Journal
MEASUREMENT
Volume 117, Issue -, Pages 429-434Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2017.12.023
Keywords
Thermal imaging; Small-scale; Sub-millimetre
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Quantitative thermal imaging has the potential of reliable temperature measurement across an entire field-ofview. This non-invasive technique has applications in aerospace, manufacturing and process control. However, robust temperature measurement on the sub-millimetre (30 mu m) length scale has yet to be demonstrated. Here, the temperature performance and size-of-source (source size) effect of a 3-5 mu m thermal imaging system have been assessed. In addition a technique of quantifying thermal imager non-uniformity is described. An uncertainty budget is constructed, which describes a measurement uncertainty of 640 mK(k = 2) for a target with a size of 10 mm. The results of this study provide a foundation for developing the capability for confident quantitative sub-millimetre thermal imaging.
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