Method and apparatus for measuring moisture content of skin

Details Method and apparatus for measuring moisture content of skin Method and apparatus for measuring moisture content of skin

1978-05-25

1983-08-16

Howell, Kyle L.

Surgery

Truss

Pad

A61B 500

Patent

active

043985416

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.

REFERENCES:
patent: 3205355 (1965-09-01), Ehlert
patent: 3283644 (1966-11-01), Saltzman
patent: 3355980 (1967-12-01), Mathias
patent: 3525803 (1970-08-01), Smart
patent: 3572938 (1971-03-01), Bradford
patent: 3612689 (1971-10-01), Liskowitz
patent: 4015127 (1977-03-01), Sharkins
Biedermann, E., "Measuring the Thickness of Thin Transparent Films", IBM Tech. Discl. Bulletin, vol. 14, No. 3, Aug. 1971, pp. 967-968.

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