Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Reexamination Certificate
2005-06-21
2005-06-21
Lauchman, Layla (Department: 2877)
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
C356S317000, C356S319000, C250S339010
Reexamination Certificate
active
06909505
ABSTRACT:
An apparatus and a method are disclosed for use with Laser Induced Breakdown Spectroscopy (LIBS) systems that can be applied to the real time analysis of molten materials or liquid. Since it is difficult to prepare a surface representative of the bulk when dealing with high temperature molten material, the invention, in one aspect, uses a forced gas flow through a tube insertable inside the molten material to generate a bubble. The inner surface of the bubble is a representative of the composition of the material. LIBS performed on such a surface produces an accurate real time analysis of material, even when other processing of material, e.g., copper smelting, etc., is being conducted.
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St-Onge et al, Spectrochimica Acta B, vol. 57, pp. 121-135, 2002.
Heon Rene
Lucas John M.
Sabsabi Mohamad
Borden Ladner Gervais LLP
Kinsman L. Anne
Lauchman Layla
National Research Council of Canada
Noranda Inc.
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