Patent ID: 7693261
Filing Date: 2010-04-06
Classification: G01N,G01V

Abstract:
1. A method of obtaining radiation transmission data of an object comprising the steps of: providing a radiation source and a radiation detector system spaced therefrom to define a scanning zone therebetween, the detector system being capable of detecting and collecting spectroscopically resolvable information about incident radiation; collecting a dataset of information about radiation incident at the detector and hence transmissivity of an object in the scanning zone at at least one scanning position from radiation transmitted through the object and received at the detector system; and resolving each such dataset spectroscopically across a plurality of frequency bands within the spectrum of the source; wherein at least one of the said plurality of frequency bands corresponds to a characteristically scattered wavelength of a target species to be identified, and wherein the absence of or substantial reduction in a transmitted signal intensity at the frequency band is interpreted as the presence of the said target species.