Optics: measuring and testing – Inspection of flaws or impurities – Having predetermined light transmission regions
Patent
1996-12-30
1998-10-06
Pham, Hoa Q.
Optics: measuring and testing
Inspection of flaws or impurities
Having predetermined light transmission regions
356 38, 2504611, 2504581, G01N 2128, G01N 2185, G01N 2164
Patent
active
058185771
ABSTRACT:
A method and apparatus for detecting impurities in quartz sand. The apparatus comprises at least one light source; at least one light detector assembly; a transport device; and a signal processor that receives the at least one signal from the at least one light detector assembly. The method comprises moving the quartz sand; illuminating the quartz sand to excite luminescence emission from impurities; receiving luminescence emission from the impurity; generating at least one signal indicative of the excited luminescence emission from the impurity; and determining if the signal represents an impurity in quartz sand.
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Borscheller Jacob Charles
DeMuth Russell Stephen
Duclos Steven Jude
Lou Victor Lien Kong
Srivastava Alok Mani
Cusick Ernst G.
General Electric Company
Johnson Noreen C.
Pham Hoa Q.
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