Performance of spatial filtering wavefront sensor for the phasing of segmented telescopes

A. Cheffot; L. Noethe; K. Dohlen; A. Vigan; E. Hugot; S. Lévêque; J.-F. Sauvage

doi:10.1117/12.2311659

6 July 2018 Performance of spatial filtering wavefront sensor for the phasing of segmented telescopes

A. Cheffot, L. Noethe, K. Dohlen, A. Vigan, E. Hugot, S. Lévêque , J.-F. Sauvage

Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 1070062 (2018) https://doi.org/10.1117/12.2311659
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The next generation of extremely large telescopes requires the use of segmented mirrors. This technology needs specific wave front sensors to measure the alignment and phasing state. This paper compares two specific technologies for the measurement of wavefront steps between segments: a simple pin hole and a phase contrast sensor. The efficiency of each sensor will be quantified by calculating the Fisher information, first, under ideal conditions, then including the effects of sampling and atmospheric turbulence.

Citation Download Citation

A. Cheffot, L. Noethe, K. Dohlen, A. Vigan, E. Hugot, S. Lévêque , and J.-F. Sauvage "Performance of spatial filtering wavefront sensor for the phasing of segmented telescopes", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070062 (6 July 2018); https://doi.org/10.1117/12.2311659

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