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Proceedings Paper

Comparative study of infrared wavefront sensing solutions for adaptive optics
Author(s): C. Plantet; T. Fusco; N. Guerineau; S. Derelle; C. Robert
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Paper Abstract

The development of new low-noise infrared detectors, such as RAPID (CEA LETI/Sofradir) or SAPHIRA (Selex), has given the possibility to consider infrared wavefront sensing at low ux. We propose here a comparative study of near infrared (J and H bands) wavefront sensing concepts for mid and high orders estimation on a 8m- class telescope, relying on three existing wavefront sensors: the Shack-Hartmann sensor, the pyramid sensor and the quadri-wave lateral shearing interferometer. We consider several conceptual designs using the RAPID camera, making a trade-off between background flux, optical thickness and compatibility with a compact cryostat integration. We then study their sensitivity to noise in order to compare them in different practical scenarios. The pyramid provides the best performance, with a gain up to ∼ 0.5 magnitude, and has an advantageous setup.

Paper Details

Date Published: 11 August 2016
PDF: 9 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 990966 (11 August 2016); doi: 10.1117/12.2232617
Show Author Affiliations
C. Plantet, Univ. Grenoble Alpes, CNRS, IPAG (France)
Aix Marseille Univ., CNRS, LAM (France)
ONERA (France)
T. Fusco, Aix Marseille Univ., CNRS, LAM (France)
ONERA (France)
N. Guerineau, ONERA (France)
S. Derelle, ONERA (France)
C. Robert, ONERA (France)

Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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