Measurement of the Total Normal Emissivity of Skin Without The Need For Measuring Skin Temperature

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Abstract
A new method of measuring the total normal emissivity of excised human skin has been developed. The method is based on the fact that the rate of transfer of radiant heat between the skin and the radiometer, which is being used to measure the radiation, depends not only on the temperature of the skin, but also on the temperature of the radiometer. The emissivity of the skin can be extracted from the relationship between the radiometer''s output and its temperature, the temperature of the skin being kept constant. The method has the advantage of not requiring any actual measurement of the skin surface temperature. The standard error of single measurements of emissivity made by this method was about 0.01. The repeatability of the emissivity value of the same sample on successive days was about 1%.

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