Patent Document ID: 10066993
Application ID: 15620693
Patent Flag: 1

Claim One:
1. An analyser for identifying or verifying 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, the source comprising multiple narrowband sources: integrated on a substrate, arranged on a carousel, arranged to emit radiation to a beam splitter, arranged to emit radiation to a prism, or arranged to emit radiation through separate fibre optic cables, 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, a processor for determining sample coefficients from the output, and identifying or verifying the sample using the sample coefficients and training coefficients determined from training samples, a modulator such that the emitted electromagnetic radiation at the sample is modulated electromagnetic radiation and prior to determining the sample coefficients the processor extracts the desired spectral component from the intensity at each of the at least two wavelengths to eliminate the dark current, and a temperature sensor to measure the temperature of the sample and provide temperature output to the processor, wherein the processor corrects the desired spectral components of the training coefficients at the at least two wavelengths to the temperate of the sample, wherein the temperature is corrected according to: I ⁡ ( T t ) = I ⁡ ( T b ) + dI dT ⁢ Δ ⁢ ⁢ T ( 1 ) where, I is the intensity of affected electromagnetic radiation detected by a detector at a particular wavelength for a sample, T t is the temperature of the training sample when the affected electromagnetic radiation was detected at that wavelength, T b is the temperature of the unknown sample when the affected electromagnetic radiation was detected at that wavelength, ΔT=T t −T b is the sample temperature difference between the training sample temperature and unknown sample temperature, and dI dT is the slope or the linear relationship of between measure intensity and temperature for a sample at a given wavelength.