JPS57184979A - Photo measuring device - Google Patents
Photo measuring deviceInfo
- Publication number
- JPS57184979A JPS57184979A JP56071806A JP7180681A JPS57184979A JP S57184979 A JPS57184979 A JP S57184979A JP 56071806 A JP56071806 A JP 56071806A JP 7180681 A JP7180681 A JP 7180681A JP S57184979 A JPS57184979 A JP S57184979A
- Authority
- JP
- Japan
- Prior art keywords
- light
- photo
- temperature
- wavelength
- supplied
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
- G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
PURPOSE:To perform a photo measurement being excellent in a temperature property, by a method wherein two types of lights being different in wavelength, are used, a physical volume is measured by one wavelength light, and temperature by the other wavelength light to correct a physical volume measuring signal by the use of a temperature measuring signal. CONSTITUTION:Light emitting devices 9 and 10 generate two lights having light wavelengths lambda1 and lambda2, respectively. A light composing device 11 composes luminous outputs fed from the light emitting devices 9 and 10 through optical fibers 2a to feed it to a photo-magnetic field sensor 3. The supplied light is collected by a micro lens 4a and is supplied to a polarizer 5 for the rectilinear polarization. The polarized light is supplied to a detector 7 through a photo Faraday element 6 and a photo-temperature detecting element 12, and an amount of light, having the wavelength lambda1, absorbed by the element 12 varies with temperature. The output of the sensor 3 is applied to light detectors 14 and 15 via a photo devider 13 mounted to the optical fiber 2b, and the light detectors 14 and 15 fetch only the wavelengths lambda1 and lambda2, respectively, to convert them into an electric signal. The outputs of the light detectors 14 and 15 are computed and processed by a signal processing circuit 16 to supply them to an output terminal 17.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56071806A JPS57184979A (en) | 1981-05-09 | 1981-05-09 | Photo measuring device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56071806A JPS57184979A (en) | 1981-05-09 | 1981-05-09 | Photo measuring device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57184979A true JPS57184979A (en) | 1982-11-13 |
Family
ID=13471174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56071806A Pending JPS57184979A (en) | 1981-05-09 | 1981-05-09 | Photo measuring device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57184979A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0572307A (en) * | 1991-09-18 | 1993-03-26 | Ngk Insulators Ltd | Magnetic field measuring device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5629174A (en) * | 1979-08-17 | 1981-03-23 | Matsushita Electric Ind Co Ltd | Electric current measuring device |
-
1981
- 1981-05-09 JP JP56071806A patent/JPS57184979A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5629174A (en) * | 1979-08-17 | 1981-03-23 | Matsushita Electric Ind Co Ltd | Electric current measuring device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0572307A (en) * | 1991-09-18 | 1993-03-26 | Ngk Insulators Ltd | Magnetic field measuring device |
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