Suppressing stellar residual light on extremely large telescopes by aperture modulation

Gladysz, Szymon; Ribak, Erez; Femenia, B.; Jolissaint, Laurent; Martinez, Patrice; Soummer, Remi; Aller Carpentier, Emmanuel; Kasper, Markus; Christou, Julian
Referencia bibliográfica

1st AO4ELT conference - Adaptative Optics for Extremely Large Telescopes, held 22-26 June, 2009 in Paris, France. Edited by Y. Clénet, J.-M. Conan, Th. Fusco, and G. Rousset. EDP Sciences, 2010, id.09002

Fecha de publicación:
2010
Número de autores
9
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
Efficient suppression of the residual stellar light is paramount to the success of exoplanet imaging efforts. We present a new approach to diffraction suppression on extremely large telescopes. The method is based on the realization that by obscuring part of the wavefront in the Lyot stop we can change the shape of the corresponding PSF. This obscuration is then modulated leading to modulated Airy pattern, while image of a planet - if present - is only slightly affected. The modulation could then be removed from the set of images, leading to better SNR of the possible planets. Simulation of the European Extremely Large Telescope has been used to test this approach.