Optical Delay for OHANA

Details Optical Delay for OHANA Optical Delay for OHANA

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4838.1310r&link_type=abstract

Interferometry for Optical Astronomy II. Edited by Wesley A. Traub . Proceedings of the SPIE, Volume 4838, pp. 1310-1316 (2003

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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