JP2014106169A5

JP2014106169A5 -

Info

Publication number: JP2014106169A5
Application number: JP2012260490A
Authority: JP
Filing date: 2012-11-29
Publication date: 2015-11-12
Anticipated expiration: 2032-11-29

Claims

A potentiometer for measuring a potential difference using an electro-optic effect,
An optical crystal having first and second opposing surfaces, wherein the first and second surfaces are optically polished;
First and second transparent electrodes disposed in the vicinity of the end of the first or second surface of the optical crystal and closely coated on the surface, and in which measurement light is incident and emitted. First and second transparent electrodes;
First and second metal electrodes functioning as reflection mirrors, which are closely coated on surfaces of the first and second surfaces of the optical crystal other than the first and second transparent electrodes, and having a potential difference First and second metal electrodes connected to a pair of terminals to be measured to be measured,
A potentiometer, wherein a potential difference between the pair of terminals to be measured can be calculated based on the intensity of measurement light emitted from the second transparent electrode.

2. The potentiometer according to claim 1, wherein the intensity of the emitted measurement light is calculated based on an electric field component in a direction perpendicular to the opposed first and second surfaces.

3. The potentiometer according to claim 1, wherein the first and second transparent electrodes are arranged in the vicinity of a pair of end portions of any one of the first and second surfaces of the optical crystal.

The said 1st and 2nd transparent electrode is each edge part of the 1st and 2nd surface of the said optical crystal, Comprising: It is arrange | positioned in the vicinity of a pair of edge part which is not facing. The potentiometer described.

5. The potentiometer according to claim 1, wherein one of the pair of terminals to be measured is coupled to a ground wire, and the other is coupled to a detection conductor disposed in the vicinity of the conductive wire to be measured. Thus, a potentiometer capable of measuring a potential difference in a non-contact state with the conductive wire to be measured.

5. The potentiometer according to claim 1, wherein one of the pair of terminals to be measured is coupled to a first detection conductor disposed in the vicinity of a conductive wire to be measured, and the other is measured with the measurement object. A potentiometer capable of measuring a potential difference in a non-contact state with the conductive wire to be measured by being coupled to a second detection conductor disposed in the vicinity of the conductive wire.

5. The potentiometer according to claim 1, wherein one of the pair of terminals to be measured is coupled to a ground line, and the other is directly coupled to a conductive line to be measured, thereby measuring the measurement object. A potentiometer that makes it possible to measure the potential difference in contact with a conductive wire.

The potentiometer according to any one of claims 1 to 7, wherein the incident measurement light is incident on the first transparent electrode through a first optical fiber and is emitted from the second transparent electrode. The measuring light is further emitted through a second optical fiber.

9. The potentiometer according to claim 8, wherein the potentiometer is coupled to an oscillator and a lock-in amplifier, and the oscillator includes one of the first and second metal electrodes and the lock-in amplifier. Coupled to the amplifier,
The oscillator is configured to modulate the incident measurement light at the one metal electrode and supply a reference signal to the lock-in amplifier;
The potential difference measuring device, wherein the lock-in-up is configured to perform synchronous detection using the reference signal with respect to the electrical signal of the measurement light modulated and emitted.

A potential difference measuring method using a potentiometer utilizing an electro-optic effect,
The potentiometers are a pair of metal electrodes provided on opposite surfaces of the optical crystal, respectively, to which a voltage is applied. A functioning metal electrode; a pair of transparent electrodes disposed in the vicinity of a surface end of the optical crystal and closely coated on the surface; and a calculating means for calculating a potential difference between the pair of metal electrodes. The potential difference measuring method is
Applying a voltage to the metal electrodes to form an electric field between the metal electrodes;
Injecting measurement light through one of the pair of transparent electrodes, and entering the measurement light at a given angle with respect to the surface of the optical crystal;
Multiple reflection of the measurement light within the optical crystal by the reflection mirror;
Emitting the multiple reflected measurement light through the other of the pair of transparent electrodes;
Calculating a potential difference between the pair of metal electrodes based on an emission intensity of the emitted measurement light.