddier and Roddier and later demonstrated in a laboratory experiment is a technique to produce wide-field coronagraphic images. It uses a small phase-shifting mask in the focal plane to remove the central star by destructive interference. When applied to a space-based interferometric array of telescopes, it can be a powerful tool to search for faint companions around nearby stars or image circumstellar disks. A program was written to simulate the performance of a nulling stellar coronagraph for single or multi aperture telescopes in space or on the ground. In this study, we explore some aspects of the use of such a technique. By running our simulation program on various sources, we find that a nulling stellar coronagraph applied on a space interferometer like Darwin or TPF can image Earth-type planets in less than an hour of exposure time.

Original languageEnglish (US)
Pages (from-to)377-387
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4006 (I)
StatePublished - 2000
EventInterferometry in Optical Astronomy - Munich, Ger
Duration: Mar 27 2000Mar 29 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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