| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface potential measuring apparatus capable of performing accurate measurement without dependence on a measuring distance from a charging object. <P>SOLUTION: The surface potential measuring apparatus includes a distance sensor 4 for measuring a distance L up to the surface of a charging object T, potential detection means 3 for detecting potential which is surface potential of the charging object and is obtained along an attenuation curve to be attenuated in accordance with a distance from the charging object, and arithmetic means 2. The arithmetic means 2 stores α=a×L+b as an arithmetic expression for calculating correction coefficient α which is 1 in a reference distance Lb previously set together with a distance L and constants a, b to remove distance dependence of the attenuation curve, calculates the correction coefficient α based on the distance L detected by the distance sensor 4, multiplies potential Vm detected by the potential detection means 3 by the correction coefficient α and outputs the multiplied result as the surface potential of the charging object. <P>COPYRIGHT: (C)2013,JPO&INPIT |
