Rain erosion protection of IR materials using boron phosphide coatings

Ewan M. Waddell; Brian C. Monachan

doi:10.1117/12.22494

1 October 1990 Rain erosion protection of IR materials using boron phosphide coatings

Ewan M. Waddell, Brian C. Monachan

Proceedings Volume 1326, Window and Dome Technologies and Materials II; (1990) https://doi.org/10.1117/12.22494
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Boron phosphide is shown to be an excellent component of coatings which protect infra-red substrate materials from harsh military environments. Substrate materials used in the 8-l2j.m band tend to be brittle, weak and susceptible to various forms of damage. Erosion due to rain impact during high speed flight is one important type of such damage. Results are presented which demonstrate that coatings containing boron phosphide can be used to protect substrate materials such as ZnS and Ge from the effects of rain impact. Anti-reflection properties of the coatings are also considered and results presented for both single and multilayer coatings. The other materials used in the multilayers are, like boron phosphide, deposited by plasma assisted chemical vapour deposition (PACVD) which results in a very durable coating system.

Citation Download Citation

Ewan M. Waddell and Brian C. Monachan "Rain erosion protection of IR materials using boron phosphide coatings", Proc. SPIE 1326, Window and Dome Technologies and Materials II, (1 October 1990); https://doi.org/10.1117/12.22494

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