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Proceedings Paper

Near-infrared guiding and tip-tilt correction for the UC Berkeley Infrared Spatial Interferometer
Author(s): Everett A. Lipman; Manfred Bester; William C. Danchi; Charles H. Townes
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Paper Abstract

The UC Berkeley Infrared Spatial Interferometer (ISI) is a heterodyne stellar interferometer which operates in the mid-infrared between 9 and 12 microns. This wavelength range makes the ISI particularly well-suited to high resolution study of late-type stars and other objects surrounded by relatively cool dust, the emission from which peaks in the mid-infrared. Unfortunately, this same dust tends to reduce the amount of visible light available from the sources, making many interesting infrared objects too faint for the original telescope guiding system, which used a silicon CCD camera. This system has been replaced by a guiding and tip-tilt correction system based on an InSb IR camera and a fast, controllable tilting mount for one of the mirrors in the signal path. The new system has improved the quality of ISI fringe visibility data on bright sources and allowed the study of previously inaccessible objects.

Paper Details

Date Published: 24 July 1998
PDF: 8 pages
Proc. SPIE 3350, Astronomical Interferometry, (24 July 1998); doi: 10.1117/12.317160
Show Author Affiliations
Everett A. Lipman, Univ. of California/Berkeley (United States)
Manfred Bester, Univ. of California/Berkeley (United States)
William C. Danchi, Univ. of California/Berkeley (United States)
Charles H. Townes, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 3350:
Astronomical Interferometry
Robert D. Reasenberg, Editor(s)

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