Optics: measuring and testing – By shade or color – Trichromatic examination
Patent
1998-05-11
2000-06-13
Font, Frank G.
Optics: measuring and testing
By shade or color
Trichromatic examination
356407, 356425, G01B 1100
Patent
active
06075608&
ABSTRACT:
An apparatus for sensing blend segregation in a mixture comprises a light transmissive window disposed within a feed connection between a hopper and an extruder for example, a light source for emitting a light beam, and a light sensor to perform spectrum analysis of any incident light supplied thereto. An illumination assembly has a first end optically coupled to the light source and a second end optically coupled to the light transmissive window to illuminate a portion of the internal path provided by the feed connection. At least one detection assembly is provided, having a first end disposed adjacent to the light transmissive window so as to detect the reflection from any illuminated polymer blend passing therethrough. The light sensor collects the diffuse reflecting light from the polymer blend and transforms the diffuse reflecting light into tri-color signals, reflection curves or the like, for comparison with other diffuse reflecting light so as to determine if a particular blend is segregating.
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M.D. Ashton et al., "The Use of a Light Probe for Assessing the Homogeneity of Powder Mixtures," Chemical Engineering Science, 1966, vol. 21, pp. 843-849.
R. Weinekotter et al., "Characterization of Particulate Mixtures by In-Line Measurements," Part. Part. Syst. Charact. 11 (1994) pp. 284-290.
Feldman Sandra Freedman
Foster Robert William
Ortiz, Jr. Angel Luis
Font Frank G.
General Electric Company
Patnode Patrick K.
Ratliff Reginald A.
Snyder Marvin
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