Light filtering lens film

G - Physics – 02 – B

Patent

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Details

G02B 5/20 (2006.01) A61F 9/06 (2006.01) G02B 1/10 (2006.01)

Patent

CA 2278456

A lens film is used in filtering visible, infrared, and ultraviolet light. The lens film has one or more metallized layers stacked together. Each metallized layer has a substrate with a metal coating covering one face of the substrate. One or more protecting layers are disposed over the stack of metallized layers to provide protection film. The lens film also has an ultraviolet absorbing material, such as an ultraviolet absorbing binder or substrate material. The lens film can be configured so that it meets the American National Standards Institute's shade standards for protection from harmful or intense light. The lens film can be mounted on a lens of an eye protection device. One method of mounting the lens is to provide an adhesive layer over a portion of the lens film and then binding the lens film to the lens with the adhesive layer.

Un film de lentille s'utilise pour filtrer la lumière visible, infrarouge et ultraviolette. Ce film de lentille présente une ou plusieurs couches métallisées superposées. Chaque couche métallisée possède un substrat pourvu d'un revêtement métallique recouvrant un de ses faces. Une ou plusieurs couches protectrices sont disposées par-dessus la pile de couches métallisées pour assurer un film de protection. Le film de lentille comporte également un matériau absorbant le rayonnement ultraviolet, tel qu'un liant ou un matériau de subtrat absorbant le rayonnement ultraviolet. Le film de lentille peut être configuré de manière à répondre aux normes de couleurs ANSI pour la protection contre un rayonnement nocif ou intense. Le film de lentille peut se monter sur une lentille d'un dispositif de protection oculaire. Un procédé de montage de ce film consiste à disposer une couche adhésive sur une portion du film de lentille puis à lier ce film à la lentille à l'aide de la couche adhésive.

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