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Proceedings Paper

MMT optics support structure: performance for interferometric imaging
Author(s): E. Keith Hege; Matthew Cheselka
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Paper Abstract

A laser interferometer has been used to measure the relative optical pathlength variations from the focal plane to the six individual secondary telescopes of the Multiple Mirror Telescope (MMT). These pathlengths vary as functions of elevation due to variable gravitational loading, drive acceleration and velocity, temperature variations, and wind loading. Vibrations induced by wind loading and telescope drives, including building vibrations transmitted to the mount, cause high-frequency variations in the otherwise slowly varying optical pathlengths. This experiment was designed to evaluate the effects of these high-frequency perturbations on optical interferometry at various tracking rates, including those relevant to earth satellite observation. Effects are found which can strongly affect the contrast of interferograms.

Paper Details

Date Published: 1 August 1990
PDF: 12 pages
Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); doi: 10.1117/12.19331
Show Author Affiliations
E. Keith Hege, Steward Observatory/Univ. of Arizona (United States)
Matthew Cheselka, Steward Observatory/Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 1237:
Amplitude and Intensity Spatial Interferometry
James B. Breckinridge, Editor(s)

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