Phase and Lyot-type coronagraphs for the High Order Testbench: prototyping and first laboratory results

Patrice Martinez; Elise Vernet; Christophe Dorrer; Emmanuel Aller Carpentier; Anthony Boccaletti; Markus Kasper; Jacques Baudrand; Christine Chaumont

doi:10.1117/12.788156

15 July 2008 Phase and Lyot-type coronagraphs for the High Order Testbench: prototyping and first laboratory results

Patrice Martinez, Elise Vernet, Christophe Dorrer, Emmanuel Aller Carpentier, Anthony Boccaletti, Markus Kasper, Jacques Baudrand, Christine Chaumont

Author Affiliations +

Proceedings Volume 7015, Adaptive Optics Systems; 70156B (2008) https://doi.org/10.1117/12.788156
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

Citation Download Citation

Patrice Martinez, Elise Vernet, Christophe Dorrer, Emmanuel Aller Carpentier, Anthony Boccaletti, Markus Kasper, Jacques Baudrand, and Christine Chaumont "Phase and Lyot-type coronagraphs for the High Order Testbench: prototyping and first laboratory results", Proc. SPIE 7015, Adaptive Optics Systems, 70156B (15 July 2008); https://doi.org/10.1117/12.788156

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