Measurement of Spectral Emissivity near Room Temperature with a Vacuum Blackbody Using a Cryogenic Refrigerator

Autor:	Yoshinari Ishido, Hideyuki Minato
Rok vydání:	2009
Předmět:	Temperature control Materials science business.industry Infrared Refrigerator car Thermodynamics Infrared spectroscopy symbols.namesake Fourier transform Optics Emissivity symbols Optoelectronics Black-body radiation Diffuse reflection Electrical and Electronic Engineering business
Zdroj:	Journal of Light & Visual Environment. 33:70-81
ISSN:	1349-8398 0387-8805
DOI:	10.2150/jlve.33.70
Popis:	A new type of vacuum blackbody containing both a blackbody cavity and a solid material sample was fabricated using a cryogenic refrigerator. It was to construct a highly sensitive infrared spectral-radiation measurement system using a programmable temperature control device, a Fourier transform infrared spectrophotometer, and two mercury-cadmium-telluride (MCT) detectors. Evaluation showed that the temperature of the blackbody cavity wall was accurately set within ±0.2 K for 173 to 373 K and that the nonlinearity of the system response output at 173 to 373 K was within 0.8% with the proper use of the two MCT detectors. An emissivity comparison experiment using black paint (No. 1) showed that the proposed blackbody cavity method had a coincidence within 0.015 of a diffuse reflectance measuring method at 5 to 11.6 μm. For ceramics, the emissivity temperature dependence for alumina and zirconia at 273 to 373 K was within ±0.06 and ±0.04, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3eb84b1ec8469993973f6ab24bd02e0d https://doi.org/10.2150/jlve.33.70 Zobrazit plný text záznamu