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Proceedings Paper

A method for modifying occulter shapes
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Paper Abstract

An occulter is an instrument designed to suppress starlight by diffraction from its edges; most are designed to be circular, with a set of identical "petals" running around the outside. Proposed space-based occulters are lightweight, deployed screens tens of meters in diameter with challenging accuracy requirements. We describe a general method for modifying the shape of an occulter to accommodate engineering considerations and show how to calculate the resulting wavefront. This method can be used to place hinges and tensioning elements between petals, to reduce tolerancing requirements by allowing gaps between petals to be moved elsewhere, and to potentially reduce the number of petals required on an occulter.

Paper Details

Date Published: 19 August 2009
PDF: 8 pages
Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 744007 (19 August 2009); doi: 10.1117/12.826183
Show Author Affiliations
Eric Cady, Princeton Univ. (United States)
Stuart B. Shaklan, Jet Propulsion Lab. (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)
David Spergel, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 7440:
Techniques and Instrumentation for Detection of Exoplanets IV
Stuart B. Shaklan, Editor(s)

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