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First Claim
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1. A method of creating a signature for an article, the method comprising:
- illuminating regions of the article sequentially by light at non-normal incidence;
detecting light reflected from the surface of each region of the article; and
processing signals representative of the reflected light from each region, the signals being indicative of a surface roughness of the region, to determine a signature for the article.
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Abstract
A method of creating a signature for an article can be provided. The method can comprise illuminating regions of the article sequentially by light at non-normal incidence and detecting light reflected from the surface of each region of the article. The method can further comprise processing signals representative of the reflected light from each region, the signals being indicative of a surface roughness of the region, to determine a signature for the article.
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Citations
20 Claims
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1. A method of creating a signature for an article, the method comprising:
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illuminating regions of the article sequentially by light at non-normal incidence;
detecting light reflected from the surface of each region of the article; and
processing signals representative of the reflected light from each region, the signals being indicative of a surface roughness of the region, to determine a signature for the article. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for creating a signature for an article, the system comprising:
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a light source operable to direct light toward regions of the article sequentially at non-normal incidence;
a detector operable to detect light reflected from the surface of each region of the article; and
a processor operable to process signals representative of the reflected light from each region, the signals being indicative of a surface roughness of the region, to determine a signature for the article. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification