High speed imaging of electrophotographic film by fine beam scanning

摘要

Half-tone xerography involving high speed charging of a limited region of an electrophotographic member and subsequent high speed discharging as by writing with a fine laser beam upon the limited region of the electrophotographic member, the beam being modulated with recordable intelligence from stored digital data. The member is mounted for rotary and axial movement relative to both charging unit and an axial movement beam directing unit. The member as a unit and a charging device and writing device as a unit are mounted for relative axial and rotating movement to enable charging and imaging of the limited regions in a continuous progressive manner.