Design and analysis of 20 m track mounted and 30 m telescopes

Warren Davison, Neville Woolf, J Roger P Angel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper presents designs of compact 21 and 30 m aperture telescopes with primary focal off/0.7 and f/0.56. The 20 20 telescope moves on three axes; the elevation axis (which is below the primary vertex), the azimuth axis, and a tracking axis at the center of 100 m diameter tracks. The 30 m telescope has an elevation and azimuth axis. All of the axes move on hydrostatic bearings. A primary requirement for such large telescopes is stiffness against deformation by wind gusts. The mass and stiffness needed for the structure is substantially independent of the primary mirror mass, which can therefore be set by thermal and diffraction issues. For the 21 m design, whose primary has seven 8.4 m glass segments weighing 128 tons, the total moving mass is 905 tons, and the lowest resonant frequency 6.5 Hz. For the 30 m design, whose primary has, 13 whole and 6 half, glass segments 8.7 m, across the points, weighing 256 tons, the total moving mass is 3,460 tons, and the lowest resonant frequency 5.3 Hz. These practical designs offer two versatile telescopes with high performance.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsJ.R.P. Angel, R. Gilmozzi
Pages533-540
Number of pages8
Volume4840
DOIs
StatePublished - 2002
EventFuture Giant Telescopes - Waikoloa, HI, United States
Duration: Aug 26 2002Aug 28 2002

Other

OtherFuture Giant Telescopes
CountryUnited States
CityWaikoloa, HI
Period8/26/028/28/02

Fingerprint

Telescopes
telescopes
Weighing
Natural frequencies
azimuth
Stiffness
resonant frequencies
stiffness
Hydrostatic bearings
Glass
gusts
low frequencies
glass
hydrostatics
Mirrors
Diffraction
apexes
apertures
mirrors
requirements

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Davison, W., Woolf, N., & Angel, J. R. P. (2002). Design and analysis of 20 m track mounted and 30 m telescopes. In J. R. P. Angel, & R. Gilmozzi (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4840, pp. 533-540) https://doi.org/10.1117/12.459855

Design and analysis of 20 m track mounted and 30 m telescopes. / Davison, Warren; Woolf, Neville; Angel, J Roger P.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / J.R.P. Angel; R. Gilmozzi. Vol. 4840 2002. p. 533-540.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Davison, W, Woolf, N & Angel, JRP 2002, Design and analysis of 20 m track mounted and 30 m telescopes. in JRP Angel & R Gilmozzi (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4840, pp. 533-540, Future Giant Telescopes, Waikoloa, HI, United States, 8/26/02. https://doi.org/10.1117/12.459855
Davison W, Woolf N, Angel JRP. Design and analysis of 20 m track mounted and 30 m telescopes. In Angel JRP, Gilmozzi R, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4840. 2002. p. 533-540 https://doi.org/10.1117/12.459855
Davison, Warren ; Woolf, Neville ; Angel, J Roger P. / Design and analysis of 20 m track mounted and 30 m telescopes. Proceedings of SPIE - The International Society for Optical Engineering. editor / J.R.P. Angel ; R. Gilmozzi. Vol. 4840 2002. pp. 533-540
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