59 citations · 574 across the 41 of their papers we have counts for
9 papers · 1 filter
Overview of the European Extremely Large Telescope and its instrument suite
B. Neichel, D. Mouillet, E. Gendron +3
The European Extremely Large Telescope will see first lights by the end of 2024. With a diameter of almost 40 meters, it will be the biggest optical telescope ever built from the g…
Advanced control laws for the new generation of AO systems
Carlos M. Correia
Geared by the increasing need for enhanced performance, both optical and computational, new dynamic control laws have been researched in recent years for next generation adaptive o…
Estimation of atmospheric turbulence parameters from Shack-Hartmann wavefront sensor measurements
Paulo P. Andrade, Paulo J. V. Garcia, Carlos M. Correia +2
The estimation of atmospheric turbulence parameters is of relevance for: a) site evaluation & characterisation; b) prediction of the point spread function; c) live assessment of er…
Sensing and control of segmented mirrors with a pyramid wavefront sensor in the presence of spiders
Noah Schwartz, Jean-François Sauvage, Carlos Correia +9
The segmentation of the telescope pupil (by spiders & the segmented M4) create areas of phase isolated by the width of the spiders on the wavefront sensor (WFS), breaking the spati…
Focal plane profiling based on single conjugate adaptive optics compensated images
O. Beltramo-Martin, C. M. Correia, B. Neichel +1
Knowledge of the atmospheric turbulence in the telescope line-of-sight is crucial for wide-field observations assisted by adaptive optics (AO), for which the Point Spread Function…
Gemini Infrared Multi-Object Spectrograph: Instrument Overview
Suresh Sivanandam, Scott Chapman, Luc Simard +27
The Gemini Infrared Multi-Object Spectrograph (GIRMOS) is a powerful new instrument being built to facility-class standards for the Gemini telescope. It takes advantage of the late…
Fast Iterative Tomographic Wave-front Estimation with Recursive Toeplitz Reconstructor Structure for Large Scale Systems
Yoshito H. Ono, Carlos Correia, Rodolphe Conan +3
Tomographic wave-front reconstruction is the main computational bottleneck to realize real-time correction for turbulence-induced wave-front aberrations in future laser-assisted to…
Off-axis point spread function characterisation in laser-guide star adaptive optics systems
O. Beltramo-Martin, C. M. Correia, E. Mieda +5
Adaptive optics (AO) restore the angular resolution of ground-based telescopes, but at the cost of delivering a time- and space-varying point spread function (PSF) with a complex s…
Peak-locking centroid bias in Shack-Hartmann wavefront sensing
Narsireddy Anugu, Paulo J. V. Garcia, Carlos M. Correia
Shack-Hartmann wavefront sensing relies on accurate spot centre measurement. Several algorithms were developed with this aim, mostly focused on precision, i.e. minimizing random er…