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US 2024/0201427 A1Published application
Multilayer Optical Film
Assignee3M Innovative Properties Company
InventorsLin Zhao, Gilles J. Benoit, Stephen A. Johnson
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Assignee3M Innovative Properties Company
InventorsLin Zhao, Gilles J. Benoit, Stephen A. Johnson
Estimating the term…
A multilayer optical film includes a plurality of polymeric first layers numbering at least 10 in total where each of the first layers has an average thickness less than about 500 nm. For a p-polarized incident light, and for each of a first incident angle and a second incident angle greater than the first incident angle by at least about 40 degrees: a reflectance of each of the optical film and the plurality of polymeric first layers versus wavelength has a reflection band having a left band edge (LBE) at a short wavelength side of the reflection band and a right band edge (RBE) at a long wavelength side of the reflection band. A separation between the RBEs is less than a separation between the LBEs for the first incident angle, and a separation between the RBEs is greater than a separation between the LBEs for the second incident angle.
A multilayer optical film comprising a plurality of polymeric first layers numbering at least 10 in total disposed on a plurality of polymeric second layers numbering at least 10 in total, each of the first and second layers having an average thickness of less than about 500 nm, such that in a predetermined wavelength range that is at least about 200 nm wide and is disposed between about 200 nm and about 2000 nm, for a p-polarized incident light, and for each of a first incident angle and a second incident angle greater than the first incident angle by at least about 40 degrees:
A multilayer optical film comprising a plurality of polymeric first layers numbering at least 10 in total disposed on a plurality of polymeric second layers number at least 10 in total, each of the first and second layers having an average thickness of less than about 500 nm, such that in a predetermined wavelength range that is at least about 200 nm wide and is disposed between about 200 nm and about 2000 nm, and for a p-polarized incident light, maximum reflectances of the optical film and the plurality of polymeric first layers are respectively Cmax and Lmax for a first incident angle and C′max and L′max for a second incident angle greater than the first incident angle by at least about 40 degrees, wherein Cmax and Lmax are within 20% of each other, and C′max≥2 L′max.
A multilayer optical film comprising a plurality of alternating first and second polymeric layers disposed on, and integrally formed with, a plurality of alternating third and fourth polymeric layers and a plurality of alternating fifth and sixth polymeric layers, each of the three pluralities comprising at least 20 polymeric layers in total, each of the first through sixth polymeric layers having an average thickness of less than about 500 nm, the first through sixth polymeric layers comprising respective refractive indices nx1 through nx6 along a same in-plane x-direction, respective refractive indices ny1 through ny6 along an in-plane y-direction orthogonal to the x-direction, and respective refractive indices nz1 through nz6 along a thickness direction of the polymeric layers orthogonal to the x- and y-directions, such that for at least one wavelength in a visible wavelength range extending from about 420 nm to about 680 nm;
A multilayer optical film comprising a plurality of polymeric first layers disposed on, and integrally formed with, a plurality of polymeric second layers, each of the two pluralities comprising at least 10 polymeric layers in total, each of the first and second layers having an average thickness of less than about 500 nm, such that for a p-polarized incident light in a predetermined wavelength range that is at least about 200 nm wide and is disposed between about 200 nm and about 2000 nm;
A multilayer optical film comprising a plurality of alternating first and second polymeric layers disposed on, and integrally formed with, a plurality of alternating third and fourth polymeric layers, each of the two pluralities comprising at least 10 polymeric layers in total, each of the first through fourth polymeric layers having an average thickness of less than about 500 nm, such that for an unpolarized incident light in a predetermined wavelength range that is at least about 200 nm wide and is disposed between about 200 nm and about 2000 nm, an optical reflectance of the optical film versus wavelength comprises a reflection band having a full width at half maximum of less than about 100 nm for at least a first incident angle less than about 25 degrees, and for at least one first wavelength in the reflection band, the optical reflectance of the optical film is greater than about 50% for each of the first incident angle and a second incident angle greater than the first incident angle by at least about 60 degrees.
Dependencies are inferred from the claim text.