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Sponsored Artificial Intelligence: A Modern Approach, Global Edition Artificial Intelligence: A Modern Approach, Global Edition

Author

J. Mazoyer

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Open access Aug 2026

SAXO+, the second-stage adaptive optics for SPHERE: high contrast performance analysis

The SAXO+ system is a planned second-stage Adaptive Optics (AO) upgrade to the VLT/SPHERE eXtreme Adaptive Optics (SAXO) system. This consists of adding a second adaptive optics stage using a near-infrared pyramid wavefront sensor to record images of fainter exoplanets around redder stars. In this work, we compare the...

M. Langlois, C. B'echet, L. Schreiber et al. · 2 citations
#artificial intelligence Open access Aug 2026

Reinforcement learning for post-coronagraphic wavefront control

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 starlight leakage through the coronagraph, producing speckles that obscure the planetary signal. Achieving the required contrast levels demands wav...

Manuela Castañeda-Medina, Yann Gutierrez, J. Mazoyer et al. · 0 citations
Review Open access Aug 2026

SAXO+, the second-stage adaptive optics for SPHERE: a review of six selected control algorithms and the results achieved to date

SAXO+ is the second-stage adaptive optics (AO) system that will be added in cascade after SPHERE’s current extreme AO system at the VLT. This upgrade of SPHERE aims to improve coronagraphic contrast by a factor of 10 or more, close to the star, and to extend the performance to fainter, redder targets. To achieve these...

M. Tallon, C. B'echet, I. Dinis et al. · 5 citations

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