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US 7,741,851 B2Granted
Potential measuring apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTakashi Ushijima, Yoshikatsu Ichimura, Atsushi Kandori, Yoshitaka Zaitsu
Life of this patent
Estimating the term…
Abstract
A potential measuring apparatus has a detection electrode on which an electric charge is induced according to a potential of a detection object, and a modulator for altering the generated quantity of the electric charge. The detection electrode has at least one depressed portion on a surface opposite to the detection object.
Claims3
A potential measuring apparatus comprising:
- a detection electrode on which an electric charge is induced according to a potential of an object, said detection electrode being disposed on an insulating surface of a support member opposite to the object,
- wherein said detection electrode is a continuous piece of material and has depressed and projected portions,
- wherein at the depressed portions the insulating surface is exposed, and the projected portions are electrically connected to each other, and
- wherein said support member is rotatably supported by a beam such that a distance between the object and the detection electrode is altered to alter a quantity of the electric charge.
1 more element
A potential measuring apparatus comprising:
- a detection electrode on which an electric charge is induced according to a potential of an object, said detection electrode being disposed on an insulating surface of a support member opposite to the object,
- wherein said detection electrode is a continuous piece of material and has depressed and projected portions,
- wherein at the depressed portions the insulating surface is exposed, and the projected portions are electrically connected to each other, and
- wherein a shutter is arranged between the object and the detection electrode such that said shutter alters a quantity of the electric charge.
1 more element
A potential measuring apparatus comprising:
- a plurality of detection electrodes on which an electric charge is induced according to a potential of an object, said detection electrodes being disposed on an insulating surface of a support member opposite to the object,
- a plurality of shutters each arranged between the object and the detection electrodes such that said shutters alter a quantity of the electric charge,
- wherein each of said plurality of detection electrodes is a continuous piece of material and has depressed and projected portions, and
- wherein at the depressed portions the insulating surface is exposed, and the projected portions are electrically connected to each other.
1 more element
Dependencies are inferred from the claim text.