Catching the rays: modeling the stray light background of a starshade

Stefan R. Martin; Scott Ellis; Stuart Shaklan; P. Douglas Lisman; Manan Arya; Matthew Stegman

doi:10.1117/12.2597428

1 September 2021 Catching the rays: modeling the stray light background of a starshade

Stefan R. Martin, Scott Ellis, Stuart Shaklan, P. Douglas Lisman, Manan Arya, Matthew Stegman

Proceedings Volume 11823, Techniques and Instrumentation for Detection of Exoplanets X; 1182313 (2021) https://doi.org/10.1117/12.2597428
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Diffraction and reflection from the optical edges is the dominant source of stray light from a starshade. However, recent progress in optical edge design has led to much reduced predictions in this source. Secondary sources now also play a role; these sources arise from two or more reflections from the starshade structure. These multiple reflections allow light to reach the telescope from parts of the structure that are shaded from direct sunlight. Here we analyze the secondary sources for the starshade model developed as part of the S5 technology development and show the effects of optical edge mechanical design variants and mitigations.

Conference Presentation

Citation Download Citation

Stefan R. Martin, Scott Ellis, Stuart Shaklan, P. Douglas Lisman, Manan Arya, and Matthew Stegman "Catching the rays: modeling the stray light background of a starshade", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 1182313 (1 September 2021); https://doi.org/10.1117/12.2597428

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