Full-frame flash illumination system

摘要

A full-frame flash illumination and imaging system wherein an illumination mechanism compensates for unwanted charge variations on a photoreceptor belt caused by reflections of the lens from the document platen. The area of the belt upon which the negative lens image is formed is predetermined and a controlled quantity of light is directed towards this area, either before, after, or during exposure, to reduce the charge level of the area, to the degree necessary to compensate for the negative lens image. Several illumination mechanisms are disclosed including a programmable LED array and various mask configurations.