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1 June 1994 Automated design technique for steel trusses supporting close-packed hexagonal mirror segment arrays
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Abstract
One method of reducing the cost of a large terrestrial telescope is to fix its spherical primary mirror with respect to gravity and utilize a tracking mechanism revolved about the mirror's center of curvature to compensate for an astronomical image's ephemeral position and rate. To maximize throughput, hexagonal segments may be arrayed in a close-packed fashion on the primary sphere, but because regular hexagons do not tile a spherical surface, either the hexagons must be irregular, as in the Keck 10 m telescope, or they must be irregularly spaced. In either case, we can exploit the natural symmetry of the underlying geometry in order to define a truss generation scheme which is generally useful in both design and cost reduction.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank B. Ray "Automated design technique for steel trusses supporting close-packed hexagonal mirror segment arrays", Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); https://doi.org/10.1117/12.176266
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