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Proceedings Paper

Design, fabrication and testing of active carbon shell mirrors for space telescope applications
Author(s): John Steeves; Marie Laslandes; Sergio Pellegrino; David Redding; Samuel Case Bradford; James Kent Wallace; Troy Barbee
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Paper Abstract

A novel active mirror concept based on carbon fiber reinforced polymer (CFRP) materials is presented. A nanolaminate facesheet, active piezoelectric layer and printed electronics are implemented in order to provide the reflective surface, actuation capabilities and electrical wiring for the mirror. Mirrors of this design are extremely thin (500-850 µm), lightweight (~ 2 kg/m2) and have large actuation capabilities (~ 100 µm peak- to-valley deformation per channel). Replication techniques along with simple bonding/transferring processes are implemented eliminating the need for grinding and polishing steps. An outline of the overall design, component materials and fabrication processes is presented. A method to size the active layer for a given mirror design, along with simulation predictions on the correction capabilities of the mirror are also outlined. A custom metrology system used to capture the highly deformable nature of the mirrors is demonstrated along with preliminary prototype measurements.

Paper Details

Date Published: 28 July 2014
PDF: 13 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915105 (28 July 2014); doi: 10.1117/12.2056560
Show Author Affiliations
John Steeves, California Institute of Technology (United States)
Marie Laslandes, California Institute of Technology (United States)
Sergio Pellegrino, California Institute of Technology (United States)
David Redding, Jet Propulsion Lab. (United States)
Samuel Case Bradford, Jet Propulsion Lab. (United States)
James Kent Wallace, Jet Propulsion Lab. (United States)
Troy Barbee, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)

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