Abstract
A pyroelectric radiometer is so designed that the output of the detector is null for equivalent radiation and electric powers. The sensing element is comprised of two poled crystal plates joined together such that the polarity of domains reverses across the junction. An auxiliary pyroelectric detector is used to provide in-phase electric signal for producing electric heating at the back electrode of the compound detector. The system has been used for absolute measurement of infrared radiation.
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Pradhan, M.M., Garg, R.K. A null detecting system for absolute measurement of infrared radiation. Int J Infrared Milli Waves 4, 969–977 (1983). https://doi.org/10.1007/BF01009322
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DOI: https://doi.org/10.1007/BF01009322