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Optimizing Fourier-Filtering WFS to reach sensitivity close to the fundamental limit
Vincent Chambouleyron, Olivier Fauvarque, Cédric Plantet +5
To reach the full potential of the new generation of ground based telescopes, an extremely fine adjustment of the phase is required. Wavefront control and correction before detecti…
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…
HARMONI at ELT: A Zernike wavefront sensor for the high-contrast module -- Testbed results with realistic observation conditions
Adrien Hours, Alexis Carlotti, David Mouillet +10
ELT-HARMONI is the first light visible and near-IR integral field spectrograph (IFS) for the ELT. It covers a large spectral range from 450nm to 2450nm with resolving powers from 3…
Adapting the pyramid wavefront sensor for pupil fragmentation of the ELT class telescopes
Nicolas Levraud, Vincent Chambouleyron, Olivier Fauvarque +8
The next generation of Extremely Large Telescope (24 to 39m diameter) will suffer from the so-called "pupil fragmentation" problem. Due to their pupil shape complexity (segmentatio…
RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 lambda/D
N. Blind, B. Chazelas, J. Kühn +13
RISTRETTO is the evolution of the original idea of coupling the VLT instruments SPHERE and ESPRESSO, aiming at High Dispersion Coronagraphy. RISTRETTO is a visitor instrument that…