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Proceedings Paper

Combined fast steering and alignment mirror for space-based interferometers
Author(s): Lawrence M. Germann; Gary H. Blackwood; T. Iskenderian; Steven M. Gunter; Dale A. Lawrence
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Paper Abstract

This advanced steering mirror design combines large angular travel with high bandwidth dynamic response and high accuracy. The benefits for space-based interferometry include more commonality between mechanisms, reduced spares inventory, lower procurement costs, and reduced risk. These devices are used for alignment and fine-steering functions in the coherent combination of light from several collectors to independent combiner optics. Since this design can be used for alignment and fine-steering functions, a reduced number of component designs are required for interferometric missions. In some cases functions can be combined into a reduced number of mechanisms. The steering mirror design achieves this with a simplified electromagnetic actuator configuration having no iron other than the magnets in the magnetic path. Other benefits of the simplified design include: a compact steering mirror envelope that is only slightly larger than the mirror itself, simplified fabrication and assembly, and reduced power consumption. This paper includes the application, requirements and configuration along with performance analyses and verification test data. Analytical models for force, power, thermal, magnetic, dynamic and mass properties as well as various figures of merit are described.

Paper Details

Date Published: 12 October 1996
PDF: 23 pages
Proc. SPIE 2807, Space Telescopes and Instruments IV, (12 October 1996); doi: 10.1117/12.255116
Show Author Affiliations
Lawrence M. Germann, Left Hand Design Corp. (United States)
Gary H. Blackwood, Jet Propulsion Lab. (United States)
T. Iskenderian, Jet Propulsion Lab. (United States)
Steven M. Gunter, Jet Propulsion Lab. (United States)
Dale A. Lawrence, Univ. of Colorado (United States)

Published in SPIE Proceedings Vol. 2807:
Space Telescopes and Instruments IV
Pierre Y. Bely; James B. Breckinridge, Editor(s)

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