Computer Science
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982lest.rept..100.&link_type=abstract
In its LEST: Large European Solar Telescope p 100-106 (SEE N82-32209 22-89)
Computer Science
Mounting, Reflecting Telescopes, Solar Instruments, Systems Engineering, Hemispherical Shells, Image Motion Compensation, Optical Tracking, Pointing Control Systems, Wind (Meteorology)
Scientific paper
A mounting consisting of two revolving sections of a spherical shell is considered for the large European solar telescope. The lower section rotates about a vertical axis, and the upper section revolves on a circular bearing on the lower part. This concept allows for a well balanced and compact design. It may permit a domeless design, leading to substantial weight reduction pointing and tracking are easy, computerized, and robust. However, the telescope tube and its optical system rotate with respect to the plane of the direction of gravity. Tracking very close to the horizon and near zenith is precluded by acceleration strains on drives and bearings, although for solar observations this is not a serious drawback. The design is susceptible to wind induced vibrations. It is therefore of interest mainly in combination with an adequate active optical image stabilization scheme.
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