Variable-focus liquid lens for miniature cameras

Kuiper, S.; Hendriks, B. H. W.
August 2004
Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1128
Academic Journal
The meniscus between two immiscible liquids can be used as an optical lens. A change in curvature of this meniscus by electrowetting leads to a change in focal distance. It is demonstrated that two liquids in a tube form a self-centered lens with a high optical quality. The motion of the lens during a focusing action was studied by observation through the transparent tube wall. Finally, a miniature achromatic camera module was designed and constructed based on this adjustable lens, showing that it is excellently suited for use in portable applications.


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