Multilayer Infrared Anti-Reflection and Hard Coating on Polycrystal Gallium Arsenide
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- Nagashima Mitsuhiro
- Electronics Systems Research Center, TRDI, Ministry of Defense
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- Wada Hideo
- Electronics Systems Research Center, TRDI, Ministry of Defense
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Abstract
We have designed and prepared the multilayer anti-reflection (AR) and diamond-like carbon (DLC) hard coatings for a large scale polycrystal gallium arsenide (Poly-GaAs) infrared optical window to improve its transmittance and surface hardness. The coatings were deposited on 100 mm diameter Poly-GaAs substrates and their optical properties were analyzed. The optimum optical designs are found to be IRX/Ge/YF3 with buffer layer Y2O3 for AR coating, and DLC/Ge/Y2O3 and DLC/BP for DLC hard coating, respectively. Their transmittances are 98% for AR coating and 85-87% for DLC coating, which are 5-10% higher than the values for the conventional infrared protective ZnS windows used for airborne infrared thermal imaging systems.
Journal
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- IEEJ Transactions on Fundamentals and Materials
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IEEJ Transactions on Fundamentals and Materials 127 (7), 375-381, 2007
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390001204593610624
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- NII Article ID
- 10019523398
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- NII Book ID
- AN10136312
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- ISSN
- 13475533
- 03854205
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- NDL BIB ID
- 8878143
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed