Infrared thermal imaging camera to measure low temperature thermal fields

Author:

Gordiyenko E.1ORCID,Fomenko Yu1ORCID,Shustakova G.1ORCID,Kovalov G.2ORCID,Shevchenko S.1ORCID

Affiliation:

1. B.Verkin Institute for Low Temperature Physics and Engineering, NAS of Ukraine 1 , Nauky ave. 47, 61103 Kharkiv, Ukraine

2. Institute for Problems of Cryobiology and Cryomedicine, NAS of Ukraine 2 , Pereyaslavska str. 23, 61016 Kharkiv, Ukraine

Abstract

To measure low-temperature thermal fields, we have developed a single-element cooled thermal imaging camera for a spectral range of 8–14 μm with an internal shutter for radiometric calibration. To improve the accuracy of measuring the temperature of cold objects, we used a shutter with a combined emissivity as an internal reference source of radiation at the input of the device optical unit. With this aim a small mirror was fixed in the center on its surface covered black, thereby ensuring an efficient reflection of radiation in a wide spectral range of wavelengths. When processing the signal for each pixel of the thermal image, the differential value of the detector response to the shutter blackened and mirror areas was used as a reference. A relative measurement error of 3% was obtained for the studied objects with a temperature of −150 °C. The device was successfully used for remote study of thermal field dynamics during freeze-thawing of biological tissues in vivo.

Funder

National Research Foundation of Ukraine

Publisher

AIP Publishing

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