论文信息 - Spincasting Of A 3.5-m Diameter f/1.75 Mirror Blank In Borosilicate Glass

Spincasting Of A 3.5-m Diameter f/1.75 Mirror Blank In Borosilicate Glass

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 volule of ribs in a honeycomb pattern. The curvature of the F/1.75-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.

James Roger P. Angel | John M. Hill | L. Goble | E J. Mannery

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