Share Email Print
cover

Proceedings Paper

Starshade design driven by stray light from edge scatter
Author(s): Suzanne Casement; Martin Flannery; Tiffany Glassman; Amy Lo
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The use of an external occulter, or starshade, has been proposed as one method for the direct detection and spectral characterization of terrestrial planets around other stars, a key goal identified in ASTRO2010. Because of the observational geometry, one of the concerns is stray light from the edge of the starshade that is scattered into the line of sight of the telescope. We have developed a stray light model using physical properties of a realizable starshade edge geometry and material to calculate the resulting stray light. The background signal due to stray light has been calculated for the two telescope architectures adopted for study by the Exoplanet Exploration Program Analysis Group (ExoPAG), a 4 m monolithic and an 8 m segmented mirror design. Using these results, we have developed a set of design requirements and structure features that will result in a buildable system with stray light levels that meet the overall system sensitivity requirements.

Paper Details

Date Published: 21 September 2012
PDF: 11 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84424H (21 September 2012); doi: 10.1117/12.926933
Show Author Affiliations
Suzanne Casement, Northrop Grumman Aerospace Systems (United States)
Martin Flannery, Northrop Grumman Aerospace Systems (United States)
Tiffany Glassman, Northrop Grumman Aerospace Systems (United States)
Amy Lo, Northrop Grumman Aerospace Systems (United States)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann, Editor(s)

© SPIE. Terms of Use
Back to Top