38 citations · 109 across the 11 of their papers we have counts for
8 papers · 1 filter
Reinforcement learning for post-coronagraphic wavefront control
Manuela Castañeda-Medina, Yann Gutierrez, Johan Mazoyer +3
Direct imaging of exoplanets is limited by the extreme contrast between the star and the planets, which is mitigated using a coronagraph. However, optical aberrations cause starlig…
A Deep Reinforcement Learning Approach to Wavefront Control for Exoplanet Imaging
Yann Gutierrez, Johan Mazoyer, Olivier Herscovici-Schiller +3
Exoplanet imaging uses coronagraphs to block out the bright light from a star, allowing astronomers to observe the much fainter light from planets orbiting the star. However, these…
Integrated photonic-based coronagraphic systems for future space telescopes
Niyati Desai, Lorenzo König, Emiel Por +38
The detection and characterization of Earth-like exoplanets around Sun-like stars is a primary science motivation for the Habitable Worlds Observatory. However, the current best te…
Computation of the lateral shift due to atmospheric refraction
Hanae Labriji, Olivier Herscovici-Schiller, Frédéric Cassaing
Atmospheric refraction modifies the apparent position of objects in the sky. We computed the lateral translation that is to be considered for short-range applications, such as wave…
Coronagraphic phase diversity through residual turbulence: performance study and experimental validation
Olivier Herscovici-Schiller, Jean-François Sauvage, Laurent M. Mugnier +2
Quasi-static aberrations in coronagraphic systems are the ultimate limitation to the capabilities of exoplanet imagers both ground-based and space-based. These aberrations - which…
Status of the MEDUSAE post-processing method to detect circumstellar objects in high-contrast multispectral images
Faustine Cantalloube, Marie Ygouf, Laurent Mugnier +3
The MEDUSAE method (Multispectral Exoplanet Detection Using Simultaneous Aberration Estimation) is dedicated to the detection of exoplanets and disks features in multispectral high…
Experimental validation of joint phase and amplitude wave-front sensing with coronagraphic phase diversity for high-contrast imaging
Olivier Herscovici-Schiller, Laurent M. Mugnier, Pierre Baudoz +3
Context. The next generation of space-borne instruments dedicated to the direct detection of exoplanets requires unprecedented levels of wavefront control precision. Coronagraphic…
An analytic expression for coronagraphic imaging through turbulence. Application to on-sky coronagraphic phase diversity
Olivier Herscovici-Schiller, Laurent M. Mugnier, Jean-François Sauvage
The ultimate performance of coronagraphic high contrast exoplanet imaging systems such as SPHERE or GPI is limited by quasi-static aberrations. These aberrations produce speckles t…