Fast focal plane wavefront sensing as a second stage adaptive optics wavefront sensor

2020 ◽  
Author(s):  
Benjamin L. Gerard ◽  
Jean-Pierre Véran ◽  
Garima Singh ◽  
Glen Herriot ◽  
Olivier Lardière ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Focal Plane ◽  
Wavefront Sensor ◽  
Wavefront Sensing ◽  
Second Stage ◽  
Plane Wavefront

scholarly journals Extremely fast focal-plane wavefront sensing for extreme adaptive optics

2012 ◽  
Author(s):  
Christoph U. Keller ◽  
Visa Korkiakoski ◽  
Niek Doelman ◽  
Rufus Fraanje ◽  
Raluca Andrei ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Focal Plane ◽  
Wavefront Sensing ◽  
Plane Wavefront

scholarly journals Focal-plane wavefront sensing with high-order adaptive optics systems

2014 ◽  
Author(s):  
Visa Korkiakoski ◽  
Christoph U. Keller ◽  
Niek Doelman ◽  
Matthew Kenworthy ◽  
Gilles Otten ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Focal Plane ◽  
High Order ◽  
Wavefront Sensing ◽  
Plane Wavefront

scholarly journals SCExAO: First Results and On-Sky Performance

2013 ◽  
Vol 8 (S299) ◽  
pp. 34-35 ◽  
Author(s):  
Thayne Currie ◽  
Olivier Guyon ◽  
Frantz Martinache ◽  
Christophe Clergeon ◽  
Michael McElwain ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Focal Plane ◽  
Closed Loop ◽  
Giant Planets ◽  
Wavefront Sensor ◽  
Strehl Ratio ◽  
Wavefront Control ◽  
Contrast Gain ◽  
First Results ◽  
Plane Wavefront

AbstractWe present new on-sky results for the Subaru Coronagraphic Extreme Adaptive Optics imager (SCExAO) verifying and quantifying the contrast gain enabled by key components: the closed-loop coronagraphic low-order wavefront sensor (CLOWFS) and focal plane wavefront control (“speckle nulling”). SCExAO will soon be coupled with a high-order, Pyramid wavefront sensor which will yield > 90% Strehl ratio and enable 106–107 contrast at small angular separations allowing us to image gas giant planets at solar system scales. Upcoming instruments like VAMPIRES, FIRST, and CHARIS will expand SCExAO's science capabilities.

scholarly journals An all-photonic focal-plane wavefront sensor

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Barnaby R. M. Norris ◽  
Jin Wei ◽  
Christopher H. Betters ◽  
Alison Wong ◽  
Sergio G. Leon-Saval
Keyword(s):  
Adaptive Optics ◽  
Focal Plane ◽  
Mean Squared Error ◽  
Single Mode ◽  
Wavefront Sensor ◽  
Wavefront Sensors ◽  
Single Mode Fibre ◽  
Squared Error ◽  
Wavefront Error ◽  
Plane Wavefront

Abstract Adaptive optics (AO) is critical in astronomy, optical communications and remote sensing to deal with the rapid blurring caused by the Earth’s turbulent atmosphere. But current AO systems are limited by their wavefront sensors, which need to be in an optical plane non-common to the science image and are insensitive to certain wavefront-error modes. Here we present a wavefront sensor based on a photonic lantern fibre-mode-converter and deep learning, which can be placed at the same focal plane as the science image, and is optimal for single-mode fibre injection. By measuring the intensities of an array of single-mode outputs, both phase and amplitude information on the incident wavefront can be reconstructed. We demonstrate the concept with simulations and an experimental realisation wherein Zernike wavefront errors are recovered from focal-plane measurements to a precision of 5.1 × 10−3 π radians root-mean-squared-error.

scholarly journals Focal Plane Wavefront Sensing with the FAST TGV Coronagraph

2020 ◽  
Vol 132 (1012) ◽  
pp. 064401
Author(s):  
Benjamin L. Gerard ◽  
Christian Marois
Keyword(s):  
Focal Plane ◽  
Wavefront Sensing ◽  
Plane Wavefront

On-sky results of focal-plane wavefront sensing and control with the asymmetric pupil vector-apodizing phase plate coronagraph

2020 ◽  
Author(s):  
Steven P. Bos ◽  
Kelsey L. Miller ◽  
Julien Lozi ◽  
Olivier Guyon ◽  
Vikram Mark Radhakrishnan ◽  
...  
Keyword(s):  
Focal Plane ◽  
Phase Plate ◽  
Wavefront Sensing ◽  
Plane Wavefront ◽  
And Control

scholarly journals Self-coherent camera as a focal plane wavefront sensor: simulations

2009 ◽  
Vol 509 ◽  
pp. A31 ◽  
Author(s):  
R. Galicher ◽  
P. Baudoz ◽  
G. Rousset ◽  
J. Totems ◽  
M. Mas
Keyword(s):  
Focal Plane ◽  
Wavefront Sensor ◽  
Plane Wavefront
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