GAS IMAGING SYSTEM
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Abstract
A spectral imaging system configured to obtain spectral measurements in a plurality of spectral regions is described herein. The spectral imaging system comprises at least one optical detecting unit having a spectral response corresponding to a plurality of absorption peaks of a target chemical species. In an embodiment, the optical detecting unit may comprise an optical detector array, and one or more optical filters configured to selectively pass light in a spectral range, wherein a convolution of the responsivity of the optical detector array and the transmission spectrum of the one or more optical filters has a first peak in mid-wave infrared spectral region between 3-4 microns corresponding to a first absorption peak of methane and a second peak in a long-wave infrared spectral region between 6-8 microns corresponding to a second absorption peak of methane.
47 Citations
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32. An infrared (IR) imaging system for detecting methane, the imaging system comprising:
an optical detection unit comprising; an optical detector array; and one or more optical filters configured to selectively pass light in a spectral range, wherein a convolution of the responsivity of the optical detector array and the transmission spectrum of the one or more optical filters has a first peak in mid-wave infrared spectral region between 3-4 microns corresponding to a first absorption peak of methane and a second peak in long-wave infrared spectral region between 6-8 microns corresponding to a second absorption peak of methane. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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39. An infrared (IR) imaging system configured to detect and identify a target species associated with an absorption spectrum, the IR imaging system comprising:
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an optical detection unit comprising an optical detector array configured to detect IR radiation, the optical detection unit characterized by a spectral response curve defining a responsivity of the optical detection unit to IR radiation across a range of wavelengths, wherein a convolution of the spectral response curve with the absorption spectrum of the target species defines a first peak at a first wavelength and a second peak at a second wavelength different from the first wavelength. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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66. A spectral imaging system configured to image a target species, said system comprising:
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an optical detecting unit comprising an optical detector array configured to capture an image of the scene, the optical detecting unit configured to have increased sensitivity to one or more wavelengths less than 8.3 microns, wherein said spectral imaging system comprises a single channel infrared imaging system, said optical detecting unit providing a single infrared channel, and said target species is methane. - View Dependent Claims (69)
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Specification