Method and apparatus for radiation encoding and analysis
3 Assignments
0 Petitions
Accused Products
Abstract
Method and apparatus for analyzing radiation using analyzers and employing the spatial modulation of radiation dispersed by wavelength or along a line.
64 Citations
46 Claims
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1-32. -32. (canceled)
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33. An encoded filter-correlation radiometer for measuring a sample, comprising:
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at least one source providing broad-band radiation in at least one spectral range;
at least two target wavelength filters, each said target wavelength filter having substantial optical transmission attenuation in said spectral range, said optical transmission attenuation a function of one or more spectral properties of a corresponding target analyte in a sample;
at least one reference wavelength filter, said reference filter having substantially less optical transmission attenuation in said spectral range as compared to said target wavelength filter;
a two dimensional spatial radiation modulator rotated about a rotation axis and positioned in said plane so that said encoding axis is substantially along a radial axis, said modulator having at least three radiation encoding filters at different radii from said rotation axis for modulating intensities of radiation from said source as said modulator is rotated about said rotation axis;
optics collecting and directing said radiation to the modulator so that said radiation forms at least three sub-images along a radial axis of the modulator, each said sub-image corresponding to radiation filtered by one of the target wavelength filters or one of the reference wavelength filter(s), said sub-images modulated by said radiation encoding filters to provide a modulated beam comprising at least two target components comprising radiation that has passed through the target filters and at least one reference component comprising radiation that has passed through the at least one reference filter;
a detector providing an output in response to the modulated beam, wherein the radiation from the at least one radiation source and reaching the detector interacts with said sample prior to reaching the detector; and
a computer analyzing signals generated by said detector in response to said encoded beam to measure characteristics of the sample. - View Dependent Claims (34, 35, 36, 37, 38)
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39. An encoded filter-correlation radiometer for measuring a sample, comprising:
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at least one source providing broad-band radiation in at least one spectral range;
at least one target and reference wavelength filter pair, said target wavelength filter having substantial optical transmission attenuation in said spectral range, said optical transmission attenuation a function of one or more spectral properties of a corresponding target analyte in a sample, said reference wavelength filter having substantially less optical transmission attenuation in said spectral range as compared to said target wavelength filter;
a two dimensional spatial radiation modulator rotated about a rotation axis and positioned in said plane so that said encoding axis is substantially along a radial axis, said modulator comprising a substrate and at least one radiation filter pair, said pair comprising two radiation filters located at different radii from said rotation axis, each of said filters modulating the intensity of radiation from said source, said filters having substantially complementary modulation functions, said filters producing in response to said filtered components a single encoded component where a characteristic of said encoded component is determined by the relative intensities of radiation incident on said filters comprising said pair, as said modulator is rotated about said rotation axis;
optics collecting and directing said radiation to the modulator so that said radiation forms at least one pair of sub-images along a radial axis of the modulator, each pair of said sub-images corresponding to radiation filtered by a corresponding target and reference wavelength filter pair and modulated by a corresponding said radiation filter pair to provide a modulated beam comprising at least one target-reference pair component;
a detector providing an output in response to the modulated beam, wherein the radiation from the at least one radiation source and reaching the detector interacts with said sample prior to reaching the detector; and
a computer analyzing signals generated by said detector in response to said encoded beam to measure characteristics of the sample. - View Dependent Claims (40, 41, 42, 43, 44, 45)
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46-70. -70. (canceled)
Specification