Patent ID: 11972595
Assignee: TOTALENERGIES SE
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The gas detector of claim 1, wherein the image processing unit is adapted for evaluating, for each analysis band of the at least one analysis band, the radiation transmission coefficient which relates to the analysis band and which is attributed at least partially to the target gas, according to the equation:

τband_1=1+(TBapparent_1−TBbackground_1)/(TBbackground_1−Tambient)

where:
τband_1 is the value of the radiation transmission coefficient which relates to the analysis band, indicated by band_1, and which is attributed at least partially to the target gas present in the part of the field-of-view;
Tambient is the ambient temperature value which is provided by the first acquisition means;
TBbackground_1 is a value of the background brightness temperature values, which are provided by the second acquisition means and which are intended to be attributed to the background scene elements contained in the part of the field-of-view, for the analysis band band_1; and
TBapparent_1 is the at least one apparent brightness temperature value, which corresponds to the spectral image captured for the analysis band band_1, in the part of the field-of-view.