MULTILAYER OPTICAL FILM WITH NANOPARTICLES

• US 20060285210A1
• Filed: 08/21/2006
• Published: 12/21/2006
• Est. Priority Date: 12/31/2002
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Hebrink, Timothy J., Kolb, Brant U.
• Application Number:
  US11/465,979
• Publication Number:
  US 20060285210A1
• Time in Patent Office: Days
• US Class Current: 359/584
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: G02B 5/305 including organic materials, e.g. polymeric layers
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31797 Next to addition polymer from unsaturated monomers

Abstract

Multilayer optical films, including but not limited to p-polarizing films, have alternating optical layers at least some of which contain nanoparticles in an amount sufficient to enhance the refractive indices of the optical layers.

Claims

1. A multilayer optical film, comprising:

a plurality of alternating first and second optical layers of differing refractive index;

wherein at least one of the first and second layers contains nanoparticles present in an amount sufficient to enhance a refractive index thereof.

2. The film of claim 1, wherein the first layers contain said nanoparticles and the first layers are isotropic.

3. The film of claim 2, wherein the second layers are birefringent.

4. The film of claim 2, wherein the second layers are isotropic.

5. The film of claim 1, wherein said nanoparticles include titania particles.

6. The film of claim 1, wherein said nanoparticles include zirconia particles.

7. The film of claim 1, wherein said nanoparticles are present in an amount of 15 weight percent or greater.

8. The film of claim 1, wherein the nanoparticles include a surface treatment.