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Keck Interferometer autoaligner: algorithms and techniques

Hrynevych, Michael A. and Tsubota, Kevin and Smythe, Robert and Dahl, Wayne and Bell, Jim and Colavita, M. Mark and Gathright, John and Meggars, Forrest and Neyman, Christopher and Rudeen, Andy and van Belle, Gerard and Wizinowich, Peter (2004) Keck Interferometer autoaligner: algorithms and techniques. In: New Frontiers in Stellar Interferometry. Proceedings of SPIE. No.5491. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 1061-1067. ISBN 9780819454232.

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The Keck Interferometer includes an autoalignment system consisting of pop-up targets located at strategic locations along the beam trains of each arm of the instrument along with a sensor and control system. We briefly describe the hardware of the system and then proceed to a description of the two operational modes of the system. These are: 1) to provide an initial alignment of the coude paths in each arm, and 2) to recover coude alignments between changes of the static delay sled positions. For the initial alignment mode, we review the system performance requirements along with the software used for image acquisition and centroiding. For coudé alignment recovery, we describe beam-train surveys through the static delay (Long Delay Line) and criteria for a successful recovery of a coudé alignment. Finally, we describe the results of testing of the autoalignment system.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Bell, Jim0000-0002-2006-4074
van Belle, Gerard0000-0002-8552-158X
Wizinowich, Peter0000-0002-1646-442X
Additional Information:© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). The research described in this paper was carried out at the W. M. Keck Observatory, and at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. The Keck Interferometer is funded by the National Aeronautics and Space Administration as part of its Navigator Program. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
W. M. Keck FoundationUNSPECIFIED
Subject Keywords:Interferometry, alignment, automation, beamtrain, Keck Interferometer
Series Name:Proceedings of SPIE
Issue or Number:5491
Record Number:CaltechAUTHORS:20190221-110523603
Persistent URL:
Official Citation:Michael A. Hrynevych, Kevin Tsubota, Robert F. Smythe, Wayne Dahl, James Bell, M. Mark Colavita, John Gathright, Forrest Meggars, Christopher R. Neyman, Andy C. Rudeen, Gerard Theodore van Belle, and Peter L. Wizinowich "Keck Interferometer autoaligner: algorithms and techniques", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.552417;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93110
Deposited By: George Porter
Deposited On:26 Feb 2019 00:12
Last Modified:16 Nov 2021 16:55

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