Variable focus lens by small changes of the equatorial lens...

G - Physics – 02 – B

Patent

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G02B 3/14 (2006.01) G02B 1/06 (2006.01) G02B 26/08 (2006.01) G03F 7/20 (2006.01)

Patent

CA 2220932

A variable focus lens is constructed by mak-ing small changes in the equatorial diameter of an elastically deformable lens (102, 202, 302, 402, 502). The lens (102, 202, 302, 402, 502) may be deformed by radial tension exerted in a plane gen-erally perpendicular to the optical axis. The radial tension may be exerted by radially acting mechani-cal apparatus (106) or by means of rings (206, 306, 406, 506) embedded or attached at the equator of the lens, whose diameter can be altered by heating, or by imposition of electrical or magnetic fields.

La présente invention concerne une lentille à focale variable, qui est réalisée au moyen de petites modifications du diamètre équatorial d'une lentille déformable de manière élastique (102, 202, 302, 402, 502), qui peut être déformée par une tension radiale exercée dans un plan sensiblement perpendiculaire à l'axe optique. Cette tension radiale peut être appliquée par un dispositif mécanique (106) ou par des anneaux (206, 306, 406, 506) enrobés ou fixés à l'équateur de la lentille, dont la diamètre peut être modifié par chauffage ou par application de champs électriques ou magnétiques.

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