Fringe visibility performance evaluation for long baseline stellar interferometers with adaptive optics

Chueh Ting; Michael Kent Giles

doi:10.1117/12.552331

20 October 2004 Fringe visibility performance evaluation for long baseline stellar interferometers with adaptive optics

Chueh Ting, Michael Kent Giles

Proceedings Volume 5491, New Frontiers in Stellar Interferometry; (2004) https://doi.org/10.1117/12.552331
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

Long baseline stellar interferometers have been considered an essential tool in studying astrophysics; however, fringe visibilities for stellar interferometers with large apertures are often corrupted by atmospheric turbulence. To reduce the atmospheric turbulence effect, adaptive optics may be used to enhance fringe visibility for stellar interferometers with aperture sizes larger than the atmospheric coherence length. Fringe visibility performance evaluation for long baseline stellar interferometers with and without adaptive optics is presented in this paper. The methodologies used in this paper are described as follows: the optical transfer function for stellar interferometers with large apertures is derived first; then, performance metrics, coherence loss factor and Strehl ratio, are defined. Finally, fringe visibility performance with and without adaptive optics for different turbulent strengths is evaluated using computer simulation results. We show that Noll's mean square residual phase error can be used to compare the coherence loss factor of an interferometer with the Strehl ratio of a single telescope.

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Chueh Ting and Michael Kent Giles "Fringe visibility performance evaluation for long baseline stellar interferometers with adaptive optics", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); https://doi.org/10.1117/12.552331

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KEYWORDS

Interferometers

Adaptive optics

Visibility

Atmospheric turbulence

Modulation transfer functions

Telescopes

Atmospheric optics

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