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

Yuhei Shimizu, Masatoshi Imbe, Kenji Godo

|February 24, 2022

Summary

A novel reference radiator enhances real-time fever screening accuracy. This high-emissivity device achieves a minimal uncertainty of 0.10°C for radiance temperature, improving thermal imager reliability.

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Area of Science:

Thermography and Infrared Technology
Medical Device Development
Materials Science

Background:

Accurate noncontact fever screening is crucial for public health surveillance.
Existing thermal imagers require reliable onsite reference radiators for real-time correction.
Enhancing the accuracy and reliability of these reference radiators is essential.

Purpose of the Study:

To develop a highly accurate flat-plate reference radiator for real-time thermal imager correction.
To improve the reliability of noncontact fever screening systems.
To achieve unprecedentedly small uncertainty in radiance temperature measurements.

Main Methods:

Development of a contact-durable blackbody composite with a microcavity structured surface for high emissivity (>0.999).
Integration of the composite material into a flat-plate reference radiator design.
Comprehensive evaluation of spectral emissivity, in-plane uniformity, and temperature stability.

Main Results:

The developed reference radiator exhibits high emissivity (>0.999) due to its microcavity structured surface.
Evaluation demonstrated excellent spectral emissivity, in-plane uniformity, and temperature stability.
An unprecedentedly small uncertainty of 0.10°C for radiance temperature (95% confidence) was achieved.

Conclusions:

The developed reference radiator significantly enhances the accuracy and reliability of noncontact fever screening.
The novel blackbody composite material and radiator design meet high-performance standards.
This advancement contributes to more dependable fever detection in real-time applications.