High-strength edge-bonded sapphire windows

Richard L. Gentilman; Patrick Timothy McGuire; Brian G. Pazol; Joel Askinazi; Robert Steindl; John W. Locher

doi:10.1117/12.354633

26 July 1999 High-strength edge-bonded sapphire windows

Richard L. Gentilman, Patrick Timothy McGuire, Brian G. Pazol, Joel Askinazi, Robert Steindl, John W. Locher

Proceedings Volume 3705, Window and Dome Technologies and Materials VI; (1999) https://doi.org/10.1117/12.354633
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

High strength edge bonds have been achieved between individual sapphire components, showing promise for fabricating window blanks up to 600 mm diameter or larger in size. Several bonding methods were investigated, with a directed-energy diffusion-bonding method yielding components with bond fracture strengths of 200 MPa. Bonded sapphire components 600 mm long and 3 mm thick with a 75 mm wide bond line have been produced. When polished, the bonded windows show no degradation in transmittance or transmitted wavefront quality. Process scale up to larger bonds lines is planned. Mechanical and optical characterizations of sub- scale edge-bonded sapphire windows are presented.

Citation Download Citation

Richard L. Gentilman, Patrick Timothy McGuire, Brian G. Pazol, Joel Askinazi, Robert Steindl, and John W. Locher "High-strength edge-bonded sapphire windows", Proc. SPIE 3705, Window and Dome Technologies and Materials VI, (26 July 1999); https://doi.org/10.1117/12.354633

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