28 July 2014 Three possible types of coronagraphs for the E-ELT PCS instrument
Author Affiliations +
Abstract
The spectral characterization in the near infrared of Neptune-like planets and super-Earths is one of the main science objectives of the E-ELT. The planetary camera and spectrograph (PCS) will be in charge of making it possible. We have designed three different instruments: pure apodizers, apodized Lyot coronagraphs, and apodized vortex coronagraphs. In each cases the central obscuration and the secondary supports are taken into account in the design of the apodizer. We present a trade study of the imaging performance of these coronagraphs, and we describe how sensitive these coronagraphs are to various aberrations. This is used to assess the potential complementarity between these three types of instruments. Finally, we also consider the feasibility of an active control of aperture discontinuities and/or a phase induced amplitude apodization using the two deformable mirrors of an extreme adaptive optics system associated with the coronagraphs.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexis Carlotti, Alexis Carlotti, Mamadou N'Diaye, Mamadou N'Diaye, Laurent Pueyo, Laurent Pueyo, Dimitri Mawet, Dimitri Mawet, } "Three possible types of coronagraphs for the E-ELT PCS instrument", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91479D (28 July 2014); doi: 10.1117/12.2056842; https://doi.org/10.1117/12.2056842
PROCEEDINGS
12 PAGES


SHARE
Back to Top