Improvements in variable focus optical devices

G - Physics – 02 – B

Patent

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Details

IPC codes

G02B 3/14 (2006.01) G02C 7/08 (2006.01)

Type

Patent

Patent number

CA 2324212

Description

Variable focus optical devices, in particular lenses, can include a cavity at least partially defined by a flexible membrane (2), which may be retained between engaging portions of a frame member (8) and a ring member (12), such that a peripheral region of the membrane is caused to change direction more than twice. The engaging portions of the ring and frame may be high-friction surfaces. In addition, methods of filling a cavity of a lens with transparent fluid, methods of adjusting the pressure of fluid in the cavity, and methods of sealing such a cavity are described, as well the use of such lenses in adjustable spectacles.

Ces dispositifs optiques à focale variable, notamment des verres, peuvent comprendre une cavité définie au moins partiellement par une membrane souple (2), laquelle peut être retenue entre des portions emboîtantes d'un élément de monture (8) et d'un élément d'anneau (12), de façon qu'une région périphérique de cette membrane change de sens plus de deux fois. Les portions emboîtantes de l'anneau et de la monture peuvent être des surfaces à coefficient de friction élevé. En outre, l'invention concerne des procédés de remplissage d'une cavité d'un verre à l'aide d'un fluide transparent, des procédés de réglage de la pression de ce fluide dans la cavité, des procédés de scellement d'une telle cavité, de même que l'utilisation de tels verres dans des lunettes réglables.

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