Steps toward 8m honeycomb mirrors vii. Spin casting an experimental f/11.8m honeycomb blank of borosilicate glass

L. Goble, J. R.P. Angel, J. M. Hill

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

In March 1985 a 1.8m diameter, f/1 focal ratio, lightweighted honeycomb sandwich mirror blank was cast at the Steward Observatory Mirror Laboratory. The front surface curvature was formed by spinning molten borosilicate glass at 15.6 rpm. The purpose of the casting was to test the method to be used to make 8m honeycomb mirrors. The blank will be used to test a polishing method for f/1 paraboloids.

Original languageEnglish (US)
Pages (from-to)92-105
Number of pages14
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume571
DOIs
StatePublished - Feb 21 1986

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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