Large synoptic survey telescope mechanical structure and design

Warren Davison, J Roger P Angel

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

7 Citations (Scopus)

Abstract

The Large-aperture Synoptic Survey Telescope, LSST, will have an effective aperture of ∼6.5 m and a 3 degree field of view. Its 3-mirror optical system with 8.4 m primary, 3.5 m secondary, 4.2 meter tertiary mirrors and a trapped focus offer unique telescope design challenges. The operation of this telescope will require quick slewing, accurate tracking and alignment maintained actively for 0.25 arcsec images in the presence of wind and gravity perturbations. We describe our current design for which finite element models show a lowest frequency resonance above 7 Hertz. Further refinement promises an even suffer structure. The design has been optimized for low mass (230 tons), minimal inertia (2.4×106 kg-m2 in elevation, 3.2×106 kg-m2 in azimuth) for fast response. It takes advantage of several concepts proven in the Large Binocular Telescope mount, which has shown high performance at low cost. These include elevation motion on C rings placed under the primary mirror, a primary mirror cell built as an integral part of the structure, and the elevation axis placed behind and off to the side of the primary vertex, to achieve balance with minimum mass.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsJ.A. Tyson, S. Wolff
Pages104-110
Number of pages7
Volume4836
DOIs
StatePublished - 2002
EventSurvey and Other Telescope Technologies and Discoveries - Waikoloa, HI, United States
Duration: Aug 27 2002Aug 28 2002

Other

OtherSurvey and Other Telescope Technologies and Discoveries
CountryUnited States
CityWaikoloa, HI
Period8/27/028/28/02

Fingerprint

Telescopes
telescopes
mirrors
Mirrors
apertures
slewing
Binoculars
azimuth
Optical systems
inertia
field of view
Gravitation
apexes
alignment
gravitation
low frequencies
perturbation
rings
cells
Costs

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Davison, W., & Angel, J. R. P. (2002). Large synoptic survey telescope mechanical structure and design. In J. A. Tyson, & S. Wolff (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4836, pp. 104-110) https://doi.org/10.1117/12.457315

Large synoptic survey telescope mechanical structure and design. / Davison, Warren; Angel, J Roger P.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / J.A. Tyson; S. Wolff. Vol. 4836 2002. p. 104-110.

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

Davison, W & Angel, JRP 2002, Large synoptic survey telescope mechanical structure and design. in JA Tyson & S Wolff (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4836, pp. 104-110, Survey and Other Telescope Technologies and Discoveries, Waikoloa, HI, United States, 8/27/02. https://doi.org/10.1117/12.457315
Davison W, Angel JRP. Large synoptic survey telescope mechanical structure and design. In Tyson JA, Wolff S, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4836. 2002. p. 104-110 https://doi.org/10.1117/12.457315
Davison, Warren ; Angel, J Roger P. / Large synoptic survey telescope mechanical structure and design. Proceedings of SPIE - The International Society for Optical Engineering. editor / J.A. Tyson ; S. Wolff. Vol. 4836 2002. pp. 104-110
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