Far UV-C Beam Propagation Characterization in Air Medium for Human Friendly Virus Sterilization

Emerging of the Coronavirus Disease 2019 (COVID-19) since the end of 2019, calls scientist to develop various ways to combat the disease. One of the possible ways is to develop human friendly sterilization room. We report characterization of far UV-C beam propagation in air medium. Several distances and radiation angles of the far UV-C beam was experimentally measured using an UV optical spectrum meter. As a result, the beam has irradiance loss of 0.02 – 0.2 dB/cm and beam radiation angle of about 150 degree for vertical and 180 degree for horizontal. The far UV-C beam can be used for airborne virus sterilization and safe to human skin or eyes. The exposure time varies to the distance from the UVC source.