Solar UVA exposures

Alfio V. Parisi; Michael G. Kimlin

doi:10.1117/12.614608

10 September 2005 Solar UVA exposures

Alfio V. Parisi, Michael G. Kimlin

Proceedings Volume 5886, Ultraviolet Ground- and Space-based Measurements, Models, and Effects V; 58860O (2005) https://doi.org/10.1117/12.614608
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Exposures to UVA radiation (320 − 400 nm) have been linked to increasing the risk of skin cancer, premature skin photoageing and skin wrinkling. The relative proportion of the UVA irradiances in the solar spectrum changes with time of day and season. Material such as window glass found in offices, homes and motor vehicles acts as a barrier to the shorter solar UVB wavelengths (280 - 320 nm) and transmits some of the longer UVA wavelengths (dependent on the type of glass). As a result, the spectrum of the filtered UV transmitted through the material may be substantially different from that of the unfiltered solar UV spectrum. This results in a change in the relative ratio of UVA to UVB irradiances and a consequent change in the biologically damaging UV exposures. For these environments where the UVB wavelengths have been removed and the UVA wavelengths are still present, it is necessary to consider the erythemal irradiances due to these UVA wavelengths only. This paper investigates the times taken for an exposure of 1 SED (standard erythemal dose) due to the UVA wavelengths.

Citation Download Citation

Alfio V. Parisi and Michael G. Kimlin "Solar UVA exposures", Proc. SPIE 5886, Ultraviolet Ground- and Space-based Measurements, Models, and Effects V, 58860O (10 September 2005); https://doi.org/10.1117/12.614608

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