Method for analyzing color code encoded in magnetic structure

Patent metadata

Field	Value
Publication number	US-9564261-B2
Application number	US-201113271656-A
Country	US
Kind code	B2
Filing date	Oct 12, 2011
Priority date	Apr 14, 2009
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

Provided is a color encoding method including providing a composition including a liquid medium and magnetic nanoparticles dispersed in the liquid medium; applying a magnetic field to the composition to align the magnetic nanoparticles; and applying a patterned energy source to the composition to solidify the composition, wherein more than one region of the composition are sequentially solidified with varying magnetic field strength to fix a plurality of color codes.

First claim

What is claimed is:

1. A method of analyzing a color code, comprising:
providing a magnetic structure including a probe region and a code region encoded with a plurality of color codes which are fixed and have various colors the magnetic structure generated by sequentially irradiating patterned ultraviolet rays while i) varying a magnetic field strength applied to the code region and ii) changing mask patterns so that different regions of the code region are sequentially solidified with different colors and different shapes;
binding a target with the probe region; and
decoding information from the magnetic structure with the target, wherein the code region includes a photonic crystal of fixed magnetic particles.

2. The method according to claim 1 , wherein the fixed magnetic nanoparticles are aligned, and structural colors of the code region are determined by inter-particle distance between the fixed magnetic nanoparticles which are aligned.

3. The method according to claim 1 , wherein the information includes at least one selected from the group consisting of a shape, a position and a color of the color code.

4. The method of claim 1 , wherein the code region is synthesized from a composition including a curable material in which a plurality of magnetic nanoparticles are dispersed, wherein the composition is solidified so that the plurality of magnetic nanoparticles are dispersed, wherein the composition is solidified so that the plurality of magnetic nanoparticles are fixed in the code region.

5. The method according to claim 1 , wherein the decoding is performed by using a microscope and an image analyzer.

6. The method according to claim 5 , wherein the decoding comprises obtaining RGB values of the individual color codes from micrograph readings.

7. The method according to claim 6 , wherein the decoding further comprises digitizing the RGB values to specific code levels.

Assignees

• Kwon Sunghoon
• Lee Howon
• Kim Junhoi
• Kim Hyoki
• Snu R&Db Foundation

Inventors

• Kwon Sunghoon
• Lee Howon
• Kim Junhoi
• Kim Hyoki

Classifications

• B22F1/00

  Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties · CPC title

• B22F1/16

  Metallic particles coated with a non-metal (coated with lubricating or binding agents or with organic material B22F1/10) · CPC title

• C22C2202/02

  Magnetic · CPC title

• B22F2301/155

  Rare Earth - Co or -Ni intermetallic alloys · CPC title

• B22F1/0018

  Operations & Transport · mapped topic