Development of surface metrology for the Giant Magellan Telescope primary mirror

James H Burge, W. Davison, H. M. Martin, C. Zhao

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

22 Citations (Scopus)

Abstract

The Giant Magellan Telescope achieves 25 meter aperture and modest length using an f/0.7 primary mirror made from 8.4 meter diameter segments. The systems that will be used for measuring the aspheric optical surfaces of these mirrors are in the final phase of development. This paper discusses the overall metrology plan and shows details for the development of the principal test system - a system that uses mirrors and holograms to provide a null interferometric test of the surface. This system provides a full aperture interferometric measurement of the off-axis segments by compensating the 14.5 mm aspheric departure with a tilted 3.8-m diameter powered mirror, a 77 cm tilted mirror, and a computer generated hologram. The interferometric measurements are corroborated with a scanning slope measurement from a scanning pentaprism system and a direct measurement system based on a laser tracker.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7018
DOIs
StatePublished - 2008
EventAdvanced Optical and Mechanical Technologies in Telescopes and Instrumentation - Marseille, France
Duration: Jun 23 2008Jun 28 2008

Other

OtherAdvanced Optical and Mechanical Technologies in Telescopes and Instrumentation
CountryFrance
CityMarseille
Period6/23/086/28/08

Fingerprint

Metrology
Telescopes
metrology
Telescope
Mirror
Mirrors
telescopes
mirrors
Hologram
Holograms
Scanning
apertures
scanning
Test System
Measurement System
Null
Slope
slopes
Laser
Lasers

Keywords

  • Aspheres
  • Optical fabrication
  • Optical testing
  • Telescopes

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Burge, J. H., Davison, W., Martin, H. M., & Zhao, C. (2008). Development of surface metrology for the Giant Magellan Telescope primary mirror. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7018). [701814] https://doi.org/10.1117/12.790082

Development of surface metrology for the Giant Magellan Telescope primary mirror. / Burge, James H; Davison, W.; Martin, H. M.; Zhao, C.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7018 2008. 701814.

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

Burge, JH, Davison, W, Martin, HM & Zhao, C 2008, Development of surface metrology for the Giant Magellan Telescope primary mirror. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7018, 701814, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, Marseille, France, 6/23/08. https://doi.org/10.1117/12.790082
Burge JH, Davison W, Martin HM, Zhao C. Development of surface metrology for the Giant Magellan Telescope primary mirror. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7018. 2008. 701814 https://doi.org/10.1117/12.790082
Burge, James H ; Davison, W. ; Martin, H. M. ; Zhao, C. / Development of surface metrology for the Giant Magellan Telescope primary mirror. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7018 2008.
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