Surface potential electrometer and image forming apparatus using

Details Surface potential electrometer and image forming apparatus using Surface potential electrometer and image forming apparatus using

1985-03-21

1987-07-28

Levy, Stewart J.

Electricity: measuring and testing

Electrostatic field

Using modulation-type electrometer

324 72, 324118, G01R 2912

Patent

active

046834362

ABSTRACT:
The surface potential electrometer includes a reciprocating chopper, a measuring electrode on which a voltage is induced which is associated with the surface potential of a member to be measured, a shield member for shielding the measuring electrode and the chopper from electric field emanating from the member to be measured, and a driver for driving the chopper, thereby detecting the surface potential of the member in the form of an AC signal. The shield member is provided with an aperture for guiding the electric field emanating from the member to the measuring electrode.

REFERENCES:
patent: 3195037 (1965-07-01), Van Nie
patent: 3370225 (1968-02-01), Winder
patent: 4149119 (1979-04-01), Buchheit
patent: 4205267 (1980-05-01), Williams
patent: 4266870 (1981-05-01), Eda et al.

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