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Assignee3M Innovative Properties Company
InventorsKevin T. Huseby, Stephen A. Johnson, Samuel A. Minno, Lin Zhao, William T. Fay, David T. Yust, Adam D. Haag
Estimating the term…
A multilayer optical film includes a plurality of optical repeat units which may number less than about 175 in total and which may have a combined average thickness of less than about 20 micrometers. Each of the optical repeat units includes at least four individual layers which may include at least one polymeric A layer, at least two B layers, and at least one polymeric C layer. At least one layer in the at least four individual layers can have an average thickness of less than about 50 nm. An interlayer adhesion of the individual layers in the plurality of optical repeat units can be at least about 14 grams per inch when measured at a 90 degree peel angle. The multilayer optical film may be a reflective polarizer or a multilayer optical mirror.
A reflective polarizer comprising a plurality of optical repeat units disposed between first and second skin layers, each optical repeat unit comprising at least one polymeric A layer, at least two B layers, and at least one polymeric C layer, each pair of adjacent A and C layers having at least one of the two B layers disposed therebetween, a total number of the A and C layers in the plurality of optical repeat units disposed between the first and second skin layers being less than about 400, each of the A and C layers having an average thickness of between about 50 nm and about 500 nm, each of the B layers having an average thickness of less than about 50 nm, each of the first and second skin layers having an average thickness of greater than about 500 nm, the reflective polarizer having an average thickness of less than about 20 micrometers, such that for a light incident on the reflective polarizer in an incident plane, for each of a first incident angle less than about 5 degrees and a second incident angle greater than about 40 degrees, and for a visible wavelength range extending from about 420 nm to about 680 nm, the plurality of optical repeat units has an average optical transmittance of:
A multilayer optical film comprising a plurality of optical repeat units, the optical repeat units in the plurality of optical repeat units numbering less than about 175 in total and having a combined average thickness of less than about 20 micrometers, each of the optical repeat units comprising at least four individual layers, at least first and second individual layers in the at least four individual layers of each of the optical repeat units having respective indices of refraction nx1 and nx2 along a same in-plane x-direction, respective indices of refraction ny1 and ny2 along an in-plane y-direction orthogonal to the x-direction, and respective indices of refraction nz1 and nz2 along a z-direction orthogonal to the x- and y-directions, wherein 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 optical repeat units, the optical repeat units in the plurality of optical repeat units numbering less than about 175 in total and having a combined average thickness of less than about 20 micrometers, each of the optical repeat units comprising at least four individual layers, at least first and second individual layers in the at least four individual layers of each of the optical repeat units having respective indices of refraction nx1 and nx2 along a same in-plane x-direction, respective indices of refraction ny1 and ny2 along an in-plane y-direction orthogonal to the x-direction, and respective indices of refraction nz1 and nz2 along a z-direction orthogonal to the x- and y-directions, wherein for at least one wavelength in a visible wavelength range extending from about 420 nm to about 680 nm:
Dependencies are inferred from the claim text.