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Proceedings Paper

Low-temperature bonding of lightweight mirrors
Author(s): Mary T Strzelecki; Matthew Magida; R. O'Malley; Mark Stier; K. Trefny; Nathaniel P Wyckoff
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Paper Abstract

SCHOTT has developed a Low Temperature Bonding (LTB) technology for fabricating light weight Zerodur optics without the application of high temperature or pressure. The formation of mechanically stable, optically clear joints between two or more glass or glass ceramic parts can be achieved by simply sandwiching an inorganic, aqueous-based solution between chemically prepared surfaces followed by room temperature or slightly elevated temperature curing regimen. This new technology offers a host of advantages over current technologies including room temperature processing, lower production costs and reduced delivery times as well as broad design flexibility. The LTB technology was used in this study to fabricate a 285 mm light-weight plano-plano closed back mirror in an attempt to qualify the bonded assemblies made by this technology for space application. The mirrors were assembled by bonding Zerodur faceplates onto a Zerodur core structure, fabricated via abrasive water jet cutting, to produce a light weighted optic with an aerial density of 24.5 kg/m2. In addition, smaller unit cell structures were also fabricated in a similar fashion for prototype testing. Both the large mirror and the smaller unit cell structures will be measured for surface figure stability before and after thermal cycling and for bonded mechanical strength.

Paper Details

Date Published: 12 December 2003
PDF: 6 pages
Proc. SPIE 5179, Optical Materials and Structures Technologies, (12 December 2003); doi: 10.1117/12.506018
Show Author Affiliations
Mary T Strzelecki, Schott Glass Technologies (United States)
Matthew Magida, Goodrich Corp. (United States)
R. O'Malley, Schott Glass Technologies (United States)
Mark Stier, Goodrich Corp. (United States)
K. Trefny, Goodrich Corp. (United States)
Nathaniel P Wyckoff, Schott Glass Technologies (United States)

Published in SPIE Proceedings Vol. 5179:
Optical Materials and Structures Technologies
William A. Goodman, Editor(s)

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