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Proceedings Paper

APERTURE, a precise extremely-large reflective telescope using re-configurable element: a progress report
Author(s): R. Coppejans; M. P. Ulmer; D. B. Buchholz; X. Wang; J. Cao; V. L. Coverstone; T. B. Baturalp; K. S. Condron; A. E. O'Donnell; B. E. Harpt; W. H. Reinhardt; M. E. Johnson
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Paper Abstract

One of the pressing needs for the UV-Vis is an affordable design that allows larger mirrors than the JWST primary. In this publication we report the results of the first year of a NASA Innovative Advanced Concepts Phase II study. Our project is called A Precise Extremely large Reflective Telescope Using Reconfigurable Elements (APERTURE). The concept is to deploy a continuous membrane-like mirror. The mirror figure will be corrected after deployment, causing the figure error to decrease below λ/20. While the basic concept is not new, our innovation lies in a different approach to correcting the residual figure errors from the classical piezoelectricpatch technology. Instead, our concept is based on a contiguous coating of a magnetic smart material (MSM). After deployment, a magnetic write head will move along the non-reflecting side of the mirror. The magnetic field will produce a stress in the MSM which then corrects the mirror shape. This publication summarizes the results of minimizing the MSM deposition stress as well as the size and stability of the deformation, which is maintained by a magnetically hard material.

Paper Details

Date Published: 5 September 2017
PDF: 12 pages
Proc. SPIE 10398, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII, 103980N (5 September 2017); doi: 10.1117/12.2274278
Show Author Affiliations
R. Coppejans, Northwestern Univ. (United States)
M. P. Ulmer, Northwestern Univ. (United States)
D. B. Buchholz, Northwestern Univ. (United States)
X. Wang, Northwestern Univ. (United States)
Wuhan Univ. of Technology (China)
J. Cao, Northwestern Univ. (United States)
V. L. Coverstone, Texas Tech Univ. (United States)
T. B. Baturalp, Texas Tech Univ. (United States)
K. S. Condron, Northwestern Univ. (United States)
A. E. O'Donnell, Northwestern Univ. (United States)
B. E. Harpt, Massachusetts Institute of Technology (United States)
W. H. Reinhardt, Northwestern Univ. (United States)
M. E. Johnson, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 10398:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII
Howard A. MacEwen; James B. Breckinridge, Editor(s)

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