APPARATUS AND METHOD FOR THE SPECTRAL DIAGNOSIS OF SUBSTANCES AND/OR SURFACES
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United States of America Patent
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Issued Date -
Jun 10, 2010
app pub date -
Jan 31, 2008
filing date -
Jan 31, 2007
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Abandoned
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Abstract
An apparatus for the spectral diagnosis of substances and/or surfaces includes a radiation source which can be variably adjusted over a predetermined spectral range and whose emitted radiation is focused onto a sample to be examined, wherein a first optical sensor unit detects a radiation component, which is influenced by the sample to be examined, as a useful signal and forwards it to an evaluation and control unit, and to an associated method. The radiation source comprises a light-emitting diode with a predetermined emission wavelength which can be varied between a first emission wavelength and a second emission wavelength by a dynamic change in temperature of the light-emitting diode within the predetermined spectral range, wherein a second optical sensor unit detects a component of the emitted radiation as a reference signal and forwards it to the evaluation and control unit for error compensation purposes.
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