SPHERE: the exoplanet imager for the Very Large Telescope
Observations of circumstellar environments that look for the direct signal of exoplanets and
the scattered light from disks have significant instrumental implications. In the past 15 years …
the scattered light from disks have significant instrumental implications. In the past 15 years …
Review of small-angle coronagraphic techniques in the wake of ground-based second-generation adaptive optics systems
Small-angle coronagraphy is technically and scientifically appealing because it enables the
use of smaller telescopes, allows covering wider wavelength ranges, and potentially …
use of smaller telescopes, allows covering wider wavelength ranges, and potentially …
First on-sky SCAO validation of full LQG control with vibration mitigation on the CANARY pathfinder
Adaptive optics provides real time correction of wavefront disturbances on ground based
telescopes. Optimizing control and performance is a key issue for ever more demanding …
telescopes. Optimizing control and performance is a key issue for ever more demanding …
Minimum variance prediction and control for adaptive optics
Adaptive Optics (AO) systems enable to compensate the adverse effects of atmospheric
turbulence on ground-based telescopes' images in real time, using a deformable mirror …
turbulence on ground-based telescopes' images in real time, using a deformable mirror …
SPHERE eXtreme AO control scheme: final performance assessment and on sky validation of the first auto-tuned LQG based operational system
The SPHERE (Spectro-Polarimetry High-contrast Exoplanet Research) instrument is an ESO
project aiming at the direct detection of extra-solar planets. SPHERE has been successfully …
project aiming at the direct detection of extra-solar planets. SPHERE has been successfully …
High-resolution in-vivo human retinal imaging using full-field OCT with optical stabilization of axial motion
P Mecê, J Scholler, K Groux, C Boccara - Biomedical optics express, 2019 - opg.optica.org
Time-domain full-field OCT (FF-OCT) represents an imaging modality capable of recording
high-speed en-face sections of a sample at a given depth. One of the biggest challenges to …
high-speed en-face sections of a sample at a given depth. One of the biggest challenges to …
SAXO: the extreme adaptive optics system of SPHERE (I) system overview and global laboratory performance
The direct imaging of exoplanet is a leading field of today's astronomy. The photons coming
from the planet carry precious information on the chemical composition of its atmosphere …
from the planet carry precious information on the chemical composition of its atmosphere …
Disturbance observer-based control of tip-tilt mirror for mitigating telescope vibrations
T Tang, S Niu, X Chen, B Qi - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
In the ground-based astronomical telescope, the imaging quality is usually affected by tip-tilt
vibrations induced by the telescope structure. Long exposure time of the image sensor is …
vibrations induced by the telescope structure. Long exposure time of the image sensor is …
On-sky results for adaptive optics control with data-driven models on low-order modes
Dedicated tip–tilt loops are commonly implemented on adaptive optics (AO) systems. In
addition, a number of recent high-performance systems feature tip–tilt controllers that are …
addition, a number of recent high-performance systems feature tip–tilt controllers that are …
Vibrations in AO control: a short analysis of on-sky data around the world
C Kulcsár, G Sivo, HF Raynaud… - … Optics Systems III, 2012 - spiedigitallibrary.org
We present in this paper an analysis of several tip-tilt on-sky data registered on adaptive
optics systems installed on different telescopes (Gemini South, William Herschel Telescope …
optics systems installed on different telescopes (Gemini South, William Herschel Telescope …