Heat-Resistant Liquid Crystal Light Modulator Containing Polymer Network for High-Power Luminaires
This paper describes a heat-resistant liquid crystal light modulator, which contains a 20-µm-thick polymer-dispersed liquid crystal film comprising tolane nematic liquid crystal with a high nematic-isotropic phase-transition temperature of 160°C and a three-dimensional fine polymer network of polyac...
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Published in | Japanese Journal of Applied Physics Vol. 39; no. 10R; p. 5870 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.10.2000
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Online Access | Get full text |
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Summary: | This paper describes a heat-resistant liquid crystal light modulator, which contains a 20-µm-thick polymer-dispersed liquid crystal film comprising tolane nematic liquid crystal with a high nematic-isotropic phase-transition temperature of 160°C and a three-dimensional fine polymer network of polyacrylate formed by means of photopolymerization-induced phase separation. The light modulator with an electrically controlled light scattering function can operate in the wide temperature range from room temperature to 120°C with excellent thermal stability. A new light-controllable spot luminaire system using the light modulator and a 575 W high-intensity metal halide lamp is also demonstrated with a high extinction ratio of more than 100 for illumination of television studios and stages. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.39.5870 |