Comptes Rendus
no. 3-4
Band-limited masks for TPF coronagraph
[Masques à spectre limité pour le coronographe de TPF]
Kunjithapatham Balasubramanian1  ; Erkin Sidick1 ; Daniel W. Wilson1 ; Daniel J. Hoppe1 ; Stuart B. Shaklan1 ; John T. Trauger1
1 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Comptes Rendus. Physique, Volume 8 (2007) no. 3-4, pp. 288-297.

Les masques à bande limitée associés à des Lyot stops convenables peuvent supprimer efficacement la lumière de l'étoile pour permettre l'observation de l'exoplanète et son analyse. Dans cet article, nous présentons une revue de différents types de masques, leur conception, leur réalisation et leurs tests. Nous donnons les caractéristiques mesurées et les performances des masques testés en laboratoire et par simulation numérique. Une suppression de la lumière meilleure que 10−9 dans la région de 4 à 10 λ/D a été démontrée avec de tels masques dans notre banc d'essai de laboratoire.

Band-limited image plane masks, in conjunction with appropriate Lyot stops, function effectively to suppress host star light while transmitting planet light to the final image for detecting and characterizing faint exo-solar terrestrial planets. In this article, we review various types of image plane masks, their design, fabrication, and characterization. Measured characteristics and performance of sample masks in simulations and in laboratory experiments are also discussed. Star light suppression contrast better than 10−9 in the 4 to 10 λ/D region has been demonstrated with such a mask in our laboratory testbed.

Publié le :
DOI : 10.1016/j.crhy.2007.03.001
Keywords: TPF coronagraph, Occulting mask, Band-limited mask, HCIT
Mot clés : Coronographe TPF, Masques occulteurs, Masque à bande limité, Banc ITHD
Kunjithapatham Balasubramanian 1 ; Erkin Sidick 1 ; Daniel W. Wilson 1 ; Daniel J. Hoppe 1 ; Stuart B. Shaklan 1 ; John T. Trauger 1

1 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA 
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     title = {Band-limited masks for {TPF} coronagraph},
     journal = {Comptes Rendus. Physique},
     pages = {288--297},
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Kunjithapatham Balasubramanian; Erkin Sidick; Daniel W. Wilson; Daniel J. Hoppe; Stuart B. Shaklan; John T. Trauger. Band-limited masks for TPF coronagraph. Comptes Rendus. Physique, Volume 8 (2007) no. 3-4, pp. 288-297. doi : 10.1016/j.crhy.2007.03.001. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2007.03.001/

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[2] J.W. Goodman Introduction to Fourier Optics, McGraw–Hill, San Francisco, 1968

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[7] M.J. Kuchner A unified view of coronagraph image masks | arXiv

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[9] J.T. Trauger et al. Coronagraph contrast demonstrations with the High Contrast Imaging Testbed (J. Mather, ed.), Optical, Infrared, and Millimeter Space Telescopes, Proceedings of SPIE, vol. 5487, 2004, pp. 1330-1336

[10] M.J. Kuchner; D.N. Spergel Notch filter masks: Practical image masks for planet finding coronagraphs, The Astrophysical Journal, Volume 594 (2003), pp. 617-626

[11] Canyon Materials, Inc., San Diego, CA http://canyonmaterials.com

[12] J. Crepp et al. Laboratory testing of a Lyot coronagraph equipped with an eighth-order notch filter image mask, The Astrophysical Journal, Volume 646 (2006), pp. 1252-1259

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[15] J.T. Trauger; W.A. Traub A laboratory demonstration of the capability to image an Earth-like extrasolar planet, Nature, Volume 446 (2007), pp. 771-773

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