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Decoupling the image-plane and low-order wavefront sensors for the PICTURE-C coronagraph
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Paper Abstract

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. PICTURE-C employs both image-plane wavefront sensing for high-order wave- front control and a reflective Lyot-stop sensor for low-order wavefront control. Since both of these systems lie downstream from the coronagraph's deformable mirror, and since both must run simultaneously, they must be calibrated as to not interfere with each other. The deformable mirror probe patterns required for image-plane sensing appear as wavefront errors to the low-order sensor. This paper presents simulations of low and high-order wavefront sensing for PICTURE-C and calibration techniques for decoupling the two sensors.

Paper Details

Date Published: 9 September 2019
PDF: 7 pages
Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171R (9 September 2019); doi: 10.1117/12.2529724
Show Author Affiliations
Christopher B. Mendillo, Univ. of Massachusetts Lowell (United States)
Kuravi Hewawasam, Univ. of Massachusetts Lowell (United States)
Glenn A. Howe, Univ. of Massachusetts Lowell (United States)
Jason Martel, Univ. of Massachusetts Lowell (United States)
Timothy A. Cook, Univ. of Massachusetts Lowell (United States)
Supriya Chakrabarti, Univ. of Massachusetts Lowell (United States)


Published in SPIE Proceedings Vol. 11117:
Techniques and Instrumentation for Detection of Exoplanets IX
Stuart B. Shaklan, Editor(s)

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