Method and apparatus for measuring moisture content of skin
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United States of America Patent
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-
Aug 16, 1983
Issued Date -
N/A
app pub date -
May 25, 1978
filing date -
May 25, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There are disclosed a method and an apparatus for measuring moisture content of skin. The skin surface is illuminated with polarized light incident at the Brewster angle. The degree of polarization of the light refracted within the skin and reflected out is measured. The measurement is a function of the refractive index of the skin which, in turn, is a function of the moisture content. To avoid measurement variations due to such things as skin color, output readings are in the form of a ratio of the reflected polarized light intensity to the reflected total light intensity.
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