Hyperspectral optical patterns on retroreflective articles
Assignee3M Innovative Properties Company
InventorsJohn A. Wheatley, Susannah C. Clear
Life of this patent
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Abstract
In some examples, a retroreflective article may include a retroreflective substrate, and an optical pattern embodied on the retroreflective substrate. The optical pattern may include a first optical sub-pattern and a second optical sub-pattern, wherein the optical pattern represents a set of information that is interpretable based on a combination of the first optical sub-pattern that is visible in a first light spectrum and the second optical sub-pattern that is visible in a second light spectrum. The first and second light spectra may be different.
Claims28
A retroreflective article comprising:
- a retroreflective substrate;
- an optical pattern embodied on the retroreflective substrate, the optical pattern comprising a first optical sub-pattern and a second optical sub-pattern, wherein the optical pattern represents a set of information that is interpretable based on a combination of the first optical sub-pattern that is visible in a first light spectrum and the second optical sub-pattern that is visible in a second light spectrum, wherein the first and second light spectra are different.
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A method comprising:
- receiving, by a computing device and from a light capture device, a first image of a retroreflective article comprising a first optical sub-pattern that is visible in a first light spectrum, wherein the first optical sub-pattern is included in an optical pattern embodied on the retroreflective substrate;
- receiving, by the computing device, a second image of the retroreflective article comprising a second optical sub-pattern that is visible in a second light spectrum, wherein the second optical sub-pattern is included in the optical pattern embodied on the retroreflective substrate;
- interpreting the first optical sub-pattern in combination with the second-optical sub-pattern to determine a set of information represented by the optical pattern that comprises the first optical sub-pattern and the second optical sub-pattern;
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- performing at least one operation based at least in part on the set of information.
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Dependencies are inferred from the claim text.