The Keck Telescope

Details The Keck Telescope The Keck Telescope

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989amsci..77..170n&link_type=abstract

American Scientist (ISSN 0003-0996), vol. 77, Mar.-Apr. 1989, p. 170-176.

Astronomy and Astrophysics

Astronomy

3

Infrared Astronomy, Telescopes, Apertures, Paraboloid Mirrors

Scientific paper

The Keck Telescope, currently under construction on Mauna Kea, will employ a primary mirror formed from 36 hexagonal segments arranged in mosaic fashion and supported with exceptional structural efficiency by a space frame. Each of the 36 mirror segments is 1.8 m wide, but only 7.5 cm thick; this thinness will yield not only exceptionally low weight, but a degree of flexibility. Whiffletree supports will distribute the weight of each of the mirrors on 36 points to keep gravitational deformations to a minimum. A total of 168 sensors will inform the computerized control system by means of which three actuators/segment (108 in all) will determine the tilt and height of each segment.

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