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Direct comparison between the angular distributions of the erythemal and eye-damaging UV irradiances: A pilot study

Paper ID Volume ID Publish Year Pages File Format Full-Text
30939 44518 2011 10 PDF Available
Title
Direct comparison between the angular distributions of the erythemal and eye-damaging UV irradiances: A pilot study
Abstract

Several broadband ultraviolet (UV) radiation angular distribution investigations have been previously presented. As the biologically damaging effectiveness of UV radiation is known to be wavelength dependent, it is necessary to expand this research into the distribution of the spectral UV. UV radiation is also susceptible to Rayleigh and Mie scattering processes, both of which are completely wavelength dependent. Additionally, the majority of previous measurements detailing the biologically damaging effect of spectral UV radiation have been oriented with respect to the horizontal plane or in a plane directed towards the sun (sun-normal), with the irradiance weighted against action spectra formulated specifically for human skin and tissue. However, the human body consists of very few horizontal or sun-normal surfaces. Extending the previous research by measuring the distribution of the spectral irradiance across the sky for the complete terrestrial solar UV waveband and weighting it against erythemal, photoconjunctivital and photokeratital action spectra allowed for the analysis of the differences between the biologically effective irradiance (UVBE) values intercepted at different orientations and the effect of scattering processes upon the homogeneity of these UVBE distributions. It was established that under the local atmospheric environment, the distribution profile of the UVBE for each biological response was anisotropic, with the highest intensities generally intercepted at inclination angles situated between the horizontal and vertical planes along orientations closely coinciding with the sun-normal. A finding from this was that the angular distributions of the erythemal UVBE and the photoconjunctivital UVBE were different, due to the differential scattering between the shorter and longer UV wavelengths within the atmosphere.

Keywords
Solar UV; Ultraviolet; Angular; Erythemal; Spectroradiometer
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Direct comparison between the angular distributions of the erythemal and eye-damaging UV irradiances: A pilot study
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 102, Issue 2, 7 February 2011, Pages 146–155
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us