Computer Science – Performance
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993acasn..34..165x&link_type=abstract
Acta Astronomica Sinica (ISSN 0001-5245), vol. 34, no. 2, p. 172-180
Computer Science
Performance
Atmospheric Correction, Atmospheric Diffusion, Focusing, Lens Design, Optical Measuring Instruments, Telescopes, Ellipsoids, Ellipticity, Lenses, Mirrors, Prisms
Scientific paper
This paper introduces three types of primary correctors for the Chinese 2.16m telescope. Each corrector has a 2-degree field and can be used to compensate the atmospheric dispersion of 6 sec. The primary mirror of the telescope is a 2.16m hyperboloid with ellipicity 1.0951347 and f-ratio of 3. The first corrector consists of 4 elements, all of their surfaces being spherical. The second corrector also consists of 4 elements, one of which is an ellipsoid. The third one consists of three elements, for which two kinds of structure parameters and the relevant results are given. Lens-prisms (lensms) are used to compensate the atmospheric dispersion. These three types of correctors have similar performances: The maximum element is about 52 cm, and the maximum lensm about 38 cm., the maximum image spread 1.6 sec and the maximum principal ray angle 1 deg 36 min. For each corrector the spread diagrams under the maximum dispersion and zero dispersion states are given.
Wang Ya-Nan
Xu Wen-Li
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