High-charge and multiple-star vortex coronagraphy from stacked vector vortex phase masks
Language
en
Article de revue
This item was published in
Optics Letters. 2018, vol. 43, n° 3, p. 383-386
Optical Society of America - OSA Publishing
English Abstract
Optical vortex phase masks are now installed at many ground-based large telescopes for high-contrast astronomical imaging. To date, such instrumental advances have been restricted to the use of helical phase masks of the ...Read more >
Optical vortex phase masks are now installed at many ground-based large telescopes for high-contrast astronomical imaging. To date, such instrumental advances have been restricted to the use of helical phase masks of the lowest even order, while future giant telescopes will require high-order masks. Here we propose a single-stage on-axis scheme to create high-order vortex coronagraphs based on second-order vortex phase masks. By extending our approach to an off-axis design, we also explore the implementation of multiple-star vortex coronagraphy. An experimental laboratory demonstration is reported and supported by numerical simulations. These results offer a practical roadmap to the development of future coronagraphic tools with enhanced performances.Read less <
English Keywords
Spatial filtering
Optical vortices
Astronomical optics
ANR Project
Traitement hyperspectral du moment angulaire orbital de la lumière - ANR-15-CE30-0018
Origin
Hal imported