Articles | Volume 11, issue 1
https://doi.org/10.5194/jsss-11-61-2022
https://doi.org/10.5194/jsss-11-61-2022
Regular research article
 | 
23 Feb 2022
Regular research article |  | 23 Feb 2022

Particularities of pyroelectric detectors in absolute measurements of chopped radiation shown for the example of a spectral responsivity calibration in the near- and mid-infrared spectral range at two primary radiometric standards

Tobias Pohl, Peter Meindl, Jörg Hollandt, Uwe Johannsen, and Lutz Werner

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Cited articles

Budzier, H. and Gerlach, G.: Thermische Infrarotsensoren – Grundlagen für Anwender, WILEY-VCH, Weinheim, Germany, ISBN 10 3-527-40960-2, 2010. 
Gentile, T. R., Houston, J. M., Eppeldauer, G., Migdall, A. L., and Cromer, C. L.: Calibration of a pyroelectric detector at 10.6 µm with the National Institute of Standards and Technology high-accuracy cryogenic radiometer, Appl. Optics, 36, 3614–3618, 1997. 
InfraTec: Pyroelectric detectors: Behaviour of detector characteristics at static and dynamic temperature condition, Application Library, 2004. 
InfraTec: Pyroelectric detector LIE-651, datasheet, 2015. 
Martin, J. E., Fox, N. P., and Key, P. J.: A Cryogenic Radiometer for Absolute Radiometric Measurements, Metrologia, 21, 147–155, 1985. 
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Short summary
The Physikalisch-Technische Bundesanstalt calibrated pyroelectric detectors at two independent primary radiometric standards regarding their spectral responsivity. The SI traceable measurements in the spectral range between 1.5 and 14 µm are consistent within the measurement uncertainty in the range of 1 % and 14 %. The importance of the correct read-out of lock-in amplifiers and the accurate consideration of the temporal shape of the chopped radiant flux behind the chopper wheel are shown.