Apodized Lyot coronagraph for VLT-SPHERE: laboratory tests and performances of a first prototype in the visible

Géraldine Guerri; Sylvie Robbe-Dubois; Jean-Baptiste Daban; Lyu Abe; Richard Douet; Philippe Bendjoya; Farrokh Vakili; Marcel Carbillet; Jean-Luc Beuzit; Pascal Puget; Kjetil Dohlen; David Mouillet

doi:10.1117/12.789688

23 July 2008 Apodized Lyot coronagraph for VLT-SPHERE: laboratory tests and performances of a first prototype in the visible

Géraldine Guerri, Sylvie Robbe-Dubois, Jean-Baptiste Daban, Lyu Abe, Richard Douet, Philippe Bendjoya, Farrokh Vakili, Marcel Carbillet, Jean-Luc Beuzit, Pascal Puget, Kjetil Dohlen, David Mouillet

Author Affiliations +

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 70143J (2008) https://doi.org/10.1117/12.789688
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

We present some of the High Dynamic Range Imaging activities developed around the coronagraphic test-bench of the Laboratoire A. H. Fizeau (Nice). They concern research and development of an Apodized Lyot Coronagraph (ALC) for the VLT-SPHERE instrument and experimental results from our testbed working in the visible domain. We determined by numerical simulations the specifications of the apodizing filter and searched the best technological process to manufacture it. We present the results of the experimental tests on the first apodizer prototype in the visible and the resulting ALC nulling performances. The tests concern particularly the apodizer characterization (average transmission radial profile, global reflectivity and transmittivity in the visible), ALC nulling performances compared with expectations, sensitivity of the ALC performances to misalignments of its components.

Citation Download Citation

Géraldine Guerri, Sylvie Robbe-Dubois, Jean-Baptiste Daban, Lyu Abe, Richard Douet, Philippe Bendjoya, Farrokh Vakili, Marcel Carbillet, Jean-Luc Beuzit, Pascal Puget, Kjetil Dohlen, and David Mouillet "Apodized Lyot coronagraph for VLT-SPHERE: laboratory tests and performances of a first prototype in the visible", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70143J (23 July 2008); https://doi.org/10.1117/12.789688

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available