Achromatizing scalar vortex coronagraphs with radial phase mask dimples

Niyati Desai; Arielle Bertrou-Cantou; Garreth Ruane; Jorge Llop-Sayson; A. J. Eldorado Riggs; Eugene Serabyn; Dimitri Mawet

doi:10.1117/12.2677224

5 October 2023 Achromatizing scalar vortex coronagraphs with radial phase mask dimples

Niyati Desai, Arielle Bertrou-Cantou, Garreth Ruane, Jorge Llop-Sayson, A. J. Eldorado Riggs, Eugene Serabyn, Dimitri Mawet

Author Affiliations +

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126802B (2023) https://doi.org/10.1117/12.2677224
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

The Habitable Worlds Observatory mission will require coronagraphs capable of achieving contrasts of 1e-10 to detect exo-Earths. The choice of coronagraph depends on finding a solution that is achromatic within a 20% bandwidth, insensitive to low order aberrations and polarization independent. We present two scalar vortex phase mask designs which employ a Roddier phase dimple and a dual zone phase dimple to improve the achromatic performance by addressing the chromatic stellar leakage not handled by the vortex. We show that using these dimples, it is possible to substantially improve the broadband contrast performance of existing scalar vortex phase masks.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Niyati Desai, Arielle Bertrou-Cantou, Garreth Ruane, Jorge Llop-Sayson, A. J. Eldorado Riggs, Eugene Serabyn, and Dimitri Mawet "Achromatizing scalar vortex coronagraphs with radial phase mask dimples", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126802B (5 October 2023); https://doi.org/10.1117/12.2677224

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