Some ideas for a Large European Solar Telescope (LEST)

Details Some ideas for a Large European Solar Telescope (LEST) Some ideas for a Large European Solar Telescope (LEST)

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982lest.rept..222r&link_type=abstract

In Oslo Univ. LEST: Large European Solar Telescope p 222-228 (SEE N82-32209 22-89)

Physics

Optics

Functional Design Specifications, Solar Instruments, Telescopes, Adaptive Optics, Atmospheric Turbulence, Interferometry, Lens Design, Paraboloid Mirrors, Pinhole Cameras

Scientific paper

Dome and tube effects, instrument mount, and optics of solar telescopes are discussed, and a Gregory system is advocated for LEST. The advantages of a helium filled tube, and of a closed dome are stressed. An alt-azimuth mount is suggested. The disadvantages of active optics are pointed out. The system proposed has a composite entrance pupil formed by six circular 80 cm, apertures centered on the apexes of a hexagon, and tangent to each other. If turbulence is a problem, interferometry, using two or more of the pupils, can be applied in order to retrieve higher spatial frequencies, or the beams can be directed onto six different auxiliary instruments.

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