METHOD AND DEVICE FOR CHARGING FINE PARTICLE

摘要

PURPOSE:To electrically charge fine particles by using ultraviolet light which does not generate particle by irradiation. CONSTITUTION:By applying ultraviolet light 22 to a photoelectron discharge material 21 for inducing photoelectron discharge, the fine particles included in a space are charged by the photoelectron in this charging method. For the ultraviolet light used in this method, the wave length 200nm and below is cut with an ultraviolet light cutting filter 26 and the like.