1 September 2017 Optical demonstration of a starshade at flight Fresnel numbers
Author Affiliations +
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.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yunjong Kim, Yunjong Kim, Anthony Harness, Anthony Harness, Dan Sirbu, Dan Sirbu, Mengya Hu, Mengya Hu, Mike Galvin, Mike Galvin, N. Jeremy Kasdin, N. Jeremy Kasdin, Robert J. Vanderbei, Robert J. Vanderbei, Stuart B. Shaklan, Stuart B. Shaklan, } "Optical demonstration of a starshade at flight Fresnel numbers ", Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104001A (1 September 2017); doi: 10.1117/12.2273287; https://doi.org/10.1117/12.2273287
PROCEEDINGS
12 PAGES + PRESENTATION

SHARE
Back to Top