M. Tallon

A disruptive concept making use of cutting-edge technologies for the development of fast, adaptive, and dynamic optical surfaces for achieving high-contrast measurements

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...

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...