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Proceedings Paper

Phase and Lyot-type coronagraphs for the High Order Testbench: prototyping and first laboratory results
Author(s): Patrice Martinez; Elise Vernet; Christophe Dorrer; Emmanuel Aller Carpentier; Anthony Boccaletti; Markus Kasper; Jacques Baudrand; Christine Chaumont
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Paper Abstract

We report laboratory development of coronagraphic devices to be implemented on the High Order Testbench (HOT) to assess intensity reduction between them at a high Strehl ratio regime. The high order test bench implements extreme adaptive optics with realistic telescope conditions reproduced by star and turbulence generators. A 32×32 actuator micro deformable mirror, one pyramid wave front sensor, one Shack-Hartmann wave front sensor and the ESO SPARTA real-time computer. This will enable characterization and comparative study of different types of coronagraphs in realistic conditions. We have developed several prototypes of promising coronagraphs concepts: Four Quadrants Phase Mask1 (FQPM), Lyot2 coronagraphs and Apodized Pupil Lyot Coronagraph3 (APLC). We will describe the design of the IR coronagraphic path on HOT, prototyping processes used for each coronagraph and discuss quality control and first results obtained on a IR coronagraphic testbench (Strehl ratio ~ 94%). Finally, we will present our experiment plan and future coronagraph developments.

Paper Details

Date Published: 15 July 2008
PDF: 10 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70156B (15 July 2008); doi: 10.1117/12.788156
Show Author Affiliations
Patrice Martinez, European Southern Observatory (Germany)
Observatoire de Paris (LESIA) (France)
Groupement d’Interet Scientifique PHASE (France)
Elise Vernet, European Southern Observatory (Germany)
Christophe Dorrer, Lab. for Laser Energetics-Univ. of Rochester (United States)
Emmanuel Aller Carpentier, European Southern Observatory (Germany)
Anthony Boccaletti, Observatoire de Paris (LESIA) (France)
Groupement d’Interet Scientifique PHASE (France)
Markus Kasper, European Southern Observatory (Germany)
Jacques Baudrand, Observatoire de Paris (LESIA) (France)
Groupement d’Interet Scientifique PHASE (France)
Christine Chaumont, Observatoire de Paris Meudon (GEPI) (France)
Groupement d’Interet Scientifique PHASE (France)

Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

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