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Proceedings Paper

Alignment of vacuum feed stations on the Navy Prototype Optical Interferometer
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Paper Abstract

At the Navy Prototype Optical Interferometer (NPOI) we have developed a two-stage method for preparation and installation of the optical feed relay stations (elevators). This method reduces contamination, increases consistency, and allows greater management in testing and upgrades. In stage one, we prepare a pre-alignment facility in a laboratory. Using this facility we accurately position the feed stations, internal optics and detector optics relative to the NPOI array line-of-sight. The feed station is cleaned, assembled, internally aligned, tested and placed in its vacuum canister. It is stored under vacuum until transported to the array. In stage two, we align the station on the array by global five-axis adjustments of the vacuum canister. No further independent internal alignments are necessary. The canister is continuously under vacuum during global alignments. We describe the methodology and techniques for installing the optical feed stations.

Paper Details

Date Published: 20 October 2004
PDF: 6 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.550867
Show Author Affiliations
James H. Clark III, Naval Research Lab. (United States)
James Murphy, Interferometrics, Inc. (United States)
Long Ha, Universities Space Research Association (United States)
Joshua P. Walton, Universities Space Research Association (United States)
James Howard, Naval Research Lab. (United States)
J. Thomas Armstrong, Naval Research Lab. (United States)
G. Charmaine Gilbreath, Naval Research Lab. (United States)
Robert B. Hindsley, Naval Research Lab. (United States)
Thomas A. Pauls, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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