Lens with variable focus

G - Physics – 02 – B

Patent

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Details

G02B 3/14 (2006.01) G02B 26/02 (2006.01) G02F 1/01 (2006.01)

Patent

CA 2306249

The invention concerns a lens with variable focus comprising a chamber (12) filled with a first liquid (13), a drop of a second liquid (11) being provided on a first surface zone of the chamber wall, wherein the chamber wall is made of an insulating material, the first liquid is conductive, the second liquid insulating, the first and second liquid are immiscible, with different optical indices and substantially of the same density. Means are provided for positioning said drop in inoperative position on said zone, comprising electrical means for applying a voltage stress between the conductive liquid and an electrode (16) arranged on said wall second surface, and centering means for maintaining the centering and controlling the shape of the drop edge while a voltage is being applied by electrowetting.

Lentille à focale variable comprenant une enceinte (12) remplie d'un premier liquide (13), une goutte d'un deuxième liquide (11) étant disposée sur une zone d'une première face d'une paroi de l'enceinte, dans laquelle la paroi de l'enceinte est réalisée en matériau isolant, le premier liquide est conducteur, le deuxième liquide est isolant, le premier et le deuxième liquide sont non miscibles, d'indices optiques différents et sensiblement de même densité, il existe des moyens de positionnement au repos de ladite goutte sur ladite zone, et comprenant des moyens électriques pour appliquer une tension électrique entre le liquide conducteur et une électrode (16) disposée sur la deuxième face de ladite paroi, et des moyens de centrage pour maintenir le centrage et contrôler la forme du bord de la goutte tandis qu'une tension est appliquée, par le phénomène de l'électromouillage.

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