Device for measuring surface potentials at photosensitive body a

Details Device for measuring surface potentials at photosensitive body a Device for measuring surface potentials at photosensitive body a

1991-07-10

1993-01-26

Pendegrass, Joan H.

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324457, 355208, G03G 1500

Patent

active

051825961

ABSTRACT:
A device for measuring a surface potential at a photosensitive body including: a potential sensor for measuring surface potentials at a plurality of positions on the photosensitive body; a plurality of sample hold circuits; and an adder for adding each measured surface potential held in each sample hold circuit, or an adder which adds up each measured surface potential and average the sum. The addition or averaging of the measured values serves to eliminate eccentricity-induced errors and noise in the surface potential measurements, thereby allowing a correct surface potential to be obtained.

REFERENCES:
patent: 3674353 (1992-07-01), Trachtenberg
patent: 4019102 (1977-04-01), Wallot
patent: 4063154 (1977-12-01), Andrus et al.
patent: 4284344 (1981-08-01), Okamoto et al.
patent: 4341461 (1982-07-01), Fantozzi
patent: 5040021 (1991-08-01), Fowlkes
patent: 5066918 (1991-11-01), Pazda et al.

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