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Proceedings Paper

Telescope phasing by simulated annealing
Author(s): Erez N. Ribak; Joan Adler; Steven G. Lipson
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Paper Abstract

We have used a laser interferometer 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 func- Lions 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. We find effects which can strongly affect the contrast of interferograms.

Paper Details

Date Published: 1 August 1990
PDF: 11 pages
Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); doi: 10.1117/12.19329
Show Author Affiliations
Erez N. Ribak, Technion--Israel Institute of Technology (Israel)
Joan Adler, Technion--Israel Institute of Technology (Israel)
Steven G. Lipson, Technion--Israel Institute of Technology (Israel)

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

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