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Proceedings Paper

An infrared beam combiner for wavelength bootstrapping at the NPOI
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Paper Abstract

Since 1994, the Navy Precision Optical Interferometer (NPOI) has operated at visual wavelengths (450 to 850 nm). Its primary Classic backend is a pupil-plane combiner that disperses the light at a resolution R ≈ 50, uses avalanche photo-diodes as photon-counting detectors, and scans interference fringes by modulating the delay at 1 kHz. The newer NPOI image-plane combiner, VISION (Tennessee State University), which is similar to CHARA’s MIRC and is currently being upgraded, dispenses with delay modulation. We are now developing a third backend to expand into the near infrared. Its primary purpose will be to stabilize the NPOI for high-resolution observations by bootstrapping from the infrared to visual wavelengths.

Paper Details

Date Published: 9 July 2018
PDF: 5 pages
Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107010B (9 July 2018); doi: 10.1117/12.2312284
Show Author Affiliations
J. Thomas Armstrong, 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)
Ellyn K. Baines, U.S. Naval Research Lab. (United States)
Gerard T. van Belle, Lowell Observatory (United States)

Published in SPIE Proceedings Vol. 10701:
Optical and Infrared Interferometry and Imaging VI
Michelle J. Creech-Eakman; Peter G. Tuthill; Antoine Mérand, Editor(s)

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