Improvements in or relating to variable focus lenses

Details Improvements in or relating to variable focus lenses Improvements in or relating to variable focus lenses

G - Physics

02

B

G02B 3/14 (2006.01)

Patent

CA 2265723

A variable focus lens comprises first and second transparent, flexible membranes (2) which are tensioned and which define a cavity (30) in which a transparent, silicone oil (4) is sealed. Adjustment of the pressure or volume of the oil in the cavity changes the focal length of the lens. To fabricate the lens, the periphery of each membrane (2) is engaged between two rings (8, 10; 10, 12) of a set of three interengaging rings (8, 10, 12). The interengaged rings are crimped together to tension the membranes (2) and seal the cavity (30).

L'objectif à focale variable de la présente invention comporte une première et une seconde membranes (2) transparentes, flexibles qui sont mises en tension et qui définissent une cavité (30) à l'intérieur de laquelle est hermétiquement contenue une huile de silicone transparente (4). Le réglage de la pression ou du volume de l'huile présente dans la cavité modifie la distance focale de l'objectif. Lors de la fabrication de cet objectif, on insère le pourtour de chaque membrane (2) entre deux bagues (8, 10; 10, 12) d'un jeu de trois bagues imbriquées (8, 10, 12) qui sont serties l'une à l'autre de manière à mettre les membranes (2) en tension et à sceller ladite cavité (30).

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