High-energy visible light transparency and ultraviolet ray transmission of metallized rescue sheets

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作者
Markus Isser
Hannah Kranebitter
Erich Kühn
Wolfgang Lederer
机构
[1] Medical Division,
[2] Mountain Rescue Tyrol,undefined
[3] Medical University of Innsbruck,undefined
[4] Department of Anesthesiology and Critical Care Medicine,undefined
[5] Private Polytechnic Institute of the State of Tyrol - College of Optometry,undefined
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摘要
Metallized rescue sheets are essential components in first aid boxes and professional emergency equipment for provision of thermal insulation. We investigated the transparency for visual light and the transmission of ultraviolet radiation and high-energy visible light in the violet/blue band of rescue sheets under laboratory conditions to evaluate the potential of blocking solar radiation during outdoor activities. An experimental study was performed using two commercially available brands of rescue sheets. Transmission of visible light and ultraviolet light was assessed by optometry. Single-layer transparency for visible light was between 1% and 8%. Transmission for high-energy visible light in the violet/blue band and ultraviolet A rays was between 1% and 13% for the single layer and between 0% and 3% for the double layer of the rescue sheets. Transmission for ultraviolet B rays afforded by each tested rescue sheet brand was between 0% and 1% for the single layer. Double-layer rescue sheets blocked 100% of ultraviolet B radiation. In conclusion, single layer rescue sheets were sufficiently permeable for visible light and diminished transmission for ultraviolet radiation and high-energy visible light in the violet/blue band to potentially protect from solar radiation if used for facial protection and as makeshift sun googles.
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