Measuring Cell Gap of Liquid Crystal Displays by Scanning White-Light Tandem Interferometry

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概要

• 論文の詳細を見る

• In this study, we present a scanning white-light tandem interferometric method for determining the cell gap of liquid crystal displays (LCDs). Compared with conventional methods, the proposed method is simple and applicable to most LC cells. Furthermore, the approximate gap value of a tested LC cell is not required before a measurement is made. The LC cell is placed behind a scanning Michelson interferometer containing a white-light source. The interferometric signal from the scanning interferometer and that from the LC cell are recorded simultaneously as a function of the arm-length difference of the scanning interferometer. The cell gap is directly determined from the separation of the two side white-light fringe packets in the subtraction curve of the two recorded interferometric patterns. The method was validated by measuring four different types of LC cell.

• 2009-10-25

著者

• Tsai Shih-Kuo

  Department of Photonics, Feng Chia University, Taichung 40724, Taiwan, R.O.C.

• Lu Sheng-Hua

  Department of Photonics, Feng Chia University, Taichung 40724, Taiwan, R.O.C.

• Kao Ching-Fen

  Institute of Electro-Optical Engineering, MingDao University, Changhua 52345, Taiwan, R.O.C.

関連論文

• Measuring Cell Gap of Liquid Crystal Displays by Scanning White-Light Tandem Interferometry
• Diffractive Laser Encoder with a Grating in Littrow Configuration

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