G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 1/00 (2006.01) G02B 5/30 (2006.01)
Patent
CA 2247284
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.
Cette invention se rapporte à un film optique qui comporte une phase dispersée de particules polymères disposées à l'intérieur d'une matrice biréfringente continue. Ce film est orienté, de préférence par étirement, dans au moins une direction. La taille et la forme des particules de la phase dispersée, la fraction volumique de la phase dispersée, l'épaisseur du film et le niveau d'orientation sont choisis de façon à parvenir à un degré souhaité de réflexion diffuse et de transmission totale du rayonnement électromagnétique d'une longueur d'onde donnée dans le film produit.
Allen Richard C.
Carlson Lockwood W.
Kotz Arthur L.
Majumdar Biswaroop
Nevitt Timothy J.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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