X-ray or gamma ray systems or devices – Specific application – Fluorescence
Patent
1980-10-21
1984-04-24
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Fluorescence
250271, 235491, G01M 2322
Patent
active
044452250
ABSTRACT:
A scheme for encoding an article involves marking the article with a first material of at least one element, at least one compound of at least one element or a mixture located at a predetermined position on the article. The article is also marked with a second material of at least one element or a mixture thereof located at a predetermined position on the article. The first and second materials each have the property of emitting x-rays when subjected to a primary source of electromagnetic radiation of appropriate wavelength. The emission wavelength/wavelengths, and intensity/intensities for the first material are a predetermined, coded indication of the location of the second material. The emission wavelength/wavelengths and intensity/intensities of the second material are a predetermined identification or verification code for the article.
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Leonowich, J., et al., "Radioisotope Sources for X-Ray Fluorescence Analysis", J. of Radionalytical Chemistry, vol. 40, (1977), pp. 175 to 187.
Church Craig E.
Intex Inc.
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