NTRS - NASA Technical Reports Server
New techniques for fusion bonding and replication for large glass reflectorsLightweight, space-deployable glass honeycomb telescope primary mirror structures are produced by a novel method which involves the heating to softening temperature of many borosilicate or silica glass tube sections that are packed to form a honeycomb matrix and filled with a high expansion coefficient refractory sand. The close packed tubes yield a hexagonal-cell honeycomb. Attention is given to the results of an experiment in which a highly refractory master was used to shape a honeycomb of less refractory glass, employing a 1-micron thick, vacuum-deposited gold coating as a parting layer between the two.
Angel, J. R. P. (Steward Observatory Tucson, AZ, United States)
August 12, 2013
January 1, 1983