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

Matthew V. Radovan; Bruce C. Bigelow; Jerry E. Nelson; Andrew I. Sheinis

doi:10.1117/12.316826

9 July 1998 Design of a collimator support to provide flexure control on Cassegrain spectrographs

Matthew V. Radovan, Bruce C. Bigelow, Jerry E. Nelson, Andrew I. Sheinis

Proceedings Volume 3355, Optical Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.316826
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

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.

Citation Download Citation

Matthew V. Radovan, Bruce C. Bigelow, Jerry E. Nelson, and Andrew I. Sheinis "Design of a collimator support to provide flexure control on Cassegrain spectrographs", Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); https://doi.org/10.1117/12.316826

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