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High-contrast imager for complex aperture telescopes (HiCAT): 8. Dark zone demonstration with simultaneous closed-loop low-order wavefront sensing and control
Rémi Soummer, Emiel H. Por, Raphaël Pourcelot +27
We present recent laboratory results demonstrating high-contrast coronagraphy for the future space-based large IR/Optical/Ultraviolet telescope recommended by the Decadal Survey. T…
Strategy for sensing petal mode in presence of AO residual turbulence with pyramid wavefront sensor
Nicolas Levraud, Vincent Chambouleyron, Jean François Sauvage +9
With the Extremely Large Telescope-generation telescopes come new challenges. The complexity of these telescopes' pupil creates new problems for Adaptive Optics. In particular, the…
Modeling noise propagation in Fourier-filtering wavefront sensing, fundamental limits and quantitative comparison
Vincent Chambouleyron, Olivier Fauvarque, Cédric Plantet +5
Adaptive optics (AO) is a technique allowing to drastically improve ground-based telescopes angular resolution. The wavefront sensor (WFS) is one of the key components of such syst…
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…