G - Physics
02
F
G02F 1/29 (2006.01) A61F 2/16 (2006.01) G02C 7/02 (2006.01) G02C 7/06 (2006.01) G02C 7/08 (2006.01) G02C 7/10 (2006.01)
Patent
CA 2159076
A lens assembly (I) comprises a lens (2; 10, 11; 20) the focal length of which may be changed by application of an electric or magnetic field. A switching means (4, 15) provides a drive impulse to change the focal length of the lens (2; 10, 11; 20). An integral power source (4, 15) provides power for the switching means. A lens which can be switched between near and distance vision by the user is thereby provided.
Ensemble à lentille (1) comportant une lentille (2; 10, 11; 20) dont on peut faire varier la distance focale par application d'un champ électrique ou magnétique. Un dispositif de commutation (4, 15) délivre une impulsion de commande permettant de modifier la distance focale de la lentille (2; 10, 11; 20). Une source d'alimentation incorporée (4, 15) assure l'alimentation du dispositif de commutation. Ainsi, on obtient une lentille permettant à l'utilisateur de passer de la vision rapprochée à la vision éloignée.
Borden Ladner Gervais Llp
Ttp Group Plc
LandOfFree
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