Spectroscopic analysis
First Claim
1. An analyser identifying in or verifying or otherwise characterising a sample comprising:
- an electromagnetic radiation source for emitting electromagnetic radiation in at least one beam at a sample, the electromagnetic radiation comprising at least two different wavelengths,a sample detector that detects affected electromagnetic radiation resulting from the emitted electromagnetic radiation affected by the sample and provides output representing the detected affected radiation, anda processor for determining sample coefficients from the output, and identifying or verifying or otherwise characterising the sample using the sample coefficients and training coefficients determined from training samples,wherein the sample and/or training samples comprise a substance in a dilutant with a concentration and the sample coefficients and/or training coefficients are independent of the concentration, andwherein each sample coefficient is determined by;
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Accused Products
Abstract
A method and analyzer for identifying, verifying or otherwise characterizing a sample involves emitting electromagnetic radiation in at least one beam at a sample. The electromagnetic radiation includes at least two different wavelengths. A sample detector detects affected electromagnetic radiation resulting from the emitted electromagnetic radiation affected by the sample and provides output representing the detected affected radiation. A processor determines sample coefficients from the output and identifies, verifies or otherwise characterizes the sample using the sample coefficients and training coefficients determined from training samples. The coefficients reduce sensitivity to a sample retainer variation and/or are independent of concentration.
11 Citations
13 Claims
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1. An analyser identifying in or verifying or otherwise characterising a sample comprising:
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an electromagnetic radiation source for emitting electromagnetic radiation in at least one beam at a sample, the electromagnetic radiation comprising at least two different wavelengths, a sample detector that detects affected electromagnetic radiation resulting from the emitted electromagnetic radiation affected by the sample and provides output representing the detected affected radiation, and a processor for determining sample coefficients from the output, and identifying or verifying or otherwise characterising the sample using the sample coefficients and training coefficients determined from training samples, wherein the sample and/or training samples comprise a substance in a dilutant with a concentration and the sample coefficients and/or training coefficients are independent of the concentration, and wherein each sample coefficient is determined by; - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for identifying or otherwise characterising a sample comprising:
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emitting electromagnetic radiation in at least one beam at a sample, the electromagnetic radiation comprising at least two different wavelengths, detecting affected electromagnetic radiation resulting from the emitted electromagnetic radiation affected by the sample and providing detected output representing the detected affected radiation, determining sample coefficients from the output, and identifying or verifying or otherwise characterising the sample using the sample coefficients and training coefficients determined from training samples, wherein the sample and/or training samples comprise a substance in a dilutant with a concentration and the sample coefficients and/or training coefficients are independent of the concentration, and wherein each sample coefficient is determined by; - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for identifying or verifying or otherwise characterising a sample comprising:
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emitting electromagnetic radiation in at least one beam at a sample, the electromagnetic radiation comprising at least two different wavelengths, detecting the emitted electromagnetic radiation at each wavelength and providing detected output representing the emitted electromagnetic radiation being reference intensity detected at each wavelength, detecting affected electromagnetic radiation resulting from the emitted electromagnetic radiation affected by the sample and providing detected output representing the detected affected radiation being output intensity detected at each wavelength, measuring the temperature of the sample determining sample coefficients from the output, and identifying or verifying or otherwise characterising the sample using the sample coefficients and training coefficients determined from training samples, wherein determining the sample coefficients comprises; eliminating dark current from the output of the reference and output intensities, determining fractional spectral intensities from the reference and output intensities, determining a concentration independent coefficient from the fractional spectral intensities, wherein the training coefficients have be-been determined from data temperature corrected to the temperature of the sample.
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Specification