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US 2022/0373728 A1Published application
Optical body including multilayer optical film and thin adhesive layer
Assignee3M Innovative Properties Company
InventorsKarissa L. Eckert, Michelle L. Toy, Adam D. Haag, Matthew B. Johnson, Albert I. Everaerts, Quinn D. Sanford
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Abstract
Optical bodies are described. In particular, optical bodies having a birefringent multilayer optical film and a continuous adhesive layer with a thickness less than 20 micrometers are described. Optical bodies described herein exhibit reduced occurrence and severity of a non-uniformity defect known as “orange peel.”
Claims12
An optical body, comprising:
- a birefringent multilayer optical film;
- a continuous adhesive layer disposed on a first major surface of the birefringent multilayer optical film;
- and
- a glass or plastic substrate layer attached to the multilayer optical film via the continuous adhesive layer;
- wherein the continuous adhesive layer has a thickness less than 20 micrometers;
- and
- wherein the optical body, measured through the glass or plastic substrate layer with an interferometer, has a peak-to-valley surface roughness of less than 50 nm.
4 more elements
A method of providing an optically smooth laminated optical body, the method comprising:
- providing a birefringent multilayer optical film coated with a continuous adhesive layer having a thickness less than 20 micrometers and having a polymeric liner disposed on the continuous adhesive layer;
- removing the polymeric liner;
- attaching the birefringent multilayer optical film and the continuous adhesive layer to a glass or plastic substrate layer to form an optically smooth laminated optical body;
- wherein the optically smooth laminated optical body, measured through the glass or plastic substrate layer with an interferometer, has a peak-to-valley surface roughness of less than 50 nm.
1 more element
Dependencies are inferred from the claim text.