158 citations · 1.4k across the 79 of their papers we have counts for
8 papers · 1 filter
Calibration of the island effect: Experimental validation of closed-loop focal plane wavefront control on Subaru/SCExAO
Mamadou N'Diaye, Frantz Martinache, Nemanja Jovanovic +5
Island effect (IE) aberrations are induced by differential pistons, tips, and tilts between neighboring pupil segments on ground-based telescopes, which severely limit the observat…
Capabilities of ACAD-OSM, an active method for the correction of aperture discontinuities
Johan Mazoyer, Laurent Pueyo, Mamadou N'Diaye +4
The increasing complexity of the aperture geometry of the future space- and ground based-telescopes will limit the performance of the next generation of coronagraphic instruments f…
Correcting for the effects of pupil discontinuities with the ACAD method
Johan Mazoyer, Laurent Pueyo, Mamadou N'Diaye +3
The current generation of ground-based coronagraphic instruments uses deformable mirrors to correct for phase errors and to improve contrast levels at small angular separations. Im…
Active correction of aperture discontinuities (ACAD) for space telescope pupils: a parametic analysis
Johan Mazoyer, Laurent Pueyo, Colin Norman +6
As the performance of coronagraphs improves, the achievable contrast is more and more dependent of the shape of the pupil. The future generation of space and ground based coronagra…
Active correction of aperture discontinuities - optimized stroke minimization II: optimization for future missions
Johan Mazoyer, Laurent Pueyo, Mamadou N'Diaye +5
High-contrast imaging and spectroscopy provide unique constraints for exoplanet formation models as well as for planetary atmosphere models. Instrumentation techniques in this fiel…
Active correction of aperture discontinuities - optimized stroke minimization I: a new adaptive interaction matrix algorithm
J. Mazoyer, L. Pueyo, M. N'Diaye +7
Future searches for biomarkers on habitable exoplanets will rely on telescope instruments that achieve extremely high contrast at small planet-to-star angular separations. Coronagr…
Fine cophasing of segmented aperture telescopes with ZELDA, a Zernike wavefront sensor in the diffraction-limited regime
Pierre Janin-Potiron, Mamadou N'Diaye, Patrice Martinez +3
Segmented aperture telescopes require an alignment procedure with successive steps from coarse alignment to monitoring process in order to provide very high optical quality images…
Polynomial Apodizers for Centrally Obscured Vortex Coronagraphs
Kevin Fogarty, Laurent Pueyo, Johan Mazoyer +1
Several coronagraph designs have been proposed over the last two decades to directly image exoplanets. Among these designs, the vector vortex coronagraphs provide theoretically per…