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An optically addressed spatial light modulator with electrolyte bisphtalocyanine of lutetium incorporated in the alignment layer is shown to be capable of memorizing a grey scale image. The relationship between the memorized grey scale and the illumination is shown. The temperature, the concentration of Lu(Pc)2 and the spontaneous polarization of liquid crystals are found to have the effect on the memorization rate.
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Guéna et al. (1998) studied this question.
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