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 inJapanese Journal of Applied Physics Vol. 39; no. 10R; p. 5870
Main Authors Fujikake, Hideo, Tanaka, Yoshiaki, Kimura, Saburo, Asakawa, Hisashi, Tamura, Takemi, Kita, Hiroshi, Takeuchi, Kiyofumi, Ogawa, Hiroshi, Nagashima, Akio, Utsumi, Yozo, Takizawa, Kuniharu
Format Journal Article
LanguageEnglish
Published 01.10.2000
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Abstract 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.
AbstractList 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.
Author Tanaka, Yoshiaki
Asakawa, Hisashi
Fujikake, Hideo
Takizawa, Kuniharu
Kimura, Saburo
Kita, Hiroshi
Ogawa, Hiroshi
Takeuchi, Kiyofumi
Tamura, Takemi
Nagashima, Akio
Utsumi, Yozo
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  givenname: Kuniharu
  surname: Takizawa
  fullname: Takizawa, Kuniharu
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Cites_doi 10.1364/AO.38.002570
10.1063/1.96577
10.3169/itej1978.47.1529
10.1063/1.1653593
10.1080/00268948708071798
10.1117/12.19922
10.2150/jieij1980.83.8_534
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