Liquid crystal lens element and optical head device

The present application relates to a liquid crystal lens element and an optical head device, in particular order, to a liquid crystal lens capable of switching the focal length among a plurality of different focal lengths according to switching of applied voltage among a plurality of applied voltage...

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Bibliographic Details
Main Authors Ooi, Yoshiharu, Tanabe, Yuzuru, Sato, Hiromasa, Nomura, Takuji, Shimizu, Ryuichiro
Format Patent
LanguageEnglish
Published 18.05.2010
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Summary:The present application relates to a liquid crystal lens element and an optical head device, in particular order, to a liquid crystal lens capable of switching the focal length among a plurality of different focal lengths according to switching of applied voltage among a plurality of applied voltages, and an optical head device employing the liquid crystal lens, for writing and/or reading an information to/from an optical recording medium.