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Liquid Used as Lens for Miniature Cameras

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Anne L. Fischer

As cell phone cameras and other optical devices become smaller and smaller, the lenses become more complex. When the surface-to-volume ratio increases, so does friction, making it difficult to fabricate tiny lenses with moving parts. As a possible solution, a group at Philips Research Eindhoven in the Netherlands has developed a variable-focus liquid lens with no moving parts. The meniscus between two immiscible liquids forms the lens. One of the liquids is an electrically conducting aqueous solution such as a salt solution, and the other is an insulating one such as a nonpolar oil. The...Read full article

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    Published: October 2004
    Basic Sciencecell phone camerasdefenseoptical devicesPhilips Research EindhovenResearch & TechnologySensors & DetectorsTech Pulsevariable-focus liquid lens

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