| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaluation device for durability characteristics of a photoreceptor, the device that can evaluate durability of a photoreceptor against an afterimage without outputting an image and can be applied to photoreceptors having different processes. SOLUTION: A first charger 11, an exposure means 12, a second charger 13 in an opposite polarity to that of the first charger 11, and a destaticizer 14 for removing residual electrostatic charges are sequentially disposed in a periphery of a drum photoreceptor; and potentiometer probes 1, 2, 3 to measure a surface potential are disposed between the first charger 11 and the exposure means 12, between the exposure means 12 and the second charger 13, and between the second charger 13 and the destaticizer 14, respectively. This system is controlled in such a manner that the photoreceptor is repeatedly exposed and in the second turn of exposure, the photoreceptor is exposed with luminous energy lower than in the first turn, and that each timing of destaticizing, charging and exposing is controlled to obtain a constant total output current of the second charger 13. COPYRIGHT: (C)2008,JPO&INPIT
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