Broadband IR transparent rain and sand erosion protective coating for the AV8-B and GR-7 Harrier forward-looking infrared germanium window

Hugh G. Blackwell; Ewan M. Waddell; Desmond R. Gibson; P. McDermott

doi:10.1117/12.246837

Broadband IR transparent rain and sand erosion protective coating for the AV8-B and GR-7 Harrier forward-looking infrared germanium window

Hugh G. Blackwell, Ewan M. Waddell, Desmond R. Gibson, P. McDermott

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

5 Citations (Scopus)

Abstract

Pilkington Optronics (Barr and Stroud Ltd) has an ongoing development and pre-production activity for ultra-durable coatings. Such coatings provide enhancement of environmental durability of IR 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 san d 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 IR materials: germanium, FLIR ZnS, TUFTRAN, silicon and gallium arsenide. This paper describes a pre- production program to coat the external, face of the AV-8B and GR-7 navigational FLIR germanium windows. Results are presented of optical and environmental performance. Moreover, results of extended flight trials are presented which utilize optical scatter, transmission reduction and coating obscuration to compare durability performance of DLC/BP as compared with DLC. These tests show a factor of at least ten increase in window lifetime through use of boron phosphide.

Original language	English
Title of host publication	Developments In Optical Component Coatings
Editors	Ian Reid
Publisher	Society of Photo-Optical Instrumentation Engineers
Pages	144-158
Number of pages	15
DOIs	https://doi.org/10.1117/12.246837
Publication status	Published - 12 Aug 1996
Externally published	Yes
Event	SPIE Optical Instrumentation and Systems Design, Developments in Optical Component Coatings, 1996, Conference - Glasgow, United Kingdom Duration: 12 May 1996 → 15 May 1996

Publication series

Name	Proceedings of SPIE
Publisher	SPIE
Volume	2776
ISSN (Print)	0277-786X

Conference

Conference	SPIE Optical Instrumentation and Systems Design, Developments in Optical Component Coatings, 1996, Conference
Country/Territory	United Kingdom
City	Glasgow
Period	12/05/96 → 15/05/96

Keywords

Coating
Germanium
Bidirectional reflectance transmission
Particles
Boron
Transmittance
Forward looking infrared

Access to Document

10.1117/12.246837

Cite this

Blackwell, H. G., Waddell, E. M., Gibson, D. R., & McDermott, P. (1996). Broadband IR transparent rain and sand erosion protective coating for the AV8-B and GR-7 Harrier forward-looking infrared germanium window. In I. Reid (Ed.), Developments In Optical Component Coatings (pp. 144-158). (Proceedings of SPIE; Vol. 2776). Society of Photo-Optical Instrumentation Engineers. https://doi.org/10.1117/12.246837

@inproceedings{cc17646a8b4a42c5a5066ead17d3e261,

title = "Broadband IR transparent rain and sand erosion protective coating for the AV8-B and GR-7 Harrier forward-looking infrared germanium window",

abstract = "Pilkington Optronics (Barr and Stroud Ltd) has an ongoing development and pre-production activity for ultra-durable coatings. Such coatings provide enhancement of environmental durability of IR 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 san d 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 IR materials: germanium, FLIR ZnS, TUFTRAN, silicon and gallium arsenide. This paper describes a pre- production program to coat the external, face of the AV-8B and GR-7 navigational FLIR germanium windows. Results are presented of optical and environmental performance. Moreover, results of extended flight trials are presented which utilize optical scatter, transmission reduction and coating obscuration to compare durability performance of DLC/BP as compared with DLC. These tests show a factor of at least ten increase in window lifetime through use of boron phosphide.",

keywords = "Coating, Germanium, Bidirectional reflectance transmission, Particles, Boron, Transmittance, Forward looking infrared",

author = "Blackwell, {Hugh G.} and Waddell, {Ewan M.} and Gibson, {Desmond R.} and P. McDermott",

year = "1996",

month = aug,

day = "12",

doi = "10.1117/12.246837",

language = "English",

series = "Proceedings of SPIE",

publisher = "Society of Photo-Optical Instrumentation Engineers",

pages = "144--158",

editor = "Reid, {Ian }",

booktitle = "Developments In Optical Component Coatings",

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note = "SPIE Optical Instrumentation and Systems Design, Developments in Optical Component Coatings, 1996, Conference ; Conference date: 12-05-1996 Through 15-05-1996",

}

Blackwell, HG, Waddell, EM, Gibson, DR & McDermott, P 1996, Broadband IR transparent rain and sand erosion protective coating for the AV8-B and GR-7 Harrier forward-looking infrared germanium window. in I Reid (ed.), Developments In Optical Component Coatings. Proceedings of SPIE, vol. 2776, Society of Photo-Optical Instrumentation Engineers, pp. 144-158, SPIE Optical Instrumentation and Systems Design, Developments in Optical Component Coatings, 1996, Conference, Glasgow, United Kingdom, 12/05/96. https://doi.org/10.1117/12.246837

Broadband IR transparent rain and sand erosion protective coating for the AV8-B and GR-7 Harrier forward-looking infrared germanium window. / Blackwell, Hugh G.; Waddell, Ewan M.; Gibson, Desmond R. et al.
Developments In Optical Component Coatings. ed. / Ian Reid. Society of Photo-Optical Instrumentation Engineers, 1996. p. 144-158 (Proceedings of SPIE; Vol. 2776).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - Pilkington Optronics (Barr and Stroud Ltd) has an ongoing development and pre-production activity for ultra-durable coatings. Such coatings provide enhancement of environmental durability of IR 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 san d 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 IR materials: germanium, FLIR ZnS, TUFTRAN, silicon and gallium arsenide. This paper describes a pre- production program to coat the external, face of the AV-8B and GR-7 navigational FLIR germanium windows. Results are presented of optical and environmental performance. Moreover, results of extended flight trials are presented which utilize optical scatter, transmission reduction and coating obscuration to compare durability performance of DLC/BP as compared with DLC. These tests show a factor of at least ten increase in window lifetime through use of boron phosphide.

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KW - Bidirectional reflectance transmission

KW - Particles

KW - Boron

KW - Transmittance

KW - Forward looking infrared

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M3 - Conference contribution

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BT - Developments In Optical Component Coatings

A2 - Reid, Ian

PB - Society of Photo-Optical Instrumentation Engineers

T2 - SPIE Optical Instrumentation and Systems Design, Developments in Optical Component Coatings, 1996, Conference

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ER -

Broadband IR transparent rain and sand erosion protective coating for the AV8-B and GR-7 Harrier forward-looking infrared germanium window

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Keywords

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