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Proceedings Paper

Simulations of coronagraphy with a dynamic hologram for the direct detection of exo-planets
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Paper Abstract

In a previous paper,1 we discussed an original solution to improve the performances of coronagraphs by adding, in the optical scheme, an adaptive hologram removing most of the residual speckle starlight. In our simulations, the detection limit in the flux ratio between a host star and a very near planet (5λ/D) improves over a factor 1000 (resp. 10000) when equipped with a hologram for cases of wavefront bumpiness imperfections of λ/20 (resp. λ/100). We derive, in this paper, the transmission accuracy required on the hologram pixels to achieve such goals. We show that preliminary tests could be performed on the basis of existing technologies.

Paper Details

Date Published: 9 August 2010
PDF: 5 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77314X (9 August 2010); doi: 10.1117/12.861756
Show Author Affiliations
Davide Ricci, Univ. de Liège (Belgium)
Hervé Le Coroller, Observatoire de Haute-Provence (France)
Antoine Labeyrie, Collège de France (France)
Pierre Piron, Univ. de Liège (Belgium)

Published in SPIE Proceedings Vol. 7731:
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann Jr.; Mark C. Clampin; Howard A. MacEwen, Editor(s)

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