Spectral method for fast measurement of twisted nematic liquid crystal cell parameters

We present an experimental approach for the fast measurement of twisted nematic (TN) liquid crystal (LC) cells' parameters. It is based on the spectral measurements of the light transmitted by the system polarizer-reference wave plate-LC cell-analyzer. The cell parameters are obtained by fittin...

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Veröffentlicht in:Applied optics (2004) 2014-08, Vol.53 (23), p.5230-5237
Hauptverfasser: Pinzon, Plinio Jesus, Perez, Isabel, Sanchez-Pena, Jose Manuel, Vazquez, Carmen
Format: Artikel
Sprache:eng
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Zusammenfassung:We present an experimental approach for the fast measurement of twisted nematic (TN) liquid crystal (LC) cells' parameters. It is based on the spectral measurements of the light transmitted by the system polarizer-reference wave plate-LC cell-analyzer. The cell parameters are obtained by fitting the theoretical model to the experimental data. This method allows determining the rubbing angle, the twist angle and its sense, and the spectral dispersion of the LC cell retardation, simultaneously, with few measurements and without the need of applying voltage or any specific analytical conditions. The method is validated by characterizing two different TN cells with retardations of about 0.91 and 1.85 μm. The birefringence relative error is less than 1.3%.
ISSN:1559-128X
2155-3165
1539-4522
DOI:10.1364/AO.53.005230