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Phase-retrieval-based wavefront metrology for high-contrast coronography: 2. Reconstructions through a shaped pupil apodizer

Brady, Gregory R. and Petrone, Peter and Laginja, Iva and Brooks, Keira and Zhang, Manxuan (Rebecca) and N'Diaye, Mamadou and Moriarty, Christopher and Hagopian, John and Soummer, Rémi (2019) Phase-retrieval-based wavefront metrology for high-contrast coronography: 2. Reconstructions through a shaped pupil apodizer. In: Techniques and Instrumentation for Detection of Exoplanets IX. Proceedings of SPIE. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 1111712. ISBN 9781510629271. https://resolver.caltech.edu/CaltechAUTHORS:20190913-074142774

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Abstract

We discuss the use of parametric phase-diverse phase retrieval to characterize and optimize the transmitted wavefront of a high-contrast apodized pupil coronagraph with and without an apodizer. We apply our method to correct the transmitted wavefront of the HiCAT (High contrast imager for Complex Aperture Telescopes) coronagraphic testbed. This correction requires a series of calibration steps, which we describe. The correction improves the system wavefront from 16 nm RMS to 3.0 nm RMS for the case where a uniform circular aperture is in place. We further measure the wavefront with the apodizer in place to be 11.7 nm RMS. Improvement to the apodized pupil phase retrieval process is necessary before a correction based on this measurement can be applied.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2530482DOIArticle
ORCID:
AuthorORCID
N'Diaye, Mamadou0000-0002-1721-3294
Soummer, Rémi0000-0003-2753-2819
Additional Information:© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). This work is supported by the National Aeronautics and Space Administration under Grants NNX12AG05G, NNX14AD33G issued through the Astrophysics Research and Analysis (APRA) program (PI: R. Soummer) the JWST Telescope Scientist Investigation, NASA Grant NNX07AR82G (PI: C. Matt Mountain) and the STScI Directors Discretionary Research Funds.
Funders:
Funding AgencyGrant Number
NASANNX12AG05G
NASANNX14AD33G
NASANNX07AR82G
Space Telescope Science InstituteUNSPECIFIED
Subject Keywords:Phase retrieval, coronagraph, wavefront-sensing, deformable mirror, high-contrast imaging
Series Name:Proceedings of SPIE
Record Number:CaltechAUTHORS:20190913-074142774
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190913-074142774
Official Citation:Gregory R. Brady, Peter Petrone III, Iva Laginja, Keira Brooks, Manxuan (Rebecca) Zhang, Mamadou N'Diaye, Christopher Moriarty, John Hagopian, and Rémi Soummer "Phase-retrieval-based wavefront metrology for high-contrast coronography: 2. Reconstructions through a shaped pupil apodizer", Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 1111712 (9 September 2019); https://doi.org/10.1117/12.2530482
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98627
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Sep 2019 14:49
Last Modified:09 Oct 2019 23:27

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