| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric potential measuring device capable of accurately measuring surface electric potential of charged body without using eccentricity of the charged body and a lead current. <P>SOLUTION: The electric potential measuring device has an electrode 9 arranged close to a rotationally driven photo conductor 2, and a voltage detector 7 detecting the surface potential data around the photo conductor 2 which is induced to the electrode 9 when a voltage over an impressing voltage or a current over an impressing current for saturating the photo conductor 2, in the photo conductor 2, as a calibration data. In this manner, the calibration data is taken around the photo conductor 2 so that the charging potential of the photo conductor 2 sufficiently stabilizes in setting. Even if the measured data includes errors due to the eccentricity of the photo conductor 2, the errors can be eliminated and exact surface potential can be measured. <P>COPYRIGHT: (C)2007,JPO&INPIT |
