A skin erythema meter

Harri Kopola, Arto Lahti, Risto Myllylä, Matti Hannuksela

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)


    The skin erythema meter is a fibre-optic, dual wavelength reflectance meter which measures the reflectance of the skin on two wavelengths, one the blood/haemoglobin absorption band (555 nm) and another a reference (660 nm). The instrument consists of a fibre-optic sensor head, a microprocessor-based control and analysis unit and a plotter, and it presents the relation between the measured reflectance results in terms of a reflectance index (R(555nm):R(660nm)). The measurement cycle, including printing, takes 5 seconds. Stability tests on the erythema meter (constant distance, reference object) showed the standard deviation of the reflectance index to be +/- 0.1%, while that in repeatability tests was <+1- 0.5% for skin and <+1- 0.2% for paper with hand-held positioning and repetition. The dynamic change in the reflectance index was about 30% with strong irritation. Results of various irritation test series on human skin are also presented. Finally, the performance and applicability of the skin erythema meter with respect to allergy test procedures, irritancy testing and measurement of UV-induced erythema are discussed.
    Original languageEnglish
    Title of host publicationOptical Fibers in Medicine V
    EditorsAbraham Katzir
    PublisherInternational Society for Optics and Photonics SPIE
    Publication statusPublished - 1990
    MoE publication typeA4 Article in a conference publication
    EventOE/LASE '90 - Los Angeles, United States
    Duration: 14 Jan 199014 Jan 1990

    Publication series

    SeriesProceedings of SPIE


    ConferenceOE/LASE '90
    Country/TerritoryUnited States
    CityLos Angeles


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