JPS55149850A - Non-contact electrometer - Google Patents
Non-contact electrometerInfo
- Publication number
- JPS55149850A JPS55149850A JP399579A JP399579A JPS55149850A JP S55149850 A JPS55149850 A JP S55149850A JP 399579 A JP399579 A JP 399579A JP 399579 A JP399579 A JP 399579A JP S55149850 A JPS55149850 A JP S55149850A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electric field
- electrometer
- conversion means
- distance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE: To minimize an error occurring due to variations in measuring distance of a non-contact electrometer, by automatically varying the amplification degree of the electrometer in accordance with its measuring distance.
CONSTITUTION: A voltage-electric field conversion means A is adapted to generate an electric field E1 by a measured electric potential VIN from a sample. A voltage- electric field conversion means A' is adapted to generate an electric field E2 by an output VOUT from an electrode opposed thereto, which constitutes a part of a sealed case for an electrometer probe. An electric field-voltage conversion means B is adapted to convert the difference between the electric fields E1, E2 into a voltage. This voltage is input into an amplifier C the degree of amplification of which is varied in accordance with a distance measured by a distance measuring instrument F. An output from the amplifier C is applied to a high voltage control circuit E through a synchronous detector and an integrator D.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP399579A JPS55149850A (en) | 1979-01-19 | 1979-01-19 | Non-contact electrometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP399579A JPS55149850A (en) | 1979-01-19 | 1979-01-19 | Non-contact electrometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55149850A true JPS55149850A (en) | 1980-11-21 |
Family
ID=11572583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP399579A Pending JPS55149850A (en) | 1979-01-19 | 1979-01-19 | Non-contact electrometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55149850A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05172886A (en) * | 1991-06-24 | 1993-07-13 | Shishido Seidenki Kk | Surface electric potential measuring device |
-
1979
- 1979-01-19 JP JP399579A patent/JPS55149850A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05172886A (en) * | 1991-06-24 | 1993-07-13 | Shishido Seidenki Kk | Surface electric potential measuring device |
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