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Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.514..245l&link_type=abstract
In: Earth-like planets and moons. Proceedings of the 36th ESLAB Symposium, 3 - 8 June 2002, ESTEC, Noordwijk, The Netherlands. E
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Extraterrestrial Planets: Telescopes, Detection
Scientific paper
Hypertelescopes, or "multi-aperture densified-pupil imaging optical arrays" can provide direct images with full luminosity at arbitrary aperture dilution. They can be equipped with coronagraphic masks for difficult imaging situations such as the search for exo-Earths at infra-red and visible wavelengths. For detecting faint planets, down to 10-10 relative intensity, multi-stage coronagraphs now appear feasible, both for telescopes and hypertelescopes. A 37-element hypertelescope has been proposed to NASA for TPF. Because the high-resolution image separates the planet's peak from most of the zodiacal and exozodiacal background, sensitivity is gained with respect to planet detection schemes using a beam-splitter for nulling. For resolving continents, and other details such as the "green spots", of an exo-Earth at 3 parsecs, a second generation hypertelescope will require more than 100 apertures of 3 m, arrayed as a 100 km diluted aperture.
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