An optical film with co-continuous phases

Details An optical film with co-continuous phases An optical film with co-continuous phases

G - Physics

02

B

G02B 1/04 (2006.01) G02B 1/08 (2006.01)

Patent

CA 2246759

An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.

La présente invention concerne un film optique constitué d'une phase de particules polymères en dispersion à l'intérieur d'une matrice biréfringente continue. L'orientation de ce film est obtenue, selon un ou plusieurs axes, par extension. Le calibre et la forme des particules de la phase de dispersion, la fraction volumique de la phase de dispersion, l'épaisseur du film et le taux d'orientation sont choisis de façon à obtenir un film résultant caractérisé par un niveau spécifique de réflexion diffuse ainsi que par une transparence totale aux rayonnements électromagnétiques d'une longueur d'ondes spécifique.

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