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Proceedings Paper

Design of a collimator support to provide flexure control on Cassegrain spectrographs
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Paper Abstract

The Echellette Spectrograph and Imager (ESI) is being built at UCO/Lick Observatory for the Cassegrain focus of the Keck II telescope. The collimator mirror is optimally constrained by a space-frame structure. It will be actively moved to provide the focus and flexure (tip and tilt) control for the instrument. Careful attention to space-frame geometry has simplified the mechanical design. Analytical and Finite Element Analysis (FEA) are presented to demonstrate how a simple but very stiff structure is used to provide support, flexure control, and focus.

Paper Details

Date Published: 9 July 1998
PDF: 9 pages
Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); doi: 10.1117/12.316826
Show Author Affiliations
Matthew V. Radovan, UCO/Lick Observatory (United States)
Bruce C. Bigelow, Observatories of the Carnegie Institute of Washington (United States)
Jerry E. Nelson, UCO/Lick Observatory (United States)
Andrew I. Sheinis, UCO/Lick Observatory (United States)


Published in SPIE Proceedings Vol. 3355:
Optical Astronomical Instrumentation
Sandro D'Odorico, Editor(s)

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