Multilayer polarizer having a continuous and disperse phase
First Claim
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1. A polarizer, comprising:
- a plurality of layers arranged in a repeating sequence of at least a first, second, and third layer type;
wherein at least one of said first, second, and third layer type comprises a continuous phase and a disperse phase, and wherein said continuous and disperse phases comprise diverse thermoplastic polymers.
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Abstract
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.
157 Citations
16 Claims
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1. A polarizer, comprising:
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a plurality of layers arranged in a repeating sequence of at least a first, second, and third layer type; wherein at least one of said first, second, and third layer type comprises a continuous phase and a disperse phase, and wherein said continuous and disperse phases comprise diverse thermoplastic polymers. - View Dependent Claims (2, 3, 4)
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5. A polarizing film, comprising:
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a first layer comprising a polymeric continuous phase and a disperse phase disposed within said continuous phase; and a second layer, contiguous to said first layer; wherein said first and second layers have indices of refraction which differ by less than about 0.05 for visible light polarized along a first axis and which differ by more than about 0.05 for visible light polarized along a second axis orthogonal to said first axis; and
wherein said first axis is perpendicular to the plane of said film. - View Dependent Claims (6, 7, 8)
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9. A polarizer, comprising:
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a core layer comprising a continuous phase and a disperse phase; a first layer, disposed on a first side of said core layer; and a second layer, disposed on a second side of said core layer; wherein said continuous and disperse phases comprise first and second diverse polymeric materials, respectively, and wherein said first and second layers comprise at least one of said first and second polymeric materials. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification