Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ngst.conf...99n&link_type=abstract
The Next Generation Space Telescope, p. 99
Astronomy and Astrophysics
Astronomy
Infrared Telescopes, Segmented Mirrors, Astronomical Observatories, Fabrication, Deformable Mirrors
Scientific paper
The Keck Observatory is a project to build a 10-m optical and infrared telescope for ground based astronomy. The primary is composed of 36 hexagonal segments that together form an f/1.75 hyperbola. The segment positions are actively controlled to remove the adverse effects of gravitational and thermal deformations on the supporting steel structure. Details of the project are described in a number of internal reports and memos and periodic status are given in recent SPIE proceedings. A review of the characteristics of the Project with emphasis on the segment fabrication and the active control system was presented at this conference. Since most of this information is available in the recent SPIE proceedings information of a general nature is not repeated here. We only report here some interesting aspects of segment fabrication that may be of interest for large high accuracy telescopes in space.
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