59 citations · 574 across the 41 of their papers we have counts for
41 papers
The ESO's Extremely Large Telescope Working Groups
Paolo Padovani, Michele Cirasuolo, Remco van der Burg +82
Since 2005 ESO has been working with its community and industry to develop an extremely large optical/infrared telescope. ESO's Extremely Large Telescope, or ELT for short, is a re…
Three-sided pyramid wavefront sensor. II. Preliminary demonstration on the new CACTI testbed
Lauren Schatz, Johanan Codona, Joseph D. Long +17
The next generation of giant ground and space telescopes will have the light-collecting power to detect and characterize potentially habitable terrestrial exoplanets using high-con…
Super-resolution wavefront reconstruction
Sylvain Oberti, Carlos Correia, Thierry Fusco +2
Super-Resolution (SR) is a technique that seeks to upscale the resolution of a set of measured signals. SR retrieves higher-frequency signal content by combining multiple lower res…
Daytime calibration and testing of the Keck All sky Precision Adaptive Optics Tomography System
Avinash Surendran, Jacques R. Delorme, Carlos M. Correia +12
The development of the Keck All sky Precision Adaptive optics (KAPA) project was initiated in September 2018 to upgrade the Keck I adaptive optics (AO) system to enable laser tomog…
Towards virtual access of adaptive optics telemetry data
Tiago Gomes, Carlos Correia, Lisa Bardou +8
Large amounts of Adaptive-Optics (AO) control loop data and telemetry are currently inaccessible to end-users. Broadening access to those data has the potential to change the AO la…
Key wavefront sensors features for laser-assisted tomographic adaptive optics systems on the Extremely Large Telescope
Thierry Fusco, Guido Agapito, Benoit Neichel +10
Laser guide star (LGS) wave-front sensing (LGSWFS) is a key element of tomographic adaptive optics system. However, when considering Extremely Large Telescope (ELT) scales, the LGS…
The Three-Sided PyramidWavefront Sensor. I. Simulations and Analysis for Astronomical Adaptive Optics
Lauren Schatz, Jared R. Males, Carlos Correia +11
For ExAO instruments for the Giant Segmented Mirror Telescopes (GSMTs), alternative architectures of WFS are under consideration because there is a tradeoff between detector size,…
Simultaneous estimation of segmented telescope phasing errors and non-common path aberrations from adaptive optics corrected images
Masen Lamb, Carlos Correia, Suresh Sivanandam +2
We investigate the focal plane wavefront sensing technique, known as Phase Diversity, at the scientific focal plane of a segmented mirror telescope with an adaptive optics (AO) sys…
Closed Loop Predictive Control of Adaptive Optics Systems with Convolutional Neural Networks
Robin Swanson, Masen Lamb, Carlos Correia +2
Predictive wavefront control is an important and rapidly developing field of adaptive optics (AO). Through the prediction of future wavefront effects, the inherent AO system servo-…
Pyramid wavefront sensor optical gains compensation using a convolutional model
Vincent Chambouleyron, Olivier Fauvarque, Pierre Janin-Potiron +5
Extremely Large Telescopes have overwhelmingly opted for the Pyramid wavefront sensor (PyWFS) over the more widely used Shack-Hartmann WaveFront Sensor (SHWFS) to perform their Sin…
Design of the HARMONI Pyramid WFS module
Noah Schwartz, Jean-François Sauvage, Edgard Renault +12
Current designs for all three extremely large telescopes show the overwhelming adoption of the pyramid wavefront sensor (P-WFS) as the WFS of choice for adaptive optics (AO) system…
Performance limits of adaptive-optics/high-contrast imagers with pyramid wave-front sensors
Carlos M. Correia, Olivier Fauvarque, Charlotte Z. Bond +3
Advanced AO systems will likely utilise Pyramid wave-front sensors (PWFS) over the traditional Shack-Hartmann sensor in the quest for increased sensitivity, peak performance and ul…
The wind-driven halo in high-contrast images I: analysis from the focal plane images of SPHERE
Faustine Cantalloube, Ollie Farley, Julien Milli +9
Context. The wind driven halo is a feature observed within the images delivered by the latest generation of ground-based instruments equipped with an extreme adaptive optics system…
Entering into the Wide Field Adaptive Optics Era on Maunakea
Gaetano Sivo, John Blakeslee, Jennifer Lotz +32
As part of the National Science Foundation funded "Gemini in the Era of MultiMessenger Astronomy" (GEMMA) program, Gemini Observatory is developing GNAO, a widefield adaptive optic…
Identifying optical turbulence profiles for realistic tomographic error in adaptive optics
O. J. D. Farley, J. Osborn, T. Morris +4
For extremely large telescopes, adaptive optics will be required to correct the Earth's turbulent atmosphere. The performance of tomographic adaptive optics is strongly dependent o…
Adaptive optics with programmable Fourier-based wavefront sensors: a spatial light modulator approach to the LOOPS testbed
Pierre Janin-Potiron, Vincent Chambouleyron, Lauren Schatz +10
Wavefront sensors encode phase information of an incoming wavefront into an intensity pattern that can be measured on a camera. Several kinds of wavefront sensors (WFS) are used in…
PRIME: Psf Reconstruction and Identification for Multiple sources characterization Enhancement. Application to Keck NIRC2 imager
O. Beltramo-Martin, C. M. Correia, S. Ragland +4
In order to enhance accuracy of astrophysical estimates obtained on Adaptive-optics (AO) images, such as photometry and astrometry, we investigate a new concept to constrain the Po…
Kernel formalism applied to Fourier based wave front sensing in presence of residual phases
Olivier Fauvarque, Pierre Janin-Potiron, Carlos Correia +5
In this paper, we describe Fourier-based Wave Front Sensors (WFS) as linear integral operators, characterized by their Kernel. In a first part, we derive the dependency of this qua…
PEPITO: atmospheric Profiling from short-Exposure focalPlane Images in seeing-limiTed mOde
Olivier Beltramo-Martin, Nazim A. Bharmal, Carlos M. Correia
Atmospheric profiling is a requirement for controlling wide-field Adaptive Optics (AO) instruments, analyzing the AO performance with respect to the observing conditions and predic…
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…