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Liquid Crystal Arrays Produce Variable-Focus Lenses

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Richard Gaughan

Liquid crystal arrays may be used to modulate the intensity of light transmitted through a specific region. Whether in a reflective configuration, such as in the first liquid crystal display (LCD) watch introduced by Seiko in 1973, or in transmissive systems, such as the displays in the latest portable DVD players, voltage is applied to a liquid crystal pixel to modify the amount of light delivered through it. Different voltages on liquid crystals introduce different phase delays. By tailoring the phase profile of pixels in a commercial liquid crystal array, researchers created...Read full article

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    Published: March 2005
    Glossary
    liquid crystal display
    An alphanumeric display formed by a layer of liquid crystal material sandwiched between two sheets of glass; a transparent conductive coating on the glass is etched to form the character segments. An applied voltage causes the appropriate segments to darken as the molecules in the liquid crystal change their arrangement.
    ConsumerLiquid crystal arraysliquid crystal displayportable DVD playersResearch & TechnologyTech Pulse

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