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Proceedings Paper

Conformal ALON and spinel windows
Author(s): Lee M. Goldman; Mark Smith; Mohan Ramisetty; Santosh Jha; Suri Sastri
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Paper Abstract

The requirements for modern aircraft-based reconnaissance systems are driving the need for conformal windows for future sensor systems. However, limitations on optical systems and the ability to produce windows in complex geometries currently limit the geometry of existing windows and window assemblies to faceted assemblies of flat windows. ALON consists primarily of aluminum and oxygen, similar to that of alumina, with a small amount of nitrogen added to help stabilize the cubic gamma-AlON phase. ALON’s chemical similarity to alumina, translates into a robust manufacturing process. This ease of processing has allowed Surmet to produce ALON windows and domes in a wide variety of geometries and sizes. Spinel (MgAl2O4) contains equal molar amounts of MgO and Al2O3, and is a cubic material, that transmits further into the Infrared than ALON. Spinel is produced via powder processing techniques similar to those used to produce ALON. Surmet is now applying the lessons learned with ALON to produce conformal spinel windows and domes as well.

Paper Details

Date Published: 13 May 2019
PDF: 11 pages
Proc. SPIE 10985, Window and Dome Technologies and Materials XVI, 109850G (13 May 2019); doi: 10.1117/12.2518902
Show Author Affiliations
Lee M. Goldman, Surmet Corp. (United States)
Mark Smith, Surmet Corp. (United States)
Mohan Ramisetty, Surmet Corp. (United States)
Santosh Jha, Surmet Corp. (United States)
Suri Sastri, Surmet Corp. (United States)

Published in SPIE Proceedings Vol. 10985:
Window and Dome Technologies and Materials XVI
W. Howard Poisl, Editor(s)

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