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Proceedings Paper

Extremely Lightweight Space Telescope Mirrors With Integrated Active Figure Control
Author(s): Pierre Y. Bely; John F. Bolton
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Paper Abstract

A concept for an extremely lightweight primary mirror for a large space telescope is proposed. The mirror uses a sandwich structure composed of aluminum faceplates with an aluminum foam core. Modal analysis indicates that a fundamental frequency of 100 Hz can be obtained for a 6 meter diameter mirror with a tapered back and having a total mass of about 3500 kg. An array of thermal actuators embedded in the mirror corrects for figure errors. Such an active thermal figure control system does not have a quick response, but is well suited to space applications where disturbances have relatively long time constants. The advantage of thermal actuators is very high reliability, a primary concern in any space system requiring a large number of actuators.

Paper Details

Date Published: 20 September 1989
PDF: 9 pages
Proc. SPIE 1114, Active Telescope Systems, (20 September 1989); doi: 10.1117/12.960841
Show Author Affiliations
Pierre Y. Bely, Space Telescope Science Institute (United States)
John F. Bolton, Goddard Space Flight Center (United States)

Published in SPIE Proceedings Vol. 1114:
Active Telescope Systems
Francois J. Roddier, Editor(s)

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