The Phase-Shifted Zernike wave-front sensor

Type Proceedings paper
Date 2022
Language English
Author(s) Cisse Mahawa1, 2, Chambouleyron Vincent1, Fauvarque Olivier3, Bond Charlotte Z.4, Levraud Nicolas2, 5, Sauvage Jean -Francois2, Neichel Benoit1, Fusco Thierry2
Affiliation(s) 1 : Aix Marseille Univ., CNRS, CNES, Lab. d'Astrophysique de Marseille (France)
2 : DOTA, ONERA, Univ. Paris Saclay (France)
3 : IFREMER, Lab. Detection, Capteurs et Mesures (LDCM) (France)
4 : UK Astronomy Technology Ctr. (United Kingdom)
5 : INAF, Osservatorio Astrofisico di Arcetri (Italy)
Meeting Conference on Adaptive Optics Systems VIII Part of SPIE Astronomical Telescopes and Instrumentation Conference, Montreal, CANADA, JUL 17-22, 2022
Source Proceedings SPIE. Volume 12185, Adaptive Optics Systems VIII, 121850X (29 August 2022), 8p. + presentation
DOI 10.1117/12.2628885
Keyword(s) Giant telescopes, adaptive optics, wave-front sensor, high performance, data fusion
Abstract The next generation of Giant Fragmented Telescopes will allow the study of faint and distant objects such as exoplanets. But the structure of the telescope also brings new challenges such as pupil fragmentation or Low-Wind Effect (LWE) that needs to be corrected by the Adaptive Optics (AO) system. The Wave-Front Sensor (WFS) which is the heart of the AO system needs to be able to measure these aberrations. Because of its high sensitivity, the Zernike Wave-Front Sensor (ZWFS) appears to be a viable candidate as a 2nd stage instrument to measure telescope seeing or differential piston. However, its use is limited by its small dynamic range. We propose here a new concept of WFS based on the ZWFS with a better dynamic range : the Phase Shifted ZWFS (Phase-Shifted ZWFS).
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Cisse Mahawa, Chambouleyron Vincent, Fauvarque Olivier, Bond Charlotte Z., Levraud Nicolas, Sauvage Jean -Francois, Neichel Benoit, Fusco Thierry (2022). The Phase-Shifted Zernike wave-front sensor. Proceedings SPIE. Volume 12185, Adaptive Optics Systems VIII, 121850X (29 August 2022), 8p. + presentation.