Spectrometric assembly and method for determining a temperature value for a detector of a spectrometer
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United States of America Patent
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Issued Date -
Oct 20, 2011
app pub date -
Oct 27, 2009
filing date -
Oct 31, 2008
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Abandoned
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Abstract
The invention relates to a spectrometric assembly and method for determining a temperature value for a detector of a spectrometer. It is conventional to record the detector temperature in an optoelectronic detector using a thermal temperature sensor in order to compensate for temperature fluctuations. Due to the finite distance between the detector and the temperature sensor, the accuracy of the temperature detection is limited. According to the invention, the detector temperature should be recordable at high accuracy and with little effort. In addition to means for spectral division of incident tight and an optical detector for spectrally resolved detection of a spectral range of the divided light, a second optical detector is provided for detection of a partial range of this spectral range as a reference detector, wherein sensitivity of the reference detector is substantially temperature-independent. The ratio of the signals of both detectors is a highly accurate measurement for the relative temperature of the first detector due to the temperature independence of the sensitivity of the reference detector, and can be determined with little effort.
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