Optics: measuring and testing – By dispersed light spectroscopy – For spectrographic investigation
Patent
1997-01-21
1998-10-13
Nelms, David C.
Optics: measuring and testing
By dispersed light spectroscopy
For spectrographic investigation
356300, 356301, 356302, 356311, 356320, G01J 340
Patent
active
058220585
ABSTRACT:
A system and method for optical interrogation and measurement of a hydrocarbon fuel gas includes a light source generating light at near-visible wavelengths. A cell containing the gas is optically coupled to the light source which is in turn partially transmitted by the sample. A spectrometer disperses the transmitted light and captures an image thereof. The image is captured by a low-cost silicon-based two-dimensional CCD array. The captured spectral image is processed by electronics for determining energy or BTU content and composition of the gas. The innovative optical approach provides a relatively inexpensive, durable, maintenance-free sensor and method which is reliable in the field and relatively simple to calibrate. In view of the above, accurate monitoring is possible at a plurality of locations along the distribution chain leading to more efficient distribution.
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Adler-Golden Steven
Bernstein Lawrence S.
Bien Fritz
Gersh Michael E.
Goldstein Neil
Nelms David C.
Ratiff Reginald A.
Spectral Sciences Inc.
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