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Proceedings Paper

Joining transparent ceramics
Author(s): A. Shechter; B. Bloch; E. Galun
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Paper Abstract

In the framework of many EL-OP projects there was increasing interest in large optical windows for protecting infrared sensing systems. There are many solutions for dual visible and midwave infrared windows, but for windows larger than 300 mm in diameter only clear Zinc Sulfide is available. When large area windows are required Zinc Sulfide becomes heavy, costly, and with significant optical scattering. Sapphire and ALONTM (Aluminum -oxynitride) were chosen as candidates for the transparent ceramic due to their high strength, availability and low optical scattering. As mentioned above these materials are not available in the form of large windows thus a joining technique was necessitated. Three main joining processes were investigated: Adhesive Bonding, Optical Glass Bonding -OGB and diffusion bonding, which were expected to result in good optical transmittance and moderate to good mechanical performance.

Paper Details

Date Published: 27 April 2009
PDF: 6 pages
Proc. SPIE 7302, Window and Dome Technologies and Materials XI, 730208 (27 April 2009); doi: 10.1117/12.817818
Show Author Affiliations
A. Shechter, Elbit Systems Electro-Optics El-Op Ltd. (Israel)
B. Bloch, Elbit Systems Electro-Optics El-Op Ltd. (Israel)
E. Galun, Elbit Systems Electro-Optics El-Op Ltd. (Israel)

Published in SPIE Proceedings Vol. 7302:
Window and Dome Technologies and Materials XI
Randal W. Tustison, Editor(s)

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