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The Four Quadrant-ZOG and Annular Groove Phase Mask Coronagraphs

Mawet, Dimitri and Riaud, Pierre and Absil, Olivier and Baudrand, Jacques and Surdej, Jean (2005) The Four Quadrant-ZOG and Annular Groove Phase Mask Coronagraphs. In: Techniques and Instrumentation for Detection of Exoplanets II. Proceedings of SPIE. No.5905. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 59051N . ISBN 9780819459107.

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Phase mask coronagraphy is a technique aiming at accommodating both high dynamic and high angular resolution imaging of faint sources around bright objects such as exo-planets orbiting their parent stars or host galaxies around Active Galactic Nuclei. We present two new phase mask coronagraphs implemented with subwavelength diffractive optical elements consisting of optimized surface-relief gratings. The first one is an evolution of the Four Quadrant Phase Mask coronagraph, which resolves the π phase shift chromaticity problem: the Four Quadrant Zeroth Order Grating (4QZOG). The second one is a totally new design consisting of an optical vortex induced by a space-variant grating: the Annular Groove Phase Mask (AGPM) coronagraph is fully symmetric and free from any "shaded zones". Some manufacturing hints are given.

Item Type:Book Section
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URLURL TypeDescription DOIArticle
Mawet, Dimitri0000-0002-8895-4735
Absil, Olivier0000-0002-4006-6237
Surdej, Jean0000-0002-7005-1976
Additional Information:© 2005 Society of Photo-Optical Instrumentation Engineers (SPIE). October 05, 2005. D. Mawet acknowledges the financial support of the Belgian “Fonds pour la formation à la Recherche dans l’Industrie et dans l’Agriculture”. P. Riaud and J. Surdej acknowledges the financial support of the “Pôle d’Attraction Inter-Universitaire”.
Funding AgencyGrant Number
Fonds pour la Formation à la Recherche dans l’índustrie et dans l’Ágriculture (FRIA-Belgium)UNSPECIFIED
Pôle d’Attraction Inter-UniversitaireUNSPECIFIED
Subject Keywords:Phase mask coronagraphy, achromatic phase shifters, subwavelength gratings, space-variant gratings, optical vortices
Series Name:Proceedings of SPIE
Issue or Number:5905
Record Number:CaltechAUTHORS:20150527-145843389
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Official Citation:Dimitri Mawet ; Pierre Riaud ; Olivier Absil ; Jacques Baudrand and Jean Surdej "The four quadrant-ZOG and annular groove phase mask coronagraphs", Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 59051N (October 05, 2005); doi:10.1117/12.640363
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57872
Deposited On:27 May 2015 23:25
Last Modified:10 Nov 2021 21:56

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