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    • 8. 发明申请
    • Contactless system and method for detecting defective points on a chargeable surface
    • 用于检测可充电表面上的缺陷点的非接触式系统和方法
    • US20070080693A1
    • 2007-04-12
    • US11247576
    • 2005-10-11
    • Johann JungingerZoran PopovicSurendar Jeyadev
    • Johann JungingerZoran PopovicSurendar Jeyadev
    • G01N27/60
    • G03G15/751G03G15/55
    • A method for detecting charge defect spots (CDSs) on a chargeable surface is provided, including charging the chargeable surface to receive and hold a first voltage charge, spacing a surface of a scanner probe a distance from the chargeable surface, the scanner probe having a diameter, and biasing the scanner probe to a second voltage charge within a predetermined voltage threshold of the first voltage charge, wherein a parallel plate capacitor is established with the chargeable surface and a dielectric substance between the scanner probe and the chargeable surface. The method further includes reading with the scanner probe potentials associated with charges induced from the applied charges and any CDSs on the chargeable surface, including sensing the potentials and generating a signal corresponding to the sensing, applying a reference charge to the chargeable surface, and determining the potential of a CDS on the chargeable surface based on the scanner probe readings and at least one of the applied charges, which includes correcting for non-uniform charge distribution caused by a point-like nature of the CDS on the chargeable surface.
    • 提供了一种用于检测可充电表面上的电荷缺陷点(CDS)的方法,包括对可充电表面充电以接收和保持第一电荷电荷,将扫描器探针的表面与可充电表面间隔一定距离,扫描仪探针具有 并且将扫描仪探针偏置到第一电压电荷的预定电压阈值内的第二电压电荷,其中与可充电表面建立平行板电容器,并且在扫描仪探针与可充电表面之间建立介电物质。 该方法还包括利用扫描器探针电位读取与所施加的电荷和可计费表面上的任何CDS相关的电荷,包括感测电位并产生对应于感测的信号,向可计费表面施加参考电荷,以及确定 基于扫描器探针读数和所施加的电荷中的至少一个,可充电表面上的CDS的电位,其包括校正由可充电表面上的CDS的点状特性引起的不均匀的电荷分布。