Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-15
Astrophys.J.600:1091,2004
Astronomy and Astrophysics
Astrophysics
14 Pages, 7 Figures, Accepted to Astrophysical Journal
Scientific paper
10.1086/379872
The properties of metal thin films have been largely overlooked in discussions of the technical limitations and problems that arise in the field of direct detection of exoplanets. Here, polarization properties and anisotropy properties of highly reflecting thin metal films are examined within the context of the requirements for the ultra-low scattered-light system performance of coronagraphs applied to space and ground-based high-contrast, white-light astronomy. Wavelength-dependent optical constants for highly reflecting thin metal films, taken from the literature are used to calculate the polarization-dependent transmissivity of a typical coronagraph. The effects of degraded performance on the astronomical science are examined. Suggestions are made for future work.
Breckinridge James B.
Oppenheimer Ben R.
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