| 摘要 |
A method for the early detection of sunburn is provided in which the reflection spectrum of the irradiated skin is considered. A color change made perceptible to the human eye is obtained from the specific absorption and reflection behavior. The change is made to occur when a predetermined borderline spectrum is reached. A device is also provided that changes the reflection spectrum of the irradiated skin, which is determined by the specific absorption and reflection behavior, such that the changed reflection spectrum brings about a color change perceptible to the eye when a predetermined borderline spectrum is reached, whereas no color change perceptible to the eye is yet noticeable if the reflection spectrum is unchanged. The device is used with the method including: defining a borderline spectrum by irradiating a skin area of a person with a predetermined radiation dose and measuring the reflection spectrum of the irradiated skin area after the end of the irradiation; defining a target spectrum that is perceived by the eye in a shade deviating from the natural skin color; and determing a transmission, reflection or emission spectrum by forming the quotient from the individual values of the target spectrum divided by the corresponding individual values of the borderline spectrum.
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