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

[en] In a previous paper, 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 1 000 (resp. 10 000) 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.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Ricci, Davide ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)

Le Coroller, Hervé

Labeyrie, Antoine

Piron, Pierre ; Université de Liège - ULiège > Département de physique > Optique - Hololab

Language :

English

Title :

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

Publication date :

2010

Event name :

Astronomical Telescopes and Instrumentation 2010: Space Telescopes and Instrumentation 2010 (Optical, Infrared, and Millimeter Wave)

Event organizer :

SPIE

Event place :

San Diego, United States - California

Event date :

from 27-06-2010 to 02-07-2010

Audience :

International

Main work title :

Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave

Editor :

Oschmann, J, Clampin, M.

Publisher :

SPIE

Collection name :

Proceedings of the SPIE, volume 7731

Additional URL :

http://adsabs.harvard.edu/abs/2010SPIE.7731E.158R

Available on ORBi :

since 06 October 2010

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Bibliography

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