Patent ID: 7460226
Filing Date: 2008-12-02
Classification: G01J,G01N

Abstract:
1. An analyzer or spectrophotometer for the detection of material in a sample comprising: a source of radiation adapted to direct said radiation at least at said sample, the radiation incident on or affected by said sample able to be varied by varying the intensity of the said source radiation; a detector for detecting at least radiation affected by said sample, said detector having a spectral response able to be varied by biasing the detector and an output depending on radiation incident thereon and said spectral response; a controller or processor receiving said output, configured or programmed to: vary the spectral response of said detector using biasing to produce a sweep of detector spectral responses, each spectral response having a cut off wavelength dependent on the intensity of incident radiation and biasing; for each detector spectral response within the sweep of spectral responses, vary the intensity of said source radiation to produce a sweep of source radiation with a range of intensities directed at said sample; for each detector spectral response within the sweep of spectral responses, obtaining output from the detector resulting from the detection of each of the source radiation intensities affected by the sample, the detector output for each intensity being influenced by the detector's cut off wavelength at that intensity for that spectral response, wherein the combination of the detector's outputs at each of the intensities for the sweep of source radiation for each of the spectral responses in the detector sweep provide a combined set of data across a spectrum; and determine a characteristic of said sample based on said combined set of data.