4 February 1997 Antireflection coating of cesium iodide optical windows for average IR range
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Proceedings Volume 2967, Optical Inorganic Dielectric Materials and Devices; (1997) https://doi.org/10.1117/12.266544
Event: International Conference on Advanced Optical Materials and Devices, 1996, Riga, Latvia
Abstract
The method of optical surface antireflection and protection of CsJ single crystals has been elaborated. The material and methods of coating covering on the cesium iodide laser windows for IR-range of spectrum were proposed. The analysis of the reflected ray interactions from the optical surface and of the coated transparent film which have different refraction indexes shows that it is possible to change of the reflection coefficient of light from that system. The necessary material and its thickness was chosen. The sodium fluorine film with refraction index n1 equals 1.32 was covered on the optical cesium iodide surface with refraction index n2 equals 1.71 (the film thickness is about 20 micrometers). That's why the reflection coefficient decreased in IR-range (to 16 micrometer). Owing to this transparent of cesium iodide surface increases in that wavelength range. The microstructure of covered film and connected with its transparency and adhesion depend on covering conditions: crystal's temperature and film covering speed. The parameters of the covered coating processes are chosen. The offered methods permits us to produce monocrystalline cesium iodide windows which are transparent in visible and average IR-range of the spectrum.
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I. Houd, I. Houd, Roman Didyk, Roman Didyk, R. Leshchuk, R. Leshchuk, } "Antireflection coating of cesium iodide optical windows for average IR range", Proc. SPIE 2967, Optical Inorganic Dielectric Materials and Devices, (4 February 1997); doi: 10.1117/12.266544; https://doi.org/10.1117/12.266544
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