205 citations · 498 across the 16 of their papers we have counts for
10 papers · 1 filter
Estimating differential pistons for the Extremely Large Telescope using focal plane imaging and a residual network
P. Janin-Potiron, M. Gray, B. Neichel +6
As the Extremely Large Telescope (ELT) approaches operational status, optimising its imaging performance is critical. A differential piston, arising from either the adaptive optics…
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…
The Three-Sided PyramidWavefront Sensor. I. Simulations and Analysis for Astronomical Adaptive Optics
Lauren Schatz, Jared R. Males, Carlos Correia +11
For ExAO instruments for the Giant Segmented Mirror Telescopes (GSMTs), alternative architectures of WFS are under consideration because there is a tradeoff between detector size,…
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).…
Pyramid wavefront sensor optical gains compensation using a convolutional model
Vincent Chambouleyron, Olivier Fauvarque, Pierre Janin-Potiron +5
Extremely Large Telescopes have overwhelmingly opted for the Pyramid wavefront sensor (PyWFS) over the more widely used Shack-Hartmann WaveFront Sensor (SHWFS) to perform their Sin…
Adaptive optics with programmable Fourier-based wavefront sensors: a spatial light modulator approach to the LOOPS testbed
Pierre Janin-Potiron, Vincent Chambouleyron, Lauren Schatz +10
Wavefront sensors encode phase information of an incoming wavefront into an intensity pattern that can be measured on a camera. Several kinds of wavefront sensors (WFS) are used in…
Kernel formalism applied to Fourier based wave front sensing in presence of residual phases
Olivier Fauvarque, Pierre Janin-Potiron, Carlos Correia +5
In this paper, we describe Fourier-based Wave Front Sensors (WFS) as linear integral operators, characterized by their Kernel. In a first part, we derive the dependency of this qua…
Analytical decomposition of Zernike and hexagonal modes over an hexagonal segmented optical aperture
Pierre Janin-Potiron, Patrice Martinez, Marcel Carbillet
Zernike polynomials are widely used to describe the wavefront phase as they are well suited to the circular geometry of various optical apertures. Non-conventional optical systems,…
Fine cophasing of segmented aperture telescopes with ZELDA, a Zernike wavefront sensor in the diffraction-limited regime
Pierre Janin-Potiron, Mamadou N'Diaye, Patrice Martinez +3
Segmented aperture telescopes require an alignment procedure with successive steps from coarse alignment to monitoring process in order to provide very high optical quality images…
The self-coherent camera as a focal plane fine phasing sensor
Pierre Janin-Potiron, Patrice Martinez, Pierre Baudoz +1
Direct imaging of Earth-like exoplanets requires high contrast imaging capability and high angular resolution. Primary mirror segmentation is a key technological solution for large…