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Proceedings Paper

Design study of the GNIRS bracket structure
Author(s): Myung K. Cho; Cheng Li; Woon-Yin Wong; Randy W. Cuberly; Il-Kwon Moon
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Paper Abstract

The internal support structure of the Gemini Near IR Spectrograph (GNIRS) comprises a series of substructures which are interconnected to support the optical components and their mechanisms.A very stable support structure is required in the GNIRS to exploit the high image quality rings; this type of structural did not provide sufficient stiffness. This concept was replaced by a novel type of structure employing lightweight cylindrical models, with each module produced by numerically controlled machining from a solid. Finite element analysis is combined with 3D layout techniques to develop an optimized structural configuration for each module. A parametric process was performed for the design optimization to produce the highest fundamental frequency for a given weight, as well as to deal with the normal concerns about global deformation and stress.

Paper Details

Date Published: 21 August 1998
PDF: 12 pages
Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317237
Show Author Affiliations
Myung K. Cho, Optical Sciences Ctr./Univ. of Arizona (United States)
Cheng Li, National Optical Astronomy Observatories (United States)
Woon-Yin Wong, National Optical Astronomy Observatories (United States)
Randy W. Cuberly, National Optical Astronomy Observatories (United States)
Il-Kwon Moon, Univ. of Arizona (South Korea)


Published in SPIE Proceedings Vol. 3354:
Infrared Astronomical Instrumentation
Albert M. Fowler, Editor(s)

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