An electronic aperture comprises first and second polarizers and a liquid crystal layer disposed between the first and second polarizers. The liquid crystal layer comprises a plurality of liquid crystals having an angular orientation that varies as a function of position. In one exemplary embodiment, the angular orientation of the liquid crystals varies as a function of distance from an optical axis.

 
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> Linear micro motor

> Retractable lens and slidable lens retracting device thereof

~ 00567