Steps Toward 8M Honeycomb Mirrors VII. Spin Casting An Experimental f/1 1.8m Honeycomb Blank Of Borosilicate Glass

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

doi:10.1117/12.950389

21 February 1986 Steps Toward 8M Honeycomb Mirrors VII. Spin Casting An Experimental f/1 1.8m Honeycomb Blank Of Borosilicate Glass

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

Author Affiliations +

Proceedings Volume 0571, Large Optics Technology; (1986) https://doi.org/10.1117/12.950389
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

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.

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L. Goble, J. R. P. Angel, and J. M. Hill "Steps Toward 8M Honeycomb Mirrors VII. Spin Casting An Experimental f/1 1.8m Honeycomb Blank Of Borosilicate Glass", Proc. SPIE 0571, Large Optics Technology, (21 February 1986); https://doi.org/10.1117/12.950389

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