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James Webb Space Telescope optical simulation testbed V: wide-field phase retrieval assessment

Laginja, Iva and Brady, Greg and Soummer, Rémi and Egron, Sylvain and Moriarty, Christopher and Lajoie, Charles-Philippe and Bonnefois, Aurélie and Michau, Vincent and Choquet, Élodie and Ferrari, Marc and Leboulleux, Lucie and Levecq, Olivier and N'Diaye, Mamadou and Perrin, Marshall D. and Petrone, Peter and Pueyo, Laurent and Sivaramakrishnan, Anand (2018) James Webb Space Telescope optical simulation testbed V: wide-field phase retrieval assessment. In: Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave. Proceedings of SPIE. No.10698. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 106983N. ISBN 9781510619494.

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The James Webb Space Telescope (JWST) Optical Simulation Testbed (JOST) is a hardware simulator for wavefront sensing and control designed to produce JWST-like images. A model of the JWST three mirror anastigmat is realized with three lenses in the form of a Cooke triplet, which provides JWST-like optical quality over a field equivalent to a NIRCam module. An Iris AO hexagonally segmented mirror stands in for the JWST primary. This setup successfully produces images extremely similar to expected JWST in- ight point spread functions (PSFs), and NIRCam images from cryotesting, in terms of the PSF morphology and sampling relative to the diffraction limit. The segmentation of the primary mirror into subapertures introduces complexity into wavefront sensing and control (WFSandC) of large space based telescopes like JWST. JOST provides a platform for independent analysis of WFSandC scenarios for both commissioning and maintenance activities on such observatories. We present an update of the current status of the testbed including both single field and wide-field alignment results. We assess the optical quality of JOST over a wide field of view to inform the future implementation of different wavefront sensing algorithms including the currently implemented Linearized Algorithm for Phase Diversity (LAPD). JOST complements other work at the Makidon Laboratory at the Space Telescope Science Institute, including the High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed, that investigates coronagraphy for segmented aperture telescopes. Beyond JWST we intend to use JOST for WFSandC studies for future large segmented space telescopes such as LUVOIR.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Soummer, Rémi0000-0003-2753-2819
Choquet, Élodie0000-0002-9173-0740
N'Diaye, Mamadou0000-0002-1721-3294
Perrin, Marshall D.0000-0002-3191-8151
Pueyo, Laurent0000-0003-3818-408X
Additional Information:© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). This work is supported by the JWST Telescope Scientist Investigation NASA Grant NNX07AR82G (PI: C. Matt Mountain). This works also builds in part on work supported by NASA Grants NNX12AG05G and NNX14AD33G issued through the Astrophysics Research and Analysis (APRA) program for the development of the HiCAT testbed (PI: R. Soummer). This research made use of POPPY, an open-source optical propagation Python package originally developed for the James Webb Space Telescope project. This research made use of Astropy, a community-developed core Python package for Astronomy.
Funding AgencyGrant Number
Subject Keywords:Segmented telescope, cophasing, exoplanet, high-contrast imaging, error budget, wavefront sensing and control
Series Name:Proceedings of SPIE
Issue or Number:10698
Record Number:CaltechAUTHORS:20181207-083716257
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Official Citation:Iva Laginja, Greg Brady, Rémi Soummer, Sylvain Egron, Christopher Moriarty, Charles-Philippe Lajoie, Aurélie Bonnefois, Vincent Michau, Élodie Choquet, Marc Ferrari, Lucie Leboulleux, Olivier Levecq, Mamadou N'Diaye, Marshall D. Perrin, Peter Petrone, Laurent Pueyo, Anand Sivaramakrishnan, "James Webb Space Telescope optical simulation testbed V: wide-field phase retrieval assessment," Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106983N (21 August 2018); doi: 10.1117/12.2313892
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91553
Deposited By: George Porter
Deposited On:07 Dec 2018 22:53
Last Modified:16 Nov 2021 03:42

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