Patent ID: 6529223
Filing Date: 2003-03-04
Classification: G06K,H04N

Abstract:
An image forming apparatus comprising:an image bearing body; charging means for charging said image bearing body; and exposing means for exposing said image bearing body charged by said charging means, wherein said exposing means illuminates with a light beam each pixel corresponding to a non-image portion of a pixel matrix having plural rows and plural columns, and wherein, when it is assumed that a width of one pixel in the pixel matrix is A and a distribution width in a half value of a maximum potential value of a potential distribution formed without illumination by the light beam of one pixel is Wv, the following relationship is satisfied: 0.6&lE;Wv/A&lE;1.4, wherein said image forming apparatus further comprises control means for measuring the potential distribution and for controlling a spot diameter of the light beam and/or a light amount of the light beam.