Disinfection of Transparent Screens by Side-Coupled UVA LED Radiation
نویسندگان
چکیده
(1) Background: Applications using touch screens are increasingly deployed in medical facilities, as well public areas. When touching the display with fingers, potentially pathogenic microorganisms such methicillin-resistant Staphylococcus aureus (MRSA) can be transmitted. An automated process to decontaminate device between users would highly useful. (2) Methods: Thin glass plates were superficially contaminated non-pathogenic carnosus a controlled manner. Subsequently, UVA radiation of 400 or 380 nm was laterally coupled into plate, which acted light guide. Contact agar recorded change staphylococci concentration over time. Additionally, emitted by measured and potential risk humans assessed. (3) Results: Staphylococci decreased result for both wavelengths. At nm, it took about 7.5 h at 1 until reduction 90% reached. To meet higher disinfection requirements, disproportionately longer irradiation times necessary. The front pane 35 µW/cm2 less posed no humans. (4) Conclusions: Side-coupled is principle capable safely automatically disinfecting on screens. However, required still hour range, so that rapid within minute not yet possible presented setup. intensities might reduce current durations.
منابع مشابه
UVA-LED Air Disinfection
Department of Preventive Environment and Nutrition, Institute of Health Biosciences, 3-18-15, Kuramoto-cho, Tokushima city, Tokushima 770-8503, Japan Department of Electrical and Electronic Engineering, Institute of Socio Techno Sciences, 2-1, Miname Jyosanjima-cho, Tokushima city, 770-8506, Japan The University of Tokushima Graduate School Corresponding author: Akira Takahashi, M.D., Ph.D., De...
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ژورنال
عنوان ژورنال: Optics
سال: 2023
ISSN: ['2328-7810', '2328-7780']
DOI: https://doi.org/10.3390/opt4020023