Scholarlink

<p>This study proposes a liquid crystal-based polarizer system using guest<b>–</b>host liquid crystals (GHLC) doped with dichroic dye, which enables switching between polarization and normal CCTV modes. The GHLC polarizer overcomes the limitation of reduced light transmittance in low-light conditions, a common drawback of conventional polarizing filters. The system leverages the dielectric anisotropy of liquid crystals and the absorption anisotropy of the dye and enables electrical modulation of transmittance by adjusting the polarization orientation. This functionality facilitates switching between polarization and normal modes, contingent on the amount of light reflected from the subject, thereby ensuring real-time adaptability across diverse lighting environments. Furthermore, the system sustains optimal CCTV performance without necessitating physical intervention, offering enhanced flexibility and efficiency compared with conventional polarizing filter systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Guest-host liquid crystal polarizer for electrically switchable polarization in CCTV systems

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年2月13日

查看全文
  • Na-Kyung Lee,
  • Hyeon-Sik Ahn,
  • Min-Sang Kim,
  • Seungseo Park,
  • Yoonseuk Choi

摘要

This study proposes a liquid crystal-based polarizer system using guest–host liquid crystals (GHLC) doped with dichroic dye, which enables switching between polarization and normal CCTV modes. The GHLC polarizer overcomes the limitation of reduced light transmittance in low-light conditions, a common drawback of conventional polarizing filters. The system leverages the dielectric anisotropy of liquid crystals and the absorption anisotropy of the dye and enables electrical modulation of transmittance by adjusting the polarization orientation. This functionality facilitates switching between polarization and normal modes, contingent on the amount of light reflected from the subject, thereby ensuring real-time adaptability across diverse lighting environments. Furthermore, the system sustains optimal CCTV performance without necessitating physical intervention, offering enhanced flexibility and efficiency compared with conventional polarizing filter systems.