New radiation thermometer for near room temperature

• Published in: Measurement : journal of the International Measurement Confederation Vol. 16; no. 4; pp. 257 - 263
• Main Authors: IUCHI, T, JONO, A
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1995; Elsevier
• Subjects: Emissivity; Exact sciences and technology; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Physics; Radiation thermometer; Radiation thermometry; Sensor; Stray radiation; Thermal instruments, apparatus and techniques; Thermometry; Emissivity; Radiation thermometry; Stray radiation; Radiation thermometer; Sensor; Thermometers; Semiconductor detectors; Cadmium tellurides; Ternary compounds; Theoretical study; Signal-to-noise ratio; Mercury tellurides; Experimental study
• ISSN: 0263-2241; 1873-412X
• DOI: 10.1016/0263-2241(95)00039-9

The authors have developed a new radiation thermometer for the measurement of near room temperature with high signal-to-noise ratio ( S N ). The thermometer, utilizing an HgCdTe semiconductor sensor, is compact and insensitive to temperature changes of the surroundings. Its major breakthrough owes much to the fact that the sensor is cooled and controlled by Peltier thermoelectric devices and that the sensor serves as reference radiator. A well designed optical system with a chopper and a concave mirror shuts off stray radiation, thus improving the S N . On-line experiments in a steel sheet manufacturing process using a prototype thermometer proved the validity of this new radiation thermometer.