109 citations · 293 across the 27 of their papers we have counts for
25 papers · 1 filter
LINC-NIRVANA Commissioning at the Large Binocular Telescope -- Lessons Learned
Kalyan Kumar Radhakrishnan Santhakumari, Carmelo Arcidiacono, Maria Bergomi +11
LINC-NIRVANA (LN) is one of the instruments on-board the Large Binocular Telescope (LBT). LN is a high-resolution, near-infrared imager equipped with an advanced adaptive optics mo…
MAORY: A Multi-conjugate Adaptive Optics RelaY for ELT
Paolo Ciliegi, Guido Agapito, Matteo Aliverti +73
MAORY is the adaptive optics module for ELT providing two gravity invariant ports with the same optical quality for two different client instruments. It enable high angular resolut…
Optical design trade-off study for the AO module of MAVIS
Davide Greggio, Simone Di Filippo, Demetrio Magrin +18
MAVIS (MCAO-Assisted Visible Imager and Spectrograph) is an instrument proposed for the VLT Adaptive Optics Facility (AOF), which is currently in the phase-A conceptual design stud…
INGOT Wavefront Sensor: from the optical design to a preliminary laboratory test
Simone Di Filippo, Davide Greggio, Maria Bergomi +13
The Ingot wavefront sensor is a novel pupil-plane wavefront sensor, specifically designed to cope with the elongation typical of the extended nature of the Laser Guide Star (LGS).…
INGOT WFS for LGSs: First Results from Simulations
Elisa Portaluri, Valentina Viotto, Roberto Ragazzoni +10
The Ingot WFS, a Pyramid-like WFS, has been proposed as a relief to the LGS spot elongation. Actually, the artificial sources are confined in an excited cigar-shaped region in the…
Deep observations with an ELT in the Global Multi Conjugated Adaptive Optics perspective
Elisa Portaluri, Valentina Viotto, Roberto Ragazzoni +6
Deep observations of the Universe, usually as a part of sky surveys, are one of the symbols of the modern astronomy because they can allow big collaborations, exploiting multiple f…
Pupil plane wavefront sensing for extended and 3D sources
Roberto Ragazzoni, Valentina Viotto, Elisa Portaluri +11
The basic outline of a pupil plane WaveFront Sensor is reviewed taking into account that the source to be sensed could be different from an unresolved source, i.e. it is extended,…
INGOT Wavefront Sensor: Simulation of Pupil Images
Valentina Viotto, Elisa Portaluri, Carmelo Arcidiacono +9
The ingot wavefront sensor (I-WFS) has been proposed, for ELT-like apertures, as a possible pupil plane WFS, to cope with the geometrical characteristics of a laser guide star (LGS…
XAO-assisted coronagraphy with SHARK NIR: from simulations to laboratory tests
Gabriele Umbriaco, Elena Carolo, Daniele Vassallo +22
Several Extreme Adaptive Optics (XAO) systems dedicated to the detection and characterisation of the exoplanets are currently in operation for 8-10 meter class telescopes. Coronagr…
Prospects of Deep Field Surveys with Global-MCAO on an ELT
Elisa Portaluri, Valentina Viotto, Roberto Ragazzoni +12
Several astronomical surveys aimed at the investigation of the extragalactic components were carried out in order to map systematically the universe and its constituents. An excell…
A Holographic Diffuser Generalised Optical Differentiation Wavefront Sensor
Luca Marafatto, Roberto Ragazzoni, Daniele Vassallo +12
The wavefront sensors used today at the biggest World's telescopes have either a high dynamic range or a high sensitivity, and they are subject to a linear trade off between these…
Recovering pyramid WS gain in non-common path aberration correction mode via deformable lens
D. Magrin, S. Bonora, M. Quintavalla +5
It is by now well known that pyramid based wavefront sensors, once in closed loop, have the capability to improve more and more the gain as the reference natural star image size is…
A testing facility for AO on-sky demonstrations at the Copernico's Telescope within the ADONI framework
S. Chinellato, R. Ragazzoni, J. Farinato +21
In the context of ADONI - the ADaptive Optics National laboratory of INAF - we are arranging for a facility, accessible to the AO community, in which visiting multi-purpose instrum…
A virtual coronagraphic test bench for SHARK-NIR, the second-generation high contrast imager for the Large Binocular Telescope
D. Vassallo, E. Carolo, J. Farinato +21
In this article, we present a simulator conceived for the conceptual study of an AO-fed high-contrast coronagraphic imager. The simulator implements physical optics: a complex dist…
Ingot Laser Guide Stars Wavefront Sensing
Roberto Ragazzoni, Elisa Portaluri, Valentina Viotto +11
We revisit one class of z-invariant WaveFront sensor where the LGS is fired aside of the telescope aperture. In this way there is a spatial dependence on the focal plane with respe…
Hierarchichal-segmented AO in order to attain wide field compensation in the visible on an 8m class telescope
Roberto Ragazzoni, Demetrio Magrin, Jacopo Farinato +10
We describe the preliminary optimized layout for a partially optimized concept of an optical-8m class VLT-like 2x2 segmented camera where each channel is assisted by an equivalent…
Multiple spatial frequencies wavefront sensing
Roberto Ragazzoni, Daniele Vassallo, Marco Dima +10
We describe the concept of splitting spatial frequency perturbations into some kind of pupil planes wavefront sensors. Further to the existing approach of dropping higher spatial f…
SHARK-NIR, the coronagraphic camera for LBT, moving toward construction
Jacopo Farinato, Francesca Bacciotti, Carlo Baffa +37
SHARK-NIR is one of the two coronagraphic instruments proposed for the Large Binocular Telescope. Together with SHARK-VIS (performing coronagraphic imaging in the visible domain),…
GMCAO simulation tool development
Valentina Viotto, Elisa Portaluri, Roberto Ragazzoni +6
Global MCAO aims to exploit a very wide technical field of view to find AO-suitable NGSs, with the goal to increase the overall sky coverage. The concept foresees the use of numeri…
The calibration procedure of the LINC-NIRVANA ground and high layer WFS
Carmelo Arcidiacono, Kalyan Kumar Radhakrishnan Santhakumari, Valentina Viotto +12
LINC--NIRVANA (LN) is an MCAO module currently mounted on the Rear Bent Gregorian focus of the Large Binocular Telescope (LBT). It mounts a camera originally designed to realize th…
The Chandra Deep Field South as a test case for Global Multi Conjugate Adaptive Optics
Elisa Portaluri, Valentina Viotto, Roberto Ragazzoni +7
The era of the next generation of giant telescopes requires not only the advent of new technologies but also the development of novel methods, in order to exploit fully the extraor…
High order dark wavefront sensing simulations
Roberto Ragazzoni, Carmelo Arcidiacono, Jacopo Farinato +8
Dark wavefront sensing takes shape following quantum mechanics concepts in which one is able to "see" an object in one path of a two-arm interferometer using an as low as desired a…
Dark tip-tilt sensing
Carmelo Arcidiacono, Roberto Ragazzoni, Valentina Viotto +6
Dark wavefront sensing in its simplest and more crude form is a quad-cell with a round spot of dark ink acting as occulting disk at the center. This sensor exhibits fainter limitin…
Pathfinder first light: alignment, calibration, and commissioning of the LINC-NIRVANA ground-layer adaptive optics subsystem
Derek Kopon, Al Conrad, Carmelo Arcidiacono +15
We present descriptions of the alignment and calibration tests of the Pathfinder, which achieved first light during our 2013 commissioning campaign at the LBT. The full LINC-NIRVAN…