Abstract
A SIMPLE thermal image-converter can be made, using the dependence upon temperature of the absorption threshold in a semiconductor. When a sample of a suitable material is viewed by transmitted monochromatic light at a wave-length near the threshold, any variations in temperature appear as differences in the transmitted intensity. If a scene in which there are objects of various temperatures and emissivities is focused on the semiconductor, a visible picture will result.
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HARDING, W., HILSUM, C. & NORTHROP, D. A New Thermal Image-Converter. Nature 181, 691–692 (1958). https://doi.org/10.1038/181691a0
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DOI: https://doi.org/10.1038/181691a0
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