Relation of dose measurements to indexing protective devices for exposure to solar radiation

Cho-Fai Wong; R. A. Fleming; B. W. Thomas

doi:10.1117/12.180822

21 July 1994 Relation of dose measurements to indexing protective devices for exposure to solar radiation

Cho-Fai Wong, R. A. Fleming, B. W. Thomas

Proceedings Volume 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards; (1994) https://doi.org/10.1117/12.180822
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

This paper reports preliminary results of using Polysulphone to study scattered solar UV radiation underneath a shade cloth. Passive dosimeters, (Polysulphone) instead of a single UV meter were used to measure UVR-exposure to a selected target area on a minikin. Results show that the UV-dosimeters can be used to investigate the efficacy of shade structures without alteration of the field of solar radiation. The UV-transmittance of the shade cloth was measured to be 0.14. The ratio of the shaded dose to the unshaded dose at ten selected sites of the minikin was found to vary from 0.16 to 0.86 for the shade structure in the present experiments. A dosimetric model was proposed to estimate the effective dose to the facial area based on the measurement in five zones of the face. The result yields an 'average' ratio of the shaded dose to the unshaded dose of 0.31 as compared with the transmittance 0.14. They correspond to the protective factor of the shade structure by more than 100%. The possibility of including the effect of scattered radiation in the index for classification of UV-protective devices will be discussed.

Citation Download Citation

Cho-Fai Wong, R. A. Fleming, and B. W. Thomas "Relation of dose measurements to indexing protective devices for exposure to solar radiation", Proc. SPIE 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards, (21 July 1994); https://doi.org/10.1117/12.180822

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