Atmospheric seeing and telescope vibrations

Details Atmospheric seeing and telescope vibrations Atmospheric seeing and telescope vibrations

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982lest.rept....7.&link_type=abstract

In its LEST: Large European Solar Telescope p 7-26 (SEE N82-32209 22-89)

Computer Science

Atmospheric Effects, Image Motion Compensation, Reflecting Telescopes, Structural Vibration, Domes (Structural Forms), Solar Instruments, Structural Design Criteria, Surface Roughness Effects, Temperature Control, Temperature Effects, Towers, Wind Shear

Scientific paper

The effects of upper atmosphere and ground level air turbulence and of structural vibration on telescope image quality are discussed. Turbulence due to thermal properties of the ground, topology, and the telescope tower and dome is considered. Correction for atmospheric seeing for high spatial resolution solar observations is restricted to a few 100 A bandwidth, so the need to minimize turbulence, e.g., by removing obstacles which deflect turbulence layers into the telescope line of sight, is stressed. The replacement of air by helium in the telescope tube is suggested as a means to overcome heating of optical components. Telescope vibrations can be reduced by having support structures with natural frequencies as high as possible.

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