Patent ID: 7656521

Claim:
A spectroscopic device comprising: a detector for receiving light from a sample and a comparison material, wherein the sample and the comparison material were simultaneously stimulated, said detector producing a first signal indicative of a test spectral line or spectrum of at least one component contained in the sample, and producing a second signal indicative of a comparison spectral line or spectrum of the comparison material; an analytical unit that compares the second signal indicative of the comparison spectral line or spectrum produced using the detector with an ideal comparison spectral line or spectrum to calculate a transfer function derived from the comparison spectral line or spectrum and the ideal comparison spectral line or spectrum, the transfer function derived independently of the sample spectral line or spectrum, and that applies the transfer function to the test spectral line or spectrum to calculate a corrected test spectral line or spectrum; and wherein the ideal comparison spectral line or spectrum is generated based on prescribed values of parameters selected from the group consisting of: temperature, pressure, mechanical wear of the spectroscopic device, the setting of the spectroscopic device, and points of measurement.