Telescope phasing by simulated annealing

Erez N. Ribak; Joan Adler; Steven G. Lipson

doi:10.1117/12.19329

1 August 1990 Telescope phasing by simulated annealing

Erez N. Ribak, Joan Adler, Steven G. Lipson

Proceedings Volume 1237, Amplitude and Intensity Spatial Interferometry; (1990) https://doi.org/10.1117/12.19329
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

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.

Citation Download Citation

Erez N. Ribak, Joan Adler, and Steven G. Lipson "Telescope phasing by simulated annealing", Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); https://doi.org/10.1117/12.19329

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