Optical bodies including rough strippable boundary layers and asymmetric surface structures
First Claim
1. An optical body, comprising:
- a first optical film, a second optical film and at least one rough strippable boundary layer disposed between the first and second optical films adjacent to a surface of at least one of the first and second optical films, wherein at least one of the first and second optical films comprises a polymeric multilayer optical film;
wherein a surface of the rough strippable boundary layer disposed adjacent to an optical film comprises a first plurality of surface structures with a first shape and the adjacent surface of the optical film comprises a second plurality of asymmetric surface structures substantially corresponding to said first plurality of surface structures, wherein the asymmetrical surface structures have a second shape comprising at least one dimension different from a corresponding dimension of the first shape.
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Abstract
Optical bodies are disclosed that include an optical film and at least one rough strippable skin layer. The at least one rough strippable skin layer can include a continuous phase and a disperse phase. In some embodiments, the at least one rough strippable skin layer can include a first polymer, a second polymer different from the first polymer and an additional material that is substantially immiscible in at least one of the first and second polymers. In some exemplary embodiments, a surface of the at least one rough strippable skin layer adjacent to the optical film comprises a plurality of protrusions and the adjacent surface of the optical film comprises a plurality of asymmetric depressions substantially corresponding to said plurality of protrusions. Methods of making such exemplary optical bodies are also disclosed.
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Citations
20 Claims
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1. An optical body, comprising:
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a first optical film, a second optical film and at least one rough strippable boundary layer disposed between the first and second optical films adjacent to a surface of at least one of the first and second optical films, wherein at least one of the first and second optical films comprises a polymeric multilayer optical film; wherein a surface of the rough strippable boundary layer disposed adjacent to an optical film comprises a first plurality of surface structures with a first shape and the adjacent surface of the optical film comprises a second plurality of asymmetric surface structures substantially corresponding to said first plurality of surface structures, wherein the asymmetrical surface structures have a second shape comprising at least one dimension different from a corresponding dimension of the first shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An optical body, comprising:
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a first optical film, a second optical film and at least one rough strippable boundary layer disposed between the first and second optical films adjacent to a surface of at least one of the first and second optical films, wherein at least one of the first and second optical films comprises a polymeric multilayer optical film; wherein a surface of the rough strippable boundary layer disposed adjacent to an optical film comprises a first plurality of surface structures with a first major dimension and a first minor dimension, and the adjacent surface of the optical film comprises a second plurality of asymmetric surface structures substantially corresponding to said first plurality of surface structures, wherein the asymmetric surface structures have a second major dimension and a second minor dimension, wherein at least one of the second major dimension and the second minor dimension are different from at least one of the first major dimension and the first minor dimension of the corresponding first surface structures, and wherein the second major dimension is substantially collinear with a first axis of the optical body and the second minor dimension is substantially collinear with a second axis of the optical body, and further wherein an average ratio of the second major dimension to the second minor dimension is at least about 1.5. - View Dependent Claims (18, 19, 20)
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Specification