Thermogram of a thermal shadow

Thermogram of a thermal shadow

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Caption: Thermogram of a thermal shadow. A man's hand was placed flat on a wooden surface for about a minute. After the hand is removed, the surface remains warmer than surrounding and keeps the thermal imprint or shadow for some time. Thermography is a technique for visualizing the temperature of objects by recording the thermal emission at infrared wavelengths. This image was acquired with a specialized camera that uses a focal-plane array of vanadium oxide microbolometers as a sensor. It is sensitive to electromagnetic radiation in the wavelength range of 8 to 14 micron. The camera produces a 320x240-pixel image where different colours correspond to different temperatures.

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Keywords: digital infrared thermal imaging, electromagnetic radiation, hand, handprint, heat, heat radiation, imaging, imprint, infrared, ir, radiation, technology, temperature, thermal, thermal radiation, thermal shadow, thermogram, thermograph, thermography

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