Optical Filter Enabled Continuous Disinfection of Hospital Rooms Using Multi-Sensor Feedback Aided Light Source

Abstract

In this paper, We have implemented an efficient technique for the inactivation of pathogens in the air and on the surfaces of the hospital rooms. These rooms are the main source of the bacterial diseases spreading in the locality and thereby contaminating the environment. So, a new method is taken into account which uses the wavelength light centered at 405 nm for the disinfection process. The inactivation process of bacteria’s is caused by the 405 nm light which targets the intra-cellular porphyrin of the pathogens which absorbs the light and bacteria’s are eliminated due to the generation of reactive oxygen species in their body. This process has been successfully achieved by the proposed model system. This system uses the light source assembly as a primary source that emits the white light in the broad spectrum which ranges from 450-475 nm that lies in the visible spectrum region. Then this broad spectrum white light is passed through the high-intensity narrow band pass optical filter which reduces the wavelength in the range of 400-410 nm having wavelength centered at 405 nm. Along with this, a multi-sensor adaptive feedback network is also applied to the system which changes the intensity level of the disinfecting light depending on the density of the bacteria’s present in the room. This adaptive nature of the system helps in reducing the power consumption by the system which is necessary in case of continuous disinfection process. This method holds an upper hand over the ultraviolet light devices (UV-C) technique which uses the wavelength in the range of 254-360 nm for the disinfection process. Since the 405 nm light lies in the visible spectrum, hence it is safe to use in presence of a person in the room, thus making the system a continuous process for the disinfection.