1 August 1990 MMT optics support structure: performance for interferometric imaging
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
E. Keith Hege, E. Keith Hege, Matthew Cheselka, Matthew Cheselka, } "MMT optics support structure: performance for interferometric imaging", Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); doi: 10.1117/12.19331; https://doi.org/10.1117/12.19331

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