A light conducting plate, method for making the same and...

G - Physics – 02 – B

Patent

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G02B 6/00 (2006.01) F21V 8/00 (2006.01)

Patent

CA 2236260

A light conducting plate is comprised of at least three layers, in which the middle layer for conducting light is of polystyrene, and the upper layer and down layer for reflecting light is of poly methyl methylacrylate or Al film. A shielding layer may be also coated on the outer surface of said reflecting layers respectively, thereby a light conducting plate having more than three layers is provided. Said shielding layer can be of resin coating or film. The light conducting plate of the present invention can be used for manufacturing signboards, billboards and instrument panels.

La présente invention concerne une plaque photoconductrice constituée d'au moins trois couches, la couche sandwich photoconductrice étant en polystyrène, la couche supérieure et la couche inférieur photoréflectrices étant en constituées d'un film de méthylacrylate de polyméthyle ou d'un film d'aluminium. Une couche écran peut également être appliquée sur la surface extérieure de chacune des couches photoréflectrices, ce qui permet de réaliser une plaque photoconductrice constituée de plus de trois couches. Ladite couche écran peut être un revêtement ou un film de résine. La plaque photoconductrice de la présente invention convient particulièrement à la confection de panneaux indicateurs, d'enseignes et d'afficheurs d'instrumentation.

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