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US 6,132,681 AGranted
Disposable dosimeter for sun radiation
AssigneeSkyrad Ltd.
InventorsOri Faran, Ezra Natan, Dmitry Lastochkin
Life of this patent
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AssigneeSkyrad Ltd.
InventorsOri Faran, Ezra Natan, Dmitry Lastochkin
Estimating the term…
A disposable dosimeter for sun radiation comprising a matrix with at least one active chemical compound distributed therein, capable of changing its original color to a new color due to a chemical reaction induced by exposure to UV radiation, said matrix made of a material having transparency sufficient for visual detection the change of the original compound's color to the new color, said matrix containing at least one absorbing compound capable of absorbing the UV radiation, said active chemical compound being capable of changing its color after exposure to UV radiation with an efficacy corresponding to at least 1 MED, said UV radiation being accumulated during at least 15 minutes of exposure and said active chemical compound having a resistance to change the new color neither during exposure to temperatures up to 50.degree. C., nor during exposure to visible light.
A disposable dosimeter for sun radiation comprising a matrix having at least one active chemical compound and a color enhancing agent distributed therein, said active chemical compound, when exposed to UV radiation at a dosage of at least 1 MED, irreversibly changes color, whereas said color enhancing agent is an organic pigment and said color enhancing agent increases and retains the contrast of the color change of said active chemical compound up to 50.degree. C.
Dependencies are inferred from the claim text.