Dual focal point electro-optic lens with a Fresnel-zone plate on a PLZT ceramic.
A new dual focal point electro-optic lens that is switchable to focusing and unfocusing is proposed and successfully demonstrated. This electro-optic lens is constructed by coating transparent fine electrodes in the Fresnel-zone plate onto a PLZT ceramic plate. Its focal length changes from 1.25 m to infinity binary at 515 nm with the external voltage of 210 V.
Tatebayashi
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Yamamoto
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Sato
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