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Proceedings Paper

Optical demonstration of a starshade at flight Fresnel numbers
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Paper Abstract

A starshade is a specially designed opaque screen to suppress starlight and remove the effects of diffraction at the edge. The intensity at the pupil plane in the shadow is dark enough to detect Earth-like exoplanets by using direct imaging. At Princeton, we have designed and built a testbed that allows verification of scaled starshade designs whose suppressed shadow is mathematically identical to that of space starshade. The starshade testbed uses a 77.2 m optical propagation distance to realize the flight Fresnel number of 14.5. Here, we present lab result of a revised sample design operating at a flight Fresnel number. We compare the experimental results with simulations that predict the ultimate contrast performance.

Paper Details

Date Published: 1 September 2017
PDF: 12 pages
Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104001A (1 September 2017); doi: 10.1117/12.2273287
Show Author Affiliations
Yunjong Kim, Princeton Univ. (United States)
Anthony Harness, Princeton Univ. (United States)
Dan Sirbu, NASA Ames Research Ctr. (United States)
Mengya Hu, Princeton Univ. (United States)
Mike Galvin, Princeton Univ. (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)
Robert J. Vanderbei, Princeton Univ. (United States)
Stuart B. Shaklan, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 10400:
Techniques and Instrumentation for Detection of Exoplanets VIII
Stuart Shaklan, Editor(s)

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