Reflected light measuring apparatus

Details Reflected light measuring apparatus Reflected light measuring apparatus

A - Human Necessities

61

B

326/12

A61B 5/00 (2006.01) G01N 21/47 (2006.01)

Patent

CA 1192962

ABSTRACT REFLECTED LIGHT MEASURING APPARATUS The invention concerns a novel apparatus for measuring the reflectance of a coloured area of skin in response to green light as a means for assessing the degree of erythema or pigmentation of the area of skin. The apparatus (shown in partial cross-section in Fig. 2) has a mutually screened, green light emitting diode (10) and photosensitive electrical component (8) (typically a cadmium sulphide photo- resistor or a silicon photodiode), arranged in a holder (1) and connected to conventional electronic circuitry, so that the amount of light reflected by the area of skin and impinging on the component (8) may be measured and then displayed on a voltmeter allowing a quantitative assessment of erythema or pigmentation. The apparatus has both medical, veterinary and cosmetic applications, for example in assessing the response to treatment of inflammation of the skin, or a safe level of exposure to UV light.

408680

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