Share Email Print
cover

Proceedings Paper

FFREE: a Fresnel-FRee Experiment for EPICS, the EELT planets imager
Author(s): Jacopo Antichi; Christophe Vérinaud; Olivier Preis; Alain Delboulbé; Gérard Zins; Patrick Rabou; Jean-Luc Beuzit; Sarah Dandy; Jean-François Sauvage; Thierry Fusco; Emmanuel Aller-Carpentier; Markus Kasper; Norbert Hubin
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The purpose of FFREE - the new optical bench devoted to experiments on high-contrast imaging at LAOG - consists in the validation of algorithms based on off-line calibration techniques and adaptive optics (AO) respectively for the wavefront measurement and its compensation. The aim is the rejection of the static speckles pattern arising in a focal plane after a diffraction suppression system (based on apodization or coronagraphy) by wavefront pre-compensation. To this aim, FFREE has been optimized to minimize Fresnel propagation over a large near infrared (NIR) bandwidth in a way allowing efficient rejection up to the AO control radius, it stands then as a demonstrator for the future implementation of the optics that will be common to the scientific instrumentation installed on EPICS.

Paper Details

Date Published: 27 July 2010
PDF: 12 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773639 (27 July 2010); doi: 10.1117/12.857065
Show Author Affiliations
Jacopo Antichi, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Christophe Vérinaud, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Olivier Preis, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Alain Delboulbé, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Gérard Zins, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Patrick Rabou, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Jean-Luc Beuzit, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Sarah Dandy, Office National d'Etudes et Recherches Aérospatiales (France)
Jean-François Sauvage, Office National d'Etudes et Recherches Aérospatiales (France)
Thierry Fusco, Office National d'Etudes et Recherches Aérospatiales (France)
Emmanuel Aller-Carpentier, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Markus Kasper, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Norbert Hubin, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)


Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

© SPIE. Terms of Use
Back to Top