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

Christopher B. Mendillo; Kuravi Hewawasam; Glenn A. Howe; Jason Martel; Timothy A. Cook; Supriya Chakrabarti

doi:10.1117/12.2529724

9 September 2019 Decoupling the image-plane and low-order wavefront sensors for the PICTURE-C coronagraph

Christopher B. Mendillo, Kuravi Hewawasam, Glenn A. Howe, Jason Martel, Timothy A. Cook, Supriya Chakrabarti

Proceedings Volume 11117, Techniques and Instrumentation for Detection of Exoplanets IX; 111171R (2019) https://doi.org/10.1117/12.2529724
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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.

Citation Download Citation

Christopher B. Mendillo, Kuravi Hewawasam, Glenn A. Howe, Jason Martel, Timothy A. Cook, and Supriya Chakrabarti "Decoupling the image-plane and low-order wavefront sensors for the PICTURE-C coronagraph", Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171R (9 September 2019); https://doi.org/10.1117/12.2529724

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