Spectroscopic cell design
AssigneeAmerican Air Liquide, Inc.
InventorsBenjamin Jurcik, Michael Brandt, Ronald Inman, James McAndrew
Life of this patent
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Abstract
The spectrographic sample cell for the analysis of trace impurities in sample gases. The cell is provided with a gas inlet, a gas outlet and a volume for confining the sample gases for analysis. Two mirrors are provided, a first mirror proximate the gas inlet the second mirror proximate the gas outlet, the first mirror having a hole at its radial center. A conically-shaped cell profile is further provided such that the formation of vortices of sample gas is prevented in the cell upstream of or in the region where the analysis of trace impurities is to take place.
Claims14
In a spectroscopic sample cell for the analysis of trace impurities in sample gases having a gas inlet, a gas outlet and a volume for confirming said sample gases for analysis, the improvements comprising:
- (a) providing two mirrors, a first mirror proximate the gas inlet and a second mirror proximate the gas outlet, said first mirror having a hole at its radial center;
- (b) providing a conically-shaped cell profile substantially at said gas inlet, the diverging angle of said profile being less than approximately 40.degree.;
- wherein the location and sizes of said mirrors and conically-shaped cell profile are such as to substantially prevent the formation of vortices in said sample cell upstream of or in the region where said analysis of trace impurities takes place.
Dependencies are inferred from the claim text.