MODULATION TRANSFER-FUNCTION FOR DEVELOPMENT TO COMPLETE FIELD NEUTRALIZATION

The method employed by Streifer and Stark to calculate toner pile heig ht due to the development to field neutralization of weak sinusoidal i mage patterns superposed on a solid area is extended to cover realisti c development systems by applying more general boundary conditions on the free surface of the toner layer. We found that as long as the alte red boundary conditions do not vary spatially, the effects of the new boundary conditions are propagated via a single parameter: the toner p ile height corresponding to a solid area part of the image. This findi ng allows us to extend the realm of the analysis to the case of partia l neutralization, provided some conditions are met by the development process. A theoretical development modulation transfer function (MTF) is derived from the toner pile height calculations. The variation of t his MTF as a function of the solid area toner pile height is exploited to obtain the theoretical MTFs for the development of multiple layers in color xerography.