The Optical Properties of Cholesteric Liquid Crystals Doped with Dye
碩士 === 國立臺灣科技大學 === 高分子工程系 === 91 === Firstly, we mixed nematic liquid crystal with cholesteric liquid crystal to produce a liquid crystal that have two mesophases: Smectic A and Cholesteric. The reflection wavelength of the cholesteric liquid crystal is in visible region. We found the pi...
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ndltd-TW-091NTUST5660412015-10-13T13:35:18Z http://ndltd.ncl.edu.tw/handle/20356549840469744334 The Optical Properties of Cholesteric Liquid Crystals Doped with Dye 染料摻混膽石醇液晶之光學特性研究 Jen-I Hsiao 蕭仁義 碩士 國立臺灣科技大學 高分子工程系 91 Firstly, we mixed nematic liquid crystal with cholesteric liquid crystal to produce a liquid crystal that have two mesophases: Smectic A and Cholesteric. The reflection wavelength of the cholesteric liquid crystal is in visible region. We found the pitch will be shortened during gaining the ambient temperature and the reflection wavelength shifts to short wavelength region. After cholesteric liquid crystal doping with a Methyl Red dye, the dye is pumped by Ar laser and the reflectivity is probed by He-Ne laser. We found the reflectivity increases with gaining laser power, but the reflectivity won’t increase when laser power is too high. Conceivably Methyl Red dye occurred trans-cis transition after pumped by Ar laser, cause unhomogeneous planar texture of cholesteric liquid crystal. This investigation could be applied as optically switched display devices. Jiunn-Yih Lee 李俊毅 2003 學位論文 ; thesis 56 zh-TW |
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碩士 === 國立臺灣科技大學 === 高分子工程系 === 91 === Firstly, we mixed nematic liquid crystal with cholesteric liquid crystal to produce a liquid crystal that have two mesophases: Smectic A and Cholesteric. The reflection wavelength of the cholesteric liquid crystal is in visible region. We found the pitch will be shortened during gaining the ambient temperature and the reflection wavelength shifts to short wavelength region. After cholesteric liquid crystal doping with a Methyl Red dye, the dye is pumped by Ar laser and the reflectivity is probed by He-Ne laser. We found the reflectivity increases with gaining laser power, but the reflectivity won’t increase when laser power is too high. Conceivably Methyl Red dye occurred trans-cis transition after pumped by Ar laser, cause unhomogeneous planar texture of cholesteric liquid crystal. This investigation could be applied as optically switched display devices.
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author2 |
Jiunn-Yih Lee |
author_facet |
Jiunn-Yih Lee Jen-I Hsiao 蕭仁義 |
author |
Jen-I Hsiao 蕭仁義 |
spellingShingle |
Jen-I Hsiao 蕭仁義 The Optical Properties of Cholesteric Liquid Crystals Doped with Dye |
author_sort |
Jen-I Hsiao |
title |
The Optical Properties of Cholesteric Liquid Crystals Doped with Dye |
title_short |
The Optical Properties of Cholesteric Liquid Crystals Doped with Dye |
title_full |
The Optical Properties of Cholesteric Liquid Crystals Doped with Dye |
title_fullStr |
The Optical Properties of Cholesteric Liquid Crystals Doped with Dye |
title_full_unstemmed |
The Optical Properties of Cholesteric Liquid Crystals Doped with Dye |
title_sort |
optical properties of cholesteric liquid crystals doped with dye |
publishDate |
2003 |
url |
http://ndltd.ncl.edu.tw/handle/20356549840469744334 |
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