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Proceedings Paper

The effects of space telescope primary mirror segment errors on coronagraph instrument performance
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Paper Abstract

Direct imaging of potentially habitable planets is challenging because of the relative proximity of the planet to the star and the low flux ratio (typically well under 1e-9 in the visible) of the planet relative to the star. Future exoplanet direct imaging telescopes like the Habitable Exoplanet Imaging Mission (HabEx) or the Large UV/Optical/Infrared Surveyor (LUVOIR) will hence require large collecting apertures with very low wavefront errors. The feasibility of these missions is in a large part dependent on the sensitivity of the achieved contrast at small working angles to imperfections and motions of the telescope optics. In past studies, we explored the effect of applying specific modes to segmented and monolith telescopes on the contrast leakage of a coronagraph. Here we present a revised analysis which, though not substantially different from the previous results, includes a mode careful theoretical examination of the issues involved. We conclude by highlighting the importance of the temporal characteristics of the errors.

Paper Details

Date Published: 5 September 2017
PDF: 9 pages
Proc. SPIE 10398, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII, 103980G (5 September 2017); doi: 10.1117/12.2273072
Show Author Affiliations
Bijan Nemati, The Univ. of Alabama in Huntsville (United States)
Mark T. Stahl, NASA Marshall Space Flight Ctr. (United States)
H. Philip Stahl, NASA Marshall Space Flight Ctr. (United States)
Stuart B. Shaklan, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 10398:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII
Howard A. MacEwen; James B. Breckinridge, Editor(s)

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