30 August 2010 Development and verification of high-durability infrared transparent coating for airborne usage
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In order to use infrared windows in the electro-optical systems, which are integrated to the air platforms, its strength and durability should be high enough for harsh environmental conditions. One of the most challenging environmental conditions is the rain erosion. An infrared substrate may not continue its necessary functions at high velocity flight under rain. Special coating techniques should be used for the infrared transparent substrate to increase its durability. In this study, development of the hard carbon coating, whose substrate material is Germanium, will be discussed. Finite element analysis of the substrate material will be compared with the rain erosion test data. Test results for the developed coating will also be presented to show the improvement on durability performance.
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A. Levent Avşar, A. Levent Avşar, H. Anil Salman, H. Anil Salman, A. E. Sinan Özhan, A. E. Sinan Özhan, Ali Çolakoğlu, Ali Çolakoğlu, } "Development and verification of high-durability infrared transparent coating for airborne usage", Proc. SPIE 7786, Current Developments in Lens Design and Optical Engineering XI; and Advances in Thin Film Coatings VI, 77860K (30 August 2010); doi: 10.1117/12.859665; https://doi.org/10.1117/12.859665

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