Buscar
Mostrando ítems 1-10 de 180
VLT/SPHERE- and ALMA-based shape reconstruction of asteroid (3) Juno*
(EDP Sciences, 2015)
We use the recently released Atacama Large Millimeter Array (ALMA) and VLT/SPHERE science verification data, together with earlier adaptive-optics images, stellar occultation, and lightcurve data to model the 3D shape and ...
First light for GRAVITY: phase referencing optical interferometry for the very large Telescope Interferometer
(EDP Sciences, 2017)
GRAVITY is a new instrument to coherently combine the light of the European Southern Observatory Very Large Telescope Interferometer to form a telescope with an equivalent 130m diameter angular resolution and a collecting ...
Structural characterization of hair fiber by optical coherence tomography (OCT)
(Society of Photho-optical Instrumentation Engineers, 2015)
Adaptive telescope for confocal photothermal microscopy of irregular surfaces
(Society of Photo-Optical Instrumentation Engineers, 2021-04-10)
An adaptive telescope was developed to perform measurements using the confocal photothermal microscopy technique. The telescope automatically aligns to reinject the reflected probe beam as the measurement scans over irregular ...
Multi-Conjugate Adaptive Optics VLT imaging of the distant old open cluster FSR 1415
(WILEY-BLACKWELL PUBLISHING, INC, 2008)
We employ the recently installed near-infrared Multi-Conjugate Adaptive Optics demonstrator (MAD) to determine the basic properties of a newly identified, old and distant, Galactic open cluster (FSR 1415). The MAD facility ...
Using artificial neural networks for open-loop tomography
(OPTICAL SOC AMER, 2012)
Modern adaptive optics (AO) systems for large telescopes require tomographic techniques to reconstruct the phase aberrations induced by the turbulent atmosphere along a line of sight to a target which is angularly separated ...
Lessons learned from SPHERE for the astrometric strategy of the next generation of exoplanet imaging instruments
(Spie-Soc Photo-Optical Instrumentation Engineers, 2021)
Measuring the orbits of directly imaged exoplanets requires precise astrometry at the milliarcsec level over long periods of time due to their wide separation to the stars (greater than or similar to 10 au) and long orbital ...