Radiant energy – Invisible radiation responsive nonelectric signalling – Optical change type
Patent
1990-12-11
1992-05-26
Fields, Carolyn E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Optical change type
2504721, G01J 150
Patent
active
051171163
ABSTRACT:
A device for monitoring UV radiation received by the skin comprises a housing. Adhesive on a face of the housing secures the device to the skin. A patch of irreversible UV sensitive material which changes color on being subjected to UV radiation is applied to an inner surface of the housing and receives UV radiation reflected from the skin. The color of the UV sensitive patch is compared with reference colors on the housing for determining the quantity of UV radiation to which the skin has been subjected.
REFERENCES:
patent: 3194963 (1965-07-01), McKee
patent: 3449572 (1989-06-01), Sylvester et al.
patent: 3903423 (1975-09-01), Zweig
patent: 4818491 (1989-04-01), Fariss
Bannard John E.
Maguire Dennis D.
Cybrandian Limited
Fields Carolyn E.
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