New Simple Model of a Liquid Crystal Light Valve |
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| Authors: | B Kerllenevich A Coche |
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| Institution: | Centre de Recherches Nucléaires et Université Louis Pasteur, Laboratoire de Physique des Rayonnements et d'Electronique Nucléaire , 67037, Strasbourg, Cedex, France |
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| Abstract: | Abstract A liquid crystal light valve, using a heterojunction indium oxide/silicon of high resistivity (10,000 Ω.cm) and based on the cholesteric-nematic transition is described. The characteristics of this device are determined: optimum voltage to be applied to the cell in order to produce the cholestericnematic phase change, incident light power sensitivity, spectral response, rise and decay times. It has been shown that this light valve has an incident power sensitivity of less than 10 μW.cm?2 which passes through a maximum for an incident wavelength of 0.8 μm. This valve can be used in the near infrared; rise times of a few tens of ms are obtained. |
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| Keywords: | Miceller cholesterics microscopic textures |
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