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Proceedings Paper

Dual three-way infrared beam combiner at the CHARA Array
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Paper Abstract

Two identical three-way beam combiners have been installed at the CHARA Array. The new setup is an extension of the two-beam pupil plain combiner, which has been in use thus far. Using the new beam combiners we can now obtain phase closure data in H, K or J band on two sets of three telescopes. A new optical design has been implemented to image the six outputs of the combiners onto six separate pixels in the infrared detector array. The new optical arrangement provides reduced background and spatial filtering. The magnitude limit of this beam combiner has reached 7.8 in K magnitude mainly as a result of better image quality by the new infrared camera optics.

Paper Details

Date Published: 21 July 2010
PDF: 10 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77343A (21 July 2010); doi: 10.1117/12.857517
Show Author Affiliations
Judit Sturmann, Georgia State Univ. (United States)
Theo ten Brummelaar, Georgia State Univ. (United States)
Laszlo Sturmann, Georgia State Univ. (United States)
Harold A. McAlister, Georgia State Univ. (United States)

Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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