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Infrared reflectance spectroscopy and thermographic investigations of the Shroud of Turin

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Abstract

In this paper we present the results of the IR investigations of the controversial Turin Shroud. Reflectance spectroscopy in the 3–5- and 8–14-μm bands was attempted in situ using commercial equipment with moderate success. Spectral comparisons are made between laboratory reflectance data and selected Shroud features. Infrared thermographic imaging was accomplished with an enhanced contrast technique using external illumination. Due to the spectral similarities of most features observed, we show that the results are inconclusive. The IR imagery yielded results that are consistent with expectations with no anomalies observed.

© 1980 Optical Society of America

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