Development of lightweight, glass mirror segments for the Large Deployable ReflectorAccomplishments in the development of lightweight, honeycomb-core, sandwich mirror blanks made of borosilicate and high-silica glasses at the University of Arizona for the Large Deployable Reflector program are described. In this paper, work spanning the last 2 years is reported, highlighting a new mirror blank fabrication technique that permits the fabrication of the honeycomb core integrally with the front and back plates of the blank in a single furnace cycle. Two types of mirror blanks made by this method, an off-axis, aspheric segment and a smaller Vycor circular piece, are described. The fabrication of two off-axis, aspheric mirror segments is also described. Cryogenic test results are included on the test of a 38-cm diameter, lightweight, honeycomb core, sandwich mirror made of Pyrex.
Document ID
19870023733
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Melugin, R. K. (NASA Ames Research Center Moffett Field, CA, United States)
Miller, J. H. (NASA Ames Research Center Moffett Field, CA, United States)
Angel, J. R. P. (NASA Ames Research Center Moffett Field, CA, United States)
Wangsness, P. A. A. (Steward Observatory Tucson, AZ, United States)
Parks, R. E. (Arizona, University Tucson, United States)