Spincasting of a 3.5-m diameter f/1.75 mirror blank in borosilicate glass

L. W. Goble, J. R.P. Angel, J. M. Hill, E. J. Mannery

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations


A 3.5-meter-diameter telescope primary-mirror blank was cast from E6 borosilicate glass at the University of Arizona, Steward Observatory Mirror Lab. A light-weighted-hollow design was made with a faceplate and backplate separated by a middle volume of ribs in a honeycomb pattern. The curvature of the F/l.75-mirror face was formed by spinning the melted glass at 8.54 RPM. A telescope on Apache Point in New Mexico will use this mirror.

Original languageEnglish (US)
Pages (from-to)300-308
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jan 29 1989
EventAdvances in Fabrication and Metrology for Optics and Large Optics 1988 - San Diego, United States
Duration: Aug 15 1988Aug 18 1988

ASJC Scopus subject areas

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


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