A broad-band scalar vortex coronagraph
نویسندگان
چکیده
منابع مشابه
Optical vortex coronagraph.
We describe a method to observe dim exoplanets that eliminates light from the parent star across the entire exit pupil without sacrificing light from the planet by use of a vortex mask of topological charge m = 2.
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Using an optical vortex coronagraph and simple adaptive optics techniques, we have made the first convincing demonstration of an optical vortex coronagraph that is coupled to a star gazing telescope. We suppressed by 97% the primary star of a resolvable binary system, Cor Caroli. The stars had an angular separation of 1.9lambda/D at our imaging camera. The secondary star suffered no suppression...
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Context. Coronagraphy is a powerful technique to achieve high contrast imaging and hence to image faint companions around bright targets. Various concepts have been used in the visible and near-infrared regimes, while coronagraphic applications in the mid-infrared remain nowadays largely unexplored. Vector vortex phase masks based on concentric subwavelength gratings show great promise for such...
متن کاملInstantaneous phase retrieval with the vector vortex coronagraph
1 60 rue des bergers, 75015 Paris, France e-mail: [email protected] 2 Université de Liège, 17 Allée du 6 Août, 4000 Sart Tilman, Belgium 3 European Southern Observatory, Alonso de Cordóva 3107, Vitacura, Santiago, Chile e-mail: [email protected] 4 NASA-Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA 5 Techspace-Aero, route de Liers ...
متن کاملDesign and laboratory demonstration of an achromatic vector vortex coronagraph.
A vector vortex coronagraph (VVC) is one of promising means for imaging extremely faint objects around bright stars such as exoplanets. We present a design of an achromatic VVC, in which an axially-symmetric half-wave plate (AHP) is placed between crossed polarization filters (circular polarizer and analyzer). The circular polarizer and the analyzer are both composed of a polarizer and a quarte...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2013
ISSN: 1365-2966,0035-8711
DOI: 10.1093/mnras/stt1317