[en] Since 2005, we have been developing at the University of Liège an implementation of the vector vortex coronagraph based on concentric sub-wavelength gratings, referred to as the Annular Groove Phase Mask (AGPM). Science-grade mid-infrared AGPMs were produced in 2012 for the first time, using plasma etching of synthetic diamond substrates. Three of them have recently been installed on world-leading diffraction-limited infrared cameras. We are now in the process of exploiting this first generation of vortex phase masks. We are also preparing the future by improving the manufacturing process and quality of our vortices, by testing them on our infrared coronagraphic test bench and by developing new methods to improve the cancellation of stellar light. All these developments are specially geared up towards future application on ELTs.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Absil, Olivier ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
The VORTEX project
Publication date :
06 October 2014
Event name :
Combining Coronagraphs and Wavefront Control
Event organizer :
Leiden Observatory
Event place :
Leiden, Netherlands
Event date :
6 - 10 October 2014
By request :
Yes
Audience :
International
European Projects :
FP7 - 337569 - VORTEX - Taking extrasolar planet imaging to a new level with vector vortex coronagraphy
