ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS COMPONENT EVALUATION METHOD, EVALUATION DEVICE FOR THE METHOD, ELECTROPHOTOGRAPHIC PHOTORECEPTOR WHOSE SURFACE IS EVALUATED, AND IMAGE FORMING APPARATUS USING THE PHOTORECEPTOR

摘要

PROBLEM TO BE SOLVED: To provide an evaluation method and an evaluation device for the method, which enable correction of variations in the lighting intensity of an illumination composing an evaluation device, a decrease in the peripheral light quantity of a lens, variations in light quantity caused by an optical system, variations in the sensitivity of a measuring sensor, etc., thereby highly accurately detecting only variations in an object being evaluated.;SOLUTION: In the method for evaluating an electrophotographic image forming apparatus component surface, a component for the electrophotographic image forming apparatus is an object to be evaluated. While the object to be evaluated is rotated, the surface is optically measured by a primary line sensor or a secondary line sensor, thereby creating secondary image data corresponding to the surface of the substrate as an object being evaluated. The secondary multiple resolution of the secondary image data is analyzed to obtain low-frequency component image data and high-frequency component image data. Further, unevenness of the evaluation device which have occurred in the low frequency image data and high frequency image data are corrected to evaluate the surface of the object being evaluated.;COPYRIGHT: (C)2004,JPO