1.2 - Spectrally resolved radiometric characterisation and calibration using a supercontinuum laser in the NIR
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings IRS² 2015
- I1 - Calibration and Accuracy
- L. Bünger, R. Taubert, K. Anhalt - Physikalisch-Technische Bundesanstalt (PTB), Berlin (Germany)
- 895 - 898
In future, the “mise en pratique for the definition of the kelvin”  will allow a temperature scale to be realised and disseminated using methods of primary thermometry, such as absolute radiometry.
Here, a method is presented for the determination of the absolute spectral radiance responsivity of the measuring device, e.g. a radiation thermometer or a thermal imager. To increase the signal-to-noise ratio a supercontinuum laser system (0.45 μm - 2.4 μm) is used. For radiometric applications on a high metrological level the laser system was characterised and subsequently stabilised and drift compensated to better than 0.1 % per hour.
Furthermore, this laser was used for detector characterisation regarding the non-linearity and size-ofsource effect (SSE). Additionally to single detector applications, the photo-response-non-uniformity
(PRNU) for focal-plane-array (FPA) detectors can be determined. Together with dedicated wavelength
selecting components, the supercontinuum laser enables the determination of all these characteristics
with respect to their wavelength dependencies.