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Proceedings Paper

The Navy Precision Optical Interferometer: an update
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Paper Abstract

We describe the current status of the Navy Precision Optical Interferometer (NPOI), including developments since the last SPIE meeting. The NPOI group has added stations as far as 250m from the array center and added numerous infrastructure improvements. Science programs include stellar diameters and limb darkening, binary orbits, Be star disks, exoplanet host stars, and progress toward high-resolution stellar surface imaging. Technical and infrastructure projects include on-sky demonstrations of baseline bootstrapping with six array elements and of the VISION beam combiner, control system updates, integration of the long delay lines, and updated firmware for the Classic beam combiner. Our plans to add up to four 1.8 m telescopes are no longer viable, but we have recently acquired separate funding for adding three 1 m AO-equipped telescopes and an infrared beam combiner to the array.

Paper Details

Date Published: 19 August 2016
PDF: 8 pages
Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 990702 (19 August 2016); doi: 10.1117/12.2235077
Show Author Affiliations
J. Thomas Armstrong, U.S. Naval Research Lab. (United States)
Ellyn K. Baines, U.S. Naval Research Lab. (United States)
Henrique R. Schmitt, U.S. Naval Research Lab. (United States)
Sergio R. Restaino, U.S. Naval Research Lab. (United States)
James H. Clark, U.S. Naval Research Lab. (United States)
James A. Benson, U.S. Naval Observatory (United States)
Donald J. Hutter, U.S. Naval Observatory (United States)
Robert T. Zavala, U.S. Naval Observatory (United States)
Gerard T. van Belle, Lowell Observatory (United States)


Published in SPIE Proceedings Vol. 9907:
Optical and Infrared Interferometry and Imaging V
Fabien Malbet; Michelle J. Creech-Eakman; Peter G. Tuthill, Editor(s)

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