Miniaturized black body radiator for IR-detector calibration — Design and development

Nowadays very often IR-thermography is used to analyze the temperature on electronic device surfaces. To measure the absolute surface temperature correctly, the IR-camera detector has to be calibrated with an corresponding evaluation software using a black body calibration device. Commercially available black radiators are heavyweight and a calibration of macro-lenses is not possible due to mismatch of the macro lens diameter and the structural design of the radiator. This paper describes the design and realization of a mobile, miniaturized black body calibration device (mass ~ 500 g) which supports macro lenses as well. To realize a temperature range of -5°C to 130°C, a Peltier element as cooling source and a flip-chip mounted thermal test die (TTD) as black radiator heat source, with an including temperature measuring instrument, were used. First temperature stability and calibration tests for the new TTD black radiator show a suitable resolution of 0.1 K. An verification with a commercially available calibration device was done.