22 May 2015 Conformal ALON® windows
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Abstract
Aluminum Oxynitride (ALON® Optical Ceramic) combines broadband transparency with excellent mechanical properties. ALON’s cubic structure means that it is transparent in its polycrystalline form, allowing it to be manufactured by conventional powder processing techniques. Surmet controls every aspect of the manufacturing process, beginning with synthesis of ALON® powder, continuing through forming/heat treatment of blanks, ending with optical fabrication of ALON® windows. Surmet has made significant progress in its production capability in recent years. Additional scale up of Surmet’s manufacturing capability, for complex geometries, larger sizes and higher quantities, is underway. The requirements for modern aircraft 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. Surmet’s ability to produce large curved ALON® blanks is an important step in the development of conformal windows for future aircraft applications.
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Lee M. Goldman, Sreeram Balasubramanian, Mark Smith, Nagendra Nag, Robyn Foti, Santosh Jha, Suri Sastri, "Conformal ALON® windows", Proc. SPIE 9453, Window and Dome Technologies and Materials XIV, 945306 (22 May 2015); doi: 10.1117/12.2177236; https://doi.org/10.1117/12.2177236
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