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The low-order wavefront sensor for the PICTURE-C mission

Shaklan, Stuart and Mendillo, Christopher B. and Brown, Joshua and Martel, Jason and Howe, Glenn A. and Hewasawam, Kuravi and Finn, Susanna C. and Cook, Timothy A. and Chakrabarti, Supriya and Douglas, Ewan S. and Mawet, Dimitri and Guyon, Olivier and Singh, Garima and Lozi, Julien and Cahoy, Kerri L. and Marinan, Anne D. (2015) The low-order wavefront sensor for the PICTURE-C mission. In: Techniques and Instrumentation for Detection of Exoplanets VII. Proceedings of SPIE. No.9605. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 960519. ISBN 978-1-62841-771-5.

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The PICTURE-C mission will fly a 60 cm off-axis unobscured telescope and two high-contrast coronagraphs in successive high-altitude balloon flights with the goal of directly imaging and spectrally characterizing visible scattered light from exozodiacal dust in the interior 1-10 AU of nearby exoplanetary systems. The first flight in 2017 will use a 10^(-4) visible nulling coronagraph (previously flown on the PICTURE sounding rocket) and the second flight in 2019 will use a 10^(-7) vector vortex coronagraph. A low-order wavefront corrector (LOWC) will be used in both flights to remove time-varying aberrations from the coronagraph wavefront. The LOWC actuator is a 76-channel high-stroke deformable mirror packaged on top of a tip-tilt stage. This paper will detail the selection of a complementary high-speed, low-order wavefront sensor (LOWFS) for the mission. The relative performance and feasibility of several LOWFS designs will be compared including the Shack-Hartmann, Lyot LOWFS, and the curvature sensor. To test the different sensors, a model of the time-varying wavefront is constructed using measured pointing data and inertial dynamics models to simulate optical alignment perturbations and surface deformation in the balloon environment.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Mawet, Dimitri0000-0002-8895-4735
Guyon, Olivier0000-0002-1097-9908
Lozi, Julien0000-0002-3047-1845
Additional Information:© 2015 SPIE. This work was funded under NASA grant NNX15AG23G S01. Thanks to Jim Lanzi and David Stuchlik at WFF for providing the WASP test flight 2 data.
Funding AgencyGrant Number
Subject Keywords:exoplanets, exozodiacal dust, debris disks, balloon, direct imaging, fine pointing, wavefront control, high-contrast imaging
Series Name:Proceedings of SPIE
Issue or Number:9605
Record Number:CaltechAUTHORS:20160104-133428051
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Official Citation:Christopher B. Mendillo ; Joshua Brown ; Jason Martel ; Glenn A. Howe ; Kuravi Hewasawam ; Susanna C. Finn ; Timothy A. Cook ; Supriya Chakrabarti ; Ewan S. Douglas ; Dimitri Mawet ; Olivier Guyon ; Garima Singh ; Julien Lozi ; Kerri L. Cahoy and Anne D. Marinan " The low-order wavefront sensor for the PICTURE-C mission ", Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 960519 (September 16, 2015); doi:10.1117/12.2188238;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63336
Deposited By: Ruth Sustaita
Deposited On:04 Jan 2016 21:57
Last Modified:09 Mar 2020 13:19

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