Experimental advances in phase mask coronagraphy

Mamadou N'Diaye; Kjetil Dohlen; Salvador Cuevas; Rémi Soummer; Celia Sánchez

doi:10.1117/12.857239

22 July 2010 Experimental advances in phase mask coronagraphy

Mamadou N'Diaye, Kjetil Dohlen, Salvador Cuevas, Rémi Soummer, Celia Sánchez

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77391Z (2010) https://doi.org/10.1117/12.857239
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

Stellar coronagraphy is a key technology for current and future instruments for exoplanet imaging and spectroscopy, both on the ground and in space. We pursue the research on coronagraphs based on circular phase masks and report in this paper on recent advances in terms of the trade between spectral bandwidth and achievable contrast. Circular phase masks combined with colored apodizations prove to be promising options in such coronagraphic systems to reach high contrast gains within the search area over a wide band of wavelengths.

Citation Download Citation

Mamadou N'Diaye, Kjetil Dohlen, Salvador Cuevas, Rémi Soummer, and Celia Sánchez "Experimental advances in phase mask coronagraphy", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77391Z (22 July 2010); https://doi.org/10.1117/12.857239

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