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Proceedings Paper

Low reflectance DLC coatings on various IR substrates
Author(s): Mordechai Gilo; Amnon Azran
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Paper Abstract

Diamond Like Carbon (DLC) or Hard Carbon (HC) single layer coatings on optical substrates are commonly used. As a single layer, the resulting average reflectance in different spectral ranges (about 2.5% in the 3-5 μm region) needs improvements. We propose multilayer coatings having a DLC upper layer applied on Si, Ge and other materials. These coatings result in an average reflection of less than 0.5% in either the 3.4-5 μm or the 8-11.5 μm regions. The average transmittance in these regions is more than 97%. The durability is comparable to single layer DLC coatings. These coatings are suitable to front surface FLIR lens assemblies. The effect on the performance of a zoom lens assembly and the reduction of the Narcissus effect is shown.

Paper Details

Date Published: 31 May 2012
PDF: 8 pages
Proc. SPIE 8353, Infrared Technology and Applications XXXVIII, 835320 (31 May 2012); doi: 10.1117/12.917299
Show Author Affiliations
Mordechai Gilo, Ophir Optronics Ltd. (Israel)
Amnon Azran, Ophir Optronics Ltd. (Israel)

Published in SPIE Proceedings Vol. 8353:
Infrared Technology and Applications XXXVIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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