Inventors: Matteo Maria MAIFRINIAndrea USUELLIGoogle Patents PDF: https://patents.google.com/patent/EP4237886A1/en?oq=EP4237886AbstractThe invention relates to an ultraviolet radiation filter which is substantially opaque against ultraviolet radiations having a wavelength between 230 nanometers and 340 nanometers, and having maximum transmittance against UV-C radiations the wavelength of which is in a small range around 222 nanometers. The filter comprises a 99.9%…
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