Patent ID: 7869099

Claim:
An image diagnostic system for an electrophotographic engine, comprising: a photoreceptor with a photoreceptor surface; a raster scanning system including at least one light source that illuminates the photoreceptor surface with light with corresponding pixel clock for monitoring spatial information such that light energy is transmitted from the photoreceptor surface; at least a first image sensor and at least a second image sensor that each receive the light energy transmitted from the photoreceptor surface and transform the light energy into corresponding spatial image maps of the photoreceptor surface; the at least the first image sensor is disposed to receive the light energy transmitted from the photoreceptor surface between a developing station and a cleaning station; the at least the second image sensor is disposed to receive the light energy transmitted from the photoreceptor surface between the cleaning station and a charging station; and an image processing system that evaluates the spatial image maps of the photoreceptor surface by comparing the spatial image maps to reference spatial image maps, and determines whether an image defect is present, wherein when the image processing system determines that an image defect is present, a corrective action is taken by the image diagnostic system to correct the defect by one of: (1) adjusting an electrophotographic subsystem, or (2) adjusting an amount of toner, and the photoreceptor is separate from the at least the first and second image sensor.