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Proceedings Paper

Optical delay for OHANA
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Paper Abstract

The OHANA interferometric array will be implemented by linking existing Mauna Kea telescopes with optical fiber. No new facility construction on Mauna Kea is required or planned for OHANA. Fibers will be run through existing cableways. The maximum potential baselines are approximately 800 meters in length. Interferometric operation with good UV coverage will require within the instrument variable optical delay approaching 400 meters. It will be necessary to provide this length of delay within a modest amount of existing laboratory space. An obvious approach is the use of multiple passes within a short delay line space. This poster investigates possible multi-pass implementations and related issues of efficiency, cost, wavefront quality and diffraction. The required optical delay can be provided at reasonable efficiency and moderate cost. The simpler optical delay for OHANA Phase II, already under construction, is described.

Paper Details

Date Published: 21 February 2003
PDF: 7 pages
Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); doi: 10.1117/12.459141
Show Author Affiliations
Stephen T. Ridgway, National Optical Astronomy Observatory (United States)
Guy S. Perrin, Observatoire de Paris-Meudon (France)
Julien Woillez, Observatoire de Paris-Meudon (France)
Jean Guerin, Observatoire de Paris-Meudon (France)
Olivier Lai, Canada-France-Hawaii Telescope Corp. (United States)

Published in SPIE Proceedings Vol. 4838:
Interferometry for Optical Astronomy II
Wesley A. Traub, Editor(s)

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