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Simultaneous monitoring of reflection artifacts with an infrared camera at a 7.5 – 13 μm (a) and a camera at a 2 – 5 μm (b) wavelength range. Note the stronger expression of the artifact (white-red area on the foot) at a wavelength of 2 – 5 μm. The moxa-cigar is shown as the white circular area next to the leg. For further details see Fig. 2.
