Calibration source and temperature standard for passive millimetre wave imagers

Chris T. Taylor; Peter Scicluna; Peter Wilkinson; Neil Salmon

doi:10.1117/12.864847

12 October 2010 Calibration source and temperature standard for passive millimetre wave imagers

Chris T. Taylor, Peter Scicluna, Peter Wilkinson, Neil Salmon

Proceedings Volume 7837, Millimetre Wave and Terahertz Sensors and Technology III; 78370N (2010) https://doi.org/10.1117/12.864847
Event: SPIE Security + Defence, 2010, Toulouse, France

Abstract

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.

Citation Download Citation

Chris T. Taylor, Peter Scicluna, Peter Wilkinson, and 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); https://doi.org/10.1117/12.864847

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