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High-precision flat-plate reference infrared radiator using perfect blackbody composite with a microcavity structure

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Abstract

Onsite reference infrared radiators are used to correct thermal imagers for noncontact fever screening in real time. We have developed a flat-plate reference radiator of the highest accuracy to enhance reliability of the fever screening. Our contact-durable blackbody composite with good heat transfer, which has a microcavity structured surface offering high emissivity (${\gt}{0.999}$), was employed for the emissive surface of the reference radiator. Evaluation of the developed reference radiator regarding the spectral emissivity, in-plane uniformity, and temperature stability demonstrated an unprecedentedly small uncertainty of 0.10°C for the radiance temperature (95% level of confidence).

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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