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20 October 2004 Alignment of vacuum feed stations on the Navy Prototype Optical Interferometer
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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.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James H. Clark, James Murphy, Long Ha, Joshua P. Walton, James Howard, J. Thomas Armstrong, G. Charmaine Gilbreath, Robert B. Hindsley, and Thomas A. Pauls "Alignment of vacuum feed stations on the Navy Prototype Optical Interferometer", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.550867; https://doi.org/10.1117/12.550867
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