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Proceedings Paper

A Mirror Mount For Cryogenic Environments
Author(s): Bijan Iraninejad; Daniel Vukobratovich; Ralph M Richard; Ramsey K Melugin
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Paper Abstract

The finite element method was used to study the effect of mount-induced aberrations on the optical surface of a lightweight double arch mirror subjected to cryogenic temperatures. The mount design was controlled by the requirements imposed on the optical surface quality and stress levels. The finite element analysis was used to define the feasible range of mount parameters and the selection of a design within the feasible region. The final design consisted of three spring-loaded Invar T-clamps that uniquely define the location of the mirror, three radially compliant parallel spring guides that remove the effect of radial contraction of structure in cryogenic temperatures, and a flexible baseplate that was used to reduce the effect of temperature-induced baseplate tilt errors. The experimental results from the applica-tion of this system to an existing 20-inch fused silica double arch mirror are shown, and possible improvements in system performance are discussed.

Paper Details

Date Published: 5 January 1984
PDF: 6 pages
Proc. SPIE 0450, Structural Mechanics of Optical Systems I, (5 January 1984); doi: 10.1117/12.939264
Show Author Affiliations
Bijan Iraninejad, University of Arizona (United States)
Daniel Vukobratovich, University of Arizona (United States)
Ralph M Richard, University of Arizona (United States)
Ramsey K Melugin, NASA Ames Research Center (United States)

Published in SPIE Proceedings Vol. 0450:
Structural Mechanics of Optical Systems I
Lester M. Cohen, Editor(s)

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