Optical combinations for large specialized telescopes

Details Optical combinations for large specialized telescopes Optical combinations for large specialized telescopes

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980crasb.291...39b&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie B - Sciences Physiques, vol. 291, no. 1, July 7, 1980, p. 39-41. In French

Physics

Optics

Hubble Space Telescope, Mirrors, Optical Equipment, Reflecting Telescopes, Cassegrain Optics, Low Cost

Scientific paper

Optical arrangements proposed for two large reflecting telescopes are presented. The first telescope, 1.5 m in diameter, consists of a spherical primary mirror open to F/4 and a deformed secondary mirror (18 microns at the edge) at F/10 with a two-silica-lens corrector which can be used to realize larger apertures or an afocal combination. The second is a three- or four-primary mosaic with an aperture of F/8 and a secondary mirror deformed by 165 microns at the edge. The method of elastic relaxation for the construction of the deformed secondary mirrors is presented, and it is noted that the use of the spherical primary leads to a low-cost apparatus if the diameter of the mirror is less than 1.5 m.

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