Fabrication and testing of 4.2m off-axis aspheric primary mirror of Daniel K. Inouye Solar Telescope

Chang Jin Oh, Andrew E. Lowman, Gregory A Smith, Peng Su, Run Huang, Tianquan Su, Daewook Kim, Chunyu Zhao, Ping Zhou, James H Burge

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

15 Scopus citations

Abstract

Daniel K. Inouye Solar Telescope (formerly known as Advanced Technology Solar Telescope) will be the largest optical solar telescope ever built to provide greatly improved image, spatial and spectral resolution and to collect sufficient light flux of Sun. To meet the requirements of the telescope the design adopted a 4m aperture off-axis parabolic primary mirror with challenging specifications of the surface quality including the surface figure, irregularity and BRDF. The mirror has been completed at the College of Optical Sciences in the University of Arizona and it meets every aspect of requirement with margin. In fact this mirror may be the smoothest large mirror ever made. This paper presents the detail fabrication process and metrology applied to the mirror from the grinding to finish, that include extremely stable hydraulic support, IR and Visible deflectometry, Interferometry and Computer Controlled fabrication process developed at the University of Arizona.

Original languageEnglish (US)
Title of host publicationAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
PublisherSPIE
Volume9912
ISBN (Electronic)9781510602038
DOIs
Publication statusPublished - 2016
EventAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation II - Edinburgh, United Kingdom
Duration: Jun 26 2016Jul 1 2016

Other

OtherAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
CountryUnited Kingdom
CityEdinburgh
Period6/26/167/1/16

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Keywords

  • Deflectometry
  • DKIST
  • Fabrication
  • Interferometry
  • Off-Axis Parabola
  • SCOTS
  • Testing

ASJC Scopus subject areas

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

Cite this

Oh, C. J., Lowman, A. E., Smith, G. A., Su, P., Huang, R., Su, T., ... Burge, J. H. (2016). Fabrication and testing of 4.2m off-axis aspheric primary mirror of Daniel K. Inouye Solar Telescope. In Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II (Vol. 9912). [99120O] SPIE. https://doi.org/10.1117/12.2229324