Optics: measuring and testing – Photometers
Patent
1998-11-23
2000-05-16
Font, Frank G.
Optics: measuring and testing
Photometers
209 33, G01J 100
Patent
active
060644761
ABSTRACT:
A method and apparatus for identifying articles is disclosed. The method includes steps of: (a) providing a plurality of articles, each of the articles having at least one portion that includes a photonically active material; (b) for each article, illuminating the at least one portion with light from a stimulus source; (c) identifying a location of the at least one portion by detecting an emission from the photonically active material; (d) pointing an excitation source at the identified location; and (e) illuminating the at least one portion within the identified location with light from the excitation source. A next step detects an information-encoded emission from the photonically active material in response to the light from the excitation source. An optional step (g) sorts the articles based on the detected emission.
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Font Frank G.
Nguyen Tu T.
Spectra Science Corporation
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