Multilayer optical films and articles comprising the same
Assignee3M Innovative Properties Company
InventorsTimothy J. Hebrink, Stephen P. Maki, Charles D. Hoyle, Joel D. Oxman, Matthew T. Scholz, Justin M. Mazzoni, Michael E. Griffin, Anna C. Hamlin
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Abstract
Multilayer optical film comprising at least a plurality of alternating first and second optical layers. Embodiments of the multilayer optical film are useful, for example, in UV-C shield, UV-C light collimator, and UV-C light concentrator applications.
Claims7
A multilayer optical film comprising at least a plurality of alternating first and second optical layers collectively reflecting at least one of 0°, 30°, 45°, 60°, or 75° incident light angle at least 30 percent of incident ultraviolet light over at least a 30-nanometer wavelength reflection bandwidth in a wavelength range from at least 100 nanometers to 280 nanometers,
- wherein the at least first optical layer comprises at least one polyethylene copolymer, and wherein the second optical layer comprises at least one of a copolymer comprising tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride, a copolymer comprising tetrafluoro-ethylene and hexafluoropropylene, or perfluoroalkoxy alkane.
Dependencies are inferred from the claim text.