Patterned wavelength-selective image

Patent metadata

Field	Value
Publication number	US-11953706-B2
Application number	US-201917262042-A
Country	US
Kind code	B2
Filing date	Jul 23, 2019
Priority date	Jul 24, 2018
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

Wavelength-selective films are visibly apparent under the selective wavelength. Wavelength-selective films typically reflect off axis the selected wavelength and therefore can provide high-contrast against a background when applied in a pattern on a substrate. However, it is difficult to apply unique patterned embedded images from film. Disclosed is a cost-effective method and construction of a patterned wavelength-selective image to a substrate. In the disclosed wavelength-selective image, wavelength-selective film particles are applied to an adhesive pattern to create the wavelength-selective image.

First claim

What is claimed is:

1. A light directing article with an image comprising:
a substrate;
an adhesive pattern at a first region of the substrate;
a plurality of wavelength-selective film particles at the adhesive forming the image.

2. The light directing article of claim 1 , further comprising a transparent layer, wherein the adhesive pattern is on the substrate and the wavelength-selective film particles are between the transparent layer and the substrate.

3. The light directing article of claim 1 , wherein the substrate is a transparent layer, wherein the adhesive pattern is on the transparent layer and the wavelength-selective film particles are between the transparent layer and an optically active substrate.

4. The light directing article of claim 1 , wherein the wavelength-selective film particles are transparent in a visible light spectrum.

5. The light directing article of claim 1 , wherein the wavelength-selective film particles are reflective in an infrared or near infrared light spectrum.

6. The light directing article of claim 1 , wherein the adhesive pattern is from a continuous layer of adhesive with a mask applied to regions to expose the adhesive pattern.

7. The light directing article of claim 1 , wherein the adhesive is transparent in a visible light spectrum and transparent in a light spectrum that corresponds with the wavelength-selective film particles.

8. The light directing article of claim 1 , further comprising an encapsulation adhesive surrounding the patterned adhesive and wavelength-selective film particles.

9. The light directing article of claim 1 , wherein the adhesive pattern is a barcode.

10. A process for making a light directing article comprising:
providing a substrate;
providing a plurality of wavelength-selective film particles;
forming an adhesive in a pattern with wavelength-selective film particles at a first region of the substrate.

11. The process of claim 10 , further comprising:
applying a transparent layer such that the wavelength-selective film particles are between the transparent layer and the substrate.

12. The process of claim 10 , wherein the substrate is a transparent layer such that the wavelength-selective film particles are between the transparent layer and an optically active substrate.

13. The process of claim 10 , wherein the wavelength-selective film particles are transparent in a visible light spectrum.

14. The process of claim 10 , wherein the wavelength-selective film particles are reflective in an infrared or near infrared light spectrum.

15. The process of claim 10 , wherein the wavelength-selective film particles each is a multi-layer optical film having its longest length less than 25 millimeters.

Assignees

• 3M Innovative Properties Company

Inventors

• Chen-Ho Kui
• Smith Kenneth L
• Dunn Douglas S
• Whiting Tien Yi T H
• Wheatley John A
• Whiting Bryan T
• Kobe Taylor J
• Schultz Anthony F
• Fansler Duane D
• Shaver Jonah

Classifications

• G02B5/0816 Primary

  Multilayer mirrors, i.e. having two or more reflecting layers (G02B5/0883, G02B5/0891 take precedence) · CPC title

• G02B5/12

  Reflex reflectors · CPC title

• G02B5/208 Primary

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• G09F2003/0225

  Carrier web · CPC title