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21 February 1986 Steps Toward 8M Honeycomb Mirrors VII. Spin Casting An Experimental f/1 1.8m Honeycomb Blank Of Borosilicate Glass
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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.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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