8 September 2004 Chemical and optical investigations of film polarizers with azodyes
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Light-polarizing films are a basis of sheet polarizers, which are used in liquid crystal systems. A light-polarizing film is generally produced by the formation of a uniaxial stretched film made of polyvinyl alcohol (PVA) or its derivatives containing a light-polarizing element like iodine or dichroic dye. Films with iodine are excellent in their initial polarizing performance but poor in resistance to moisture and heat. In order to improve the durability of polarizers more stable dichroic element are used instead of iodine. Films with dichroic organic dyes first of all azodyes are superior in the resistance to moisture and heat as compared with iodine systems. Searching for thermally stable dyes, which do not change their colour under of the influence of high temperature and humidity and are suitable for the manufacturing of effective polarizers is an actual problem. In this paper we show the results of optical investigations of uniaxial PVA-films with iodine (with and without transparent layer) and dichroic azodye.
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Vladimir Agabekov, Vladimir Agabekov, Nadezhda Ariko, Nadezhda Ariko, Nadezhda Ivanova, Nadezhda Ivanova, L. Filippovich, L. Filippovich, S. Shahab, S. Shahab, Vladislav Matusevich, Vladislav Matusevich, Ekaterina Pismennaya, Ekaterina Pismennaya, Armin Kiessling, Armin Kiessling, Richard Kowarschik, Richard Kowarschik, } "Chemical and optical investigations of film polarizers with azodyes", Proc. SPIE 5464, Organic Optoelectronics and Photonics, (8 September 2004); doi: 10.1117/12.545149; https://doi.org/10.1117/12.545149

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