Control system for microwave powered ultraviolet light sources

摘要

In microwave energized ultraviolet bulbs, much of the input energy is converted to heat emissions. It has been found that the efficiency of such a bulb can be optimized by monitoring power density of different portions of the UV spectrum (for example, UVA and UVC) and adjusting input power to the bulb and/or the bulbs temperature accordingly. This may be used not only to improve efficiency of the bulb but also to improve the efficiency of emissions at either UVA or UVC. A control system and suitable control parameters are described.