Main optical system of China's 2.16-m telescope

Details Main optical system of China's 2.16-m telescope Main optical system of China's 2.16-m telescope

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990scsmp..33..454s&link_type=abstract

Science in China, Series A - Mathematics, Physics, Astronomy and Technological Sciences (ISSN 0253-5831), vol. 33, April 1990, p

Physics

Optics

1

Cassegrain Optics, Lens Design, Systems Engineering, Telescopes, Aberration, Foci, Mirrors

Scientific paper

This paper introduces configuration of the main optical system of China's 2.16-m telescope and the results of its optical design. There are three foci in this telescope: the Cassegrain, the coude, and the prime foci. Ritchey-Chretien (R-C) system is used as the Cassegrain system. The 2-lens and 3-lens correctors are prepared for the Cassegrain and the prime foci, respectively. The most significant characteristic of this optical system is that the coude and Cassegrain systems share one secondary mirror. A relay mirror is added to the coude system. Some other coude configurations and a special configuration for setting the focal reducer are also discussed.

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