12 October 2010 Calibration source and temperature standard for passive millimetre wave imagers
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This paper discusses a practical and affordable approach to the accurate calibration of electronic beam-forming passive millimetre-wave imagers. With the aim of calibrating imagers with radiometric sensitivities ΔT < 1 K, we have constructed a thermal radiation source at ambient temperature that fills the imager field-of-view at close range and can support several controllable thermal radiation sources to provide absolute and differential radiation temperature standards. Using a variety of temperature sensors, which have been extensively cross-calibrated against each other and a commercially provided calibration standard that is accurate to < 0.1 K, we have achieved absolute and relative calibration temperature uncertainties of less than 0.25 K.
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Chris T. Taylor, Chris T. Taylor, Peter Scicluna, Peter Scicluna, Peter Wilkinson, Peter Wilkinson, Neil Salmon, Neil Salmon, } "Calibration source and temperature standard for passive millimetre wave imagers", Proc. SPIE 7837, Millimetre Wave and Terahertz Sensors and Technology III, 78370N (12 October 2010); doi: 10.1117/12.864847; https://doi.org/10.1117/12.864847

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