Heat-resistant liquid crystal light modulator containing polymer network for high-power luminaires

Hideo Fujikake, Yoshiaki Tanaka, Saburo Kimura, Hisashi Asakawa, Takemi Tamura, Hiroshi Kita, Kiyofumi Takeuchi, Hiroshi Ogawa, Akio Nagashima, Yozo Utsumi, Kuniharu Takizawa

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)5870-5874
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume39
Issue number10
DOIs
Publication statusPublished - 2000 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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