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Proceedings Paper

Broadband IR transparent rain and sand erosion protective coating for the F14 aircraft infrared search and track germanium dome
Author(s): Ewan M. Waddell; Desmond R. Gibson; Michael Wilson
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Paper Abstract

Pilkington Optronics (Barr & Stroud Ltd) has an ongoing development and pre-production activity for ultra-durable coatings. Such coatings provide enhancement of environmental durability of infrared transmissive windows and domes on airborne platforms. This activity places particular emphasis on providing protection against rain and solid particle impact at airborne velocities. This program has produced a very effective rain and sand erosion protective, anti-reflective multilayer, based on boron phosphide overcoated with diamond like carbon (DLC/BP). This coating has been demonstrated on a range of infra-red (IR) materials: germanium, FLIR ZnS, TUFTRAN, silicon and gallium arsenide. This paper describes a pre- production program of work to coat the external, convex face of the F14 aircraft IR search and track dome with DLC/BP. This is a 9 inch diameter, extended hemispherical germanium dome. Results are presented of coating uniformity, optical performance, UDRI whirling arm rain erosion, single water jet impact assessment and fracture toughness enhancement.

Paper Details

Date Published: 28 September 1994
PDF: 10 pages
Proc. SPIE 2286, Window and Dome Technologies and Materials IV, (28 September 1994); doi: 10.1117/12.187378
Show Author Affiliations
Ewan M. Waddell, Pilkington Optronics (United Kingdom)
Desmond R. Gibson, Pilkington Optronics (United Kingdom)
Michael Wilson, Naval Air Warefare Ctr. (United States)

Published in SPIE Proceedings Vol. 2286:
Window and Dome Technologies and Materials IV
Paul Klocek, Editor(s)

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