Search: onr:"swepub:oai:DiVA.org:uu-295132" >
Performance evaluat...
Performance evaluation of mid-IR vortex coronagraphs with centrally obscured segmented pupils
-
- Carlomagno, Brunella (author)
- Université de Liège, Belgium
-
- Absil, Olivier (author)
- Université de Liège, Belgium
-
- Ruane, Garreth (author)
- Rochester Institute of Technology, USA
-
show more...
-
- Mawet, Dimitri (author)
- California Institute of Technology/NASA Jet Propulsion Laboratory, USA
-
- Feldt, Markus (author)
- MPIA, Heidelberg, Germany
-
- Hippler, Stefan (author)
- MPIA, Heidelberg, Germany
-
- Delacroix, Christian (author)
- Centre de Recherche Astrophysique de Lyon, France
-
- Forsberg, Pontus (author)
- Uppsala universitet,Tillämpad materialvetenskap
-
- Habraken, Serge (author)
- Université de Liège, Belgium
-
- Huby, Elsa (author)
- Université de Liège, Belgium
-
- Karlsson, Mikael (author)
- Uppsala universitet,Tillämpad materialvetenskap
-
- Surdej, Jean (author)
- Université de Liège, Belgium
-
- Vargas Catalan, Ernesto (author)
- Uppsala universitet,Tillämpad materialvetenskap
-
show less...
-
(creator_code:org_t)
- 2015
- 2015
- English.
- Related links:
-
https://urn.kb.se/re...
Abstract
Subject headings
Close
- In its original design, the E-ELT/Metis instrument envisages a vortex coronagraph in the mid-IR regime for detection and characterization of exoplanets, with a contrast of 1e-4 at 2 lambda/D (~40 mas in L band). The AGPM (Annular Groove Phase Mask) is a vortex phase mask with impressive characteristics: small inner working angle, high throughput, achromaticity. A non-perfectly circular pupil and non-flat input wavefront result in a starlight leakage, degrading the performance of the vortex coronagraph. In this work, we present end-to-end performance simulations using Fourier optical propagation to determine the quality of the starlight rejection obtained with an infrared vortex coronagraph. We first analyse the performance facing E-ELT pupil variations (segmentations, central obscuration, spiders, missing segments), then pointing jitter and random adaptive optics residual phase screens are introduced to derive more realistic performance. Finally, more advanced concepts of the infrared vortex coronagraph are presented, in order to compensate for performance degradation.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publication and Content Type
- ref (subject category)
- kon (subject category)
To the university's database
- By the author/editor
-
Carlomagno, Brun ...
-
Absil, Olivier
-
Ruane, Garreth
-
Mawet, Dimitri
-
Feldt, Markus
-
Hippler, Stefan
-
show more...
-
Delacroix, Chris ...
-
Forsberg, Pontus
-
Habraken, Serge
-
Huby, Elsa
-
Karlsson, Mikael
-
Surdej, Jean
-
Vargas Catalan, ...
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- By the university
-
Uppsala University