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Shape Correction of Thin Mirrors

Patterson, Keith and Pellegrino, Sergio (2011) Shape Correction of Thin Mirrors. In: 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2011-1827. ISBN 9781600869518. https://resolver.caltech.edu/CaltechAUTHORS:20190930-110457762

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Abstract

Future large space observatories will require large apertures to provide better resolution and greater light gathering power; thin mirror technologies provide one possible route for addressing this need. This paper presents a study of a 10 m diameter sparse aperture based on a collection of thin, active mirror segments with identical initial shapes. A preliminary design for a 1 m diameter mirror segment is proposed and an investigation into the performance of this design is carried out utilizing finite element modeling tools. The results indicate that it is possible to adapt the generic segment shapes to fit the local mirror shape, and achieve near diffraction-limited performance through the use of lightweight, surface-parallel actuators. These actuators may also be used for thermal compensation. Additionally, a design for a scaled 10 cm diameter prototype mirror to test and validate the envisioned scheme is presented.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2011-1827DOIArticle
ORCID:
AuthorORCID
Pellegrino, Sergio0000-0001-9373-3278
Additional Information:© 2011 by Keith Patterson and Sergio Pellegrino. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. We thank Jim Breckinridge for helpful discussions of telescope design and Chiara Daraio, Eleftherios Gdoutos, and Andrew Shapiro for help and advice regarding the fabrication of a prototype. Financial support from the Keck Institute of Space Studies at Caltech is gratefully acknowledged.
Group:GALCIT, Keck Institute for Space Studies
Funders:
Funding AgencyGrant Number
Keck Institute for Space Studies (KISS)UNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2011-1827
Record Number:CaltechAUTHORS:20190930-110457762
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190930-110457762
Official Citation: Shape Correction of Thin Mirrors. Keith Patterson and Sergio Pellegrino. 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. April 2011. https://doi.org/10.2514/6.2011-1827
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98931
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:07 Oct 2019 14:29
Last Modified:07 Oct 2019 14:31

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