Characterizing and identifying materials

Details Characterizing and identifying materials Characterizing and identifying materials

1977-03-31

1978-11-28

Smith, Alfred E.

Radiant energy

Luminophor irradiation

With ultraviolet source

250226, G01N 2138, G01J 334

Patent

active

041277732

ABSTRACT:
In characterizing or identifying an article which is provided with luminescent material, excitation radiation is directed at the article to cause emission from the luminescent material and the intensity of emitted radiation at different wavelengths is compared by directing the emitted radiation to photodetectors through a plurality of optical systems having respective filters of different wavelength transmission and comparing the modified signal level from one photodetector with the signal level from another photodetector.

REFERENCES:
patent: 3573458 (1971-04-01), Anger
patent: 3649118 (1972-03-01), Yano et al.
patent: 3709612 (1973-01-01), Clemens
patent: 3992631 (1976-11-01), Harte

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