Halftone banding due to vibrations in a xerographic image bar printer

An imaging model has been developed to investigate halftone banding due to photoconductor vibrations. Nonuniform, vibratory motion of the photoconductor in an image bar printer leads to exposure modulation in halftoned areas on the photoconductor and reflectance modulation on the print. The exposure modulation at the spatial frequency of the vibration is proportional to the fractional velocity error, but is relatively independent of system parameters for typical cases. A xerographic system model has been coupled to the imaging model to calculate the print reflectance modulation (banding) due to vibrations