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Proceedings Paper

Interferometric wavefront sensors for extreme adaptive optics on the Thirty Meter Telescope
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Paper Abstract

Direct observation of extrasolar Jovian planets will enable detailed investigation and understanding of the formation of these planet populations and also of their relative abundance. Future large telescopes, such as the Thirty Meter Telescope(TMT), will enable the study of such planet populations at relatively small working distances from the parent star. We present an analysis of an extreme adaptive optics system utilizing a self-referencing phase-shifting interferometer as the primary wave-front sensor. A module of the adaptive optics system consists of a conventional Shack-Hartmann wave-front sensor to provide the initial start-up of the adaptive optics system, thereby placing a significant amount of energy into the core of the point spread function which will act as the reference for the primary interferometric wave-front sensor. The interferometric-based wave-front sensor is shown to provide a significant improvement in the achievable contrast ratio compared with conventional adaptive optics systems containing Shack-Hartmann wave-front sensors.

Paper Details

Date Published: 27 June 2006
PDF: 9 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62725D (27 June 2006); doi: 10.1117/12.672405
Show Author Affiliations
K. L. Baker, Lawrence Livermore National Lab. (United States)
B. A. Macintosh, Lawrence Livermore National Lab. (United States)
D. W. Phillion, Lawrence Livermore National Lab. (United States)
L. A. Poyneer, Lawrence Livermore National Lab. (United States)
B. J. Bauman, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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