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14 May 2019 Polarization aberration analysis for the PICTURE-C exoplanetary coronagraph
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The Planetary Imaging Concept Testbed Using a Recoverable Experiment - Coronagraph (PICTURE-C) mission will directly image debris disks and exozodiacal dust around nearby stars from a high-altitude balloon using a vector vortex coronagraph. One of the many starlight leakage sources that can degrade the performance of the coronagraph is polarization aberration induced by the reflective optical coatings. A polarization ray trace of the PICTURE-C telescope and coronagraph is combined with a physical optics wavefront propagation simulation to quantify the expected amount of coronagraph leakage due to polarization aberration. The simulations show the leakage is below the budgeted contrast of 1  ×  10  −  8.
© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 2329-4124/2019/$25.00 © 2019 SPIE
Christopher B. Mendillo, Glenn A. Howe, Kuravi Hewawasam, Jason Martel, Timothy A. Cook, and Supriya Chakrabarti "Polarization aberration analysis for the PICTURE-C exoplanetary coronagraph," Journal of Astronomical Telescopes, Instruments, and Systems 5(2), 025003 (14 May 2019).
Received: 23 August 2018; Accepted: 8 April 2019; Published: 14 May 2019

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